WesternGeco LLC Patent applications |
Patent application number | Title | Published |
20150338538 | MULTI-MODEL SEISMIC PROCESSING OPERATION - Systems and methods for seismic processing are provided. For example, the method may include modeling seismic data as a combination of a modeling matrix and a parameter vector, and determining a plurality of solution spaces of filter models for the parameter vector. The method may also include calculating data residual terms for the filter models, wherein the data residual terms are related to a difference between the seismic data and a combination of the modeling matrix and the parameter vector determined using the filter models. The method may further include selecting a solution filter model for the parameter vector from among the filter models based on a combination of the data residual terms and complexities of the filter models, and performing a seismic processing operation using the solution filter model and the seismic data. | 11-26-2015 |
20150316667 | MEMS-BASED ROTATION SENSOR FOR SEISMIC APPLICATIONS AND SENSOR UNITS HAVING SAME - The present disclosure is directed to a MEMS-based rotation sensor for use in seismic data acquisition and sensor units having same. The MEMS-based rotation sensor includes a substrate, an anchor disposed on the substrate and a proof mass coupled to the anchor via a plurality of flexural springs. The proof mass has a first electrode coupled to and extending therefrom. A second electrode is fixed to the substrate, and one of the first and second electrodes is configured to receive an actuation signal, and another of the first and second electrodes is configured to generate an electrical signal having an amplitude corresponding with a degree of angular movement of the first electrode relative to the second electrode. The MEMS-based rotation sensor further includes closed loop circuitry configured to receive the electrical signal and provide the actuation signal. Related methods for using the MEMS-based rotation sensor in seismic data acquisition are also described. | 11-05-2015 |
20150253442 | SOLID MARINE SEISMIC STREAMERS - A marine seismic streamer comprising a solid, hydrophobic core member that is encased in a hydrophobic streamer skin/casing. The hydrophobic streamer skin may be extruded onto and/or heat welded to the hydrophobic core member. The hydrophobic streamer skin/casing may comprise a thermoplastic polyurethane that includes fluorine and/or silicon moieties, silicon, polydimethylsiloxane or the like. The hydrophobic streamer skin/casing may reduce the drag of the streamer and may provide anti-biofouling properties to the streamer. A hydrophobic paint, coating or polymer may in some instances be disposed on top of the hydrophobic streamer skin/casing. | 09-10-2015 |
20150047903 | ANALYSIS OF GEOLOGICAL OBJECTS - A method of determining a search expression describing a feature of interest in a set of data points distributed throughout a geological object is provided. Each data point contains a value for a geological attribute at that point. The search expression has a plurality of entries. The method including the steps of: (i) displaying the geological object using display codings corresponding to value subranges for the geological attribute such that all data points which have values for the geological attribute falling within a given value subrange are displayed with the same coding; (ii) selecting a plurality of data points of the feature of interest; and (iii) allocating value characters to entries of the search expression, the value characters corresponding to the value subranges for the geological attribute of the selected data points. | 02-19-2015 |
20150043307 | MULTI-VESSEL COIL SHOOTING ACQUISITION - Methods for efficiently acquiring full-azimuth towed streamer survey data are described. The methods use multiple vessels to perform coil shooting. | 02-12-2015 |
20140372044 | SEISMIC DATA PROCESSING - Disclosed herein are implementations of various technologies for a method for seismic data processing. The method may receive seismic data for a region of interest. The seismic data may be acquired in a seismic survey. The method may determine an exclusion criterion. The exclusion criterion may provide rules for selecting shot points in the acquired seismic data. The method may determine sparse seismic data using statistical sampling based on the exclusion criterion and the acquired seismic data. The method may determine simulated seismic data based on the earth model and shot points corresponding to the sparse seismic data. The method may determine an objective function that represents a mismatch between the sparse seismic data and the simulated seismic data. The method may update the earth model using the objective function. | 12-18-2014 |
20140362661 | UNMANNED VEHICLE-BASED SEISMIC SURVEYING - A technique includes a technique includes providing a plurality of acquisition components for performing a survey of a geologic region of interest, where the plurality of acquisition components comprising receivers and at least one source. The technique includes using at least one marine unmanned vehicle to position at least one of the receivers in the survey; and deploying at least at one of the acquisition components in a well or on land. | 12-11-2014 |
20140355380 | SYSTEM AND METHOD FOR SEISMIC STREAMER CONTROL - A control system for use in a marine seismic survey is provided. The system may include one or more processors configured to receive a desired position for one or more seismic streamers during the marine seismic survey. The one or more processors may be further configured to determine a current position for the one or more seismic streamers and to adjust a position of a steering device on each streamer, based upon, at least in part, a comparison between the current position of the one or more seismic streamers and the desired position of the one or more seismic streamers. | 12-04-2014 |
20140324358 | SURFACE MULTIPLE PREDICTION - Methods and computing systems for processing collected data are disclosed. In one embodiment, a method is provided for predicting a plurality of surface multiples for a plurality of target traces in a record of multi-component seismic data acquired in a survey area. The method may select a target trace. The method may select an aperture of potential downward reflection points for the target trace. The method may calculate dip propagation attributes from the multi-component seismic data. The method may map the dip propagation attributes into a multiple contribution attribute gather based on the aperture. The method may modify the aperture based on the multiple contribution attribute gather. The method may then predict multiples for the selected target trace using the modified aperture. | 10-30-2014 |
20140324357 | SEISMIC INTERFEROMETRY FOR GRAND ROLL & NOISE ATTENUATION - Methods of acquiring and processing seismic data using derivative sensors, such as strain sensors, that facilitate ground roll noise attenuation with seismic interferometry are disclosed. The methods use both seismic data and their spatial derivatives in computing ground-roll noises which are removed from processed seismic data. | 10-30-2014 |
20140321239 | SEISMIC DATA ACQUISITION AND SOURCE-SIDE DERIVATIVES GENERATION AND APPLICATION - The technologies described herein include systems and methods for performing a first seismic survey and performing a second seismic survey after a predetermined amount of time has lapsed between the first seismic survey and the second seismic survey. The shot times and the shot positions of the second seismic survey may be substantially the same as the shot times and the shot positions of the first seismic survey. After performing the seismic surveys, seismic data generated by the first seismic survey may be processed to generate a first image, and seismic data generated by the second seismic survey may be processed to generate a second image. After generating the first and second images, a difference between the first image and the second image may be computed to generate a time lapse difference image. | 10-30-2014 |
20140301165 | SEISMIC DATA PROCESSING USING JOINT TOMOGRAPHY - Various implementations directed to seismic data processing using joint tomography are provided. In one implementation, a method may include receiving seismic data corresponding to a region of interest. The method may also include generating one or more first gathers and one or more second gathers based on the seismic data. The method may further include determining a relative shift in depth between at least a first event in the one or more first gathers and at least a second event in the one or more second gathers. The method may additionally include performing a joint tomography based at least in part on the first event, the second event, and the determined relative shift. | 10-09-2014 |
20140301163 | MARINE SEISMIC VARIABLE DEPTH CONTROL METHOD AND DEVICE - A method of acoustic positioning determination includes detecting a temperature gradient profile across a depth of water, determining a level of a thermal boundary between an upper temperature level and a lower temperature level, and determining a distance from the thermal boundary to position the acoustic positioning device and positioning the acoustic positioning device at that location. | 10-09-2014 |
20140297187 | JOINT INVERSION OF GEOPHYSICAL ATTRIBUTES - Described herein are implementations of various technologies for a method. The method may receive seismic attributes regarding a region of interest in a subsurface of the earth. The method may receive electrical attributes regarding the region of interest. The method may receive a selection of a rock physics model for the region of interest. The method may calculate values of rock parameters for the selected rock physics model using a nonlinear relation that links cross-properties between the seismic attributes and the electrical attributes for the region of interest. The method may determine the presence of hydrocarbon deposits in the region of interest using the calculated values. | 10-02-2014 |
20140288841 | REMOVING NOISE FROM A SEISMIC MEASUREMENT - A technique includes using a filter having filtering parameters based at least in part on a dispersion curve of at least one vibration mode of a streamer to filter a measurement acquired by at least one sensor of the streamer and using results of the filtering to suppress vibration noise present in the measurement. | 09-25-2014 |
20140288837 | ESTIMATING TRANSLATIONAL DATA - Translational data acquired by at least one seismic sensor is received. Gradient sensor data acquired by at least one gradient sensor is received. Estimated translational data at a position away from at least one position of the at least one seismic sensor is computed, where the computing is based on the gradient sensor data and the translational data. | 09-25-2014 |
20140286127 | PROCESSING SEISMIC DATA TO ATTENUATE VIBRATION NOISE - A technique includes receiving first data acquired by at least a particle motion gradient sensor or a rotation sensor of a streamer that is subject to vibration due to towing of the streamer; and receiving second data acquired by at least one particle motion sensor of the streamer and being indicative of particle motion and vibration noise. The technique includes processing the second data in a processor-based machine to, based at least in part on the first data, attenuate the vibration noise indicated by the second data to generate third data indicative of the particle motion. | 09-25-2014 |
20140286125 | SEISMIC ACQUISITION METHOD AND APPARATUS - A system and method for performing a seismic survey. The system includes a first seismic source and a second seismic source configured for generating seismic signals. The first seismic source is configured for generating seismic signals ranging from about 4 Hz to about 120 Hz. The second seismic source is configured for generating seismic signals ranging from about 0 Hz to about 8 Hz. The system includes receivers to receive seismic data in response to seismic signals generated by the seismic sources. | 09-25-2014 |
20140283615 | DETERMINING A SEISMIC VIBRATOR SIGNATURE - A method includes receiving a representation of a volume acceleration of a seismic vibrator. The method includes determining a signature of the seismic vibrator based at least in part on the representation of the volume acceleration. | 09-25-2014 |
20140278297 | PROCESSING DATA REPRESENTING ENERGY PROPAGATING THROUGH A MEDIUM - The present invention relates to a method of processing data representing energy propagating through a medium (e.g., acoustic, elastic or electromagnetic energy) and describes an efficient and flexible approach to forward modeling and inversion of such energy for a given medium. The representation theorem for the wave-equation is used, in combination with time-reversal invariance and reciprocity, to express the Green's function between two points in the interior of the model as an integral over the response in those points due to sources regularly distributed on a surface surrounding the medium and the points. | 09-18-2014 |
20140278119 | SEISMIC ACQUISITION USING PHASE-SHIFTED SWEEPS - A technique includes towing at least one seismic source in connection with a survey of a structure; and operating the seismic source(s) to fire shots, where each shot is associated with a frequency sweep. The technique includes varying phases of the frequency sweeps from shot to shot according to a predetermined phase sequence to allow noise in an energy sensed by seismic sensors to be attenuated. | 09-18-2014 |
20140278116 | FREQUENCY-SPARSE SEISMIC DATA ACQUISITION AND PROCESSING - A method includes receiving data representing measurements acquired by seismic sensors in response to energy that is produced by shots of a seismic source. The energy that is produced by the seismic source for each shot includes a plurality of discrete frequencies of discrete frequency bands that are within a frequency range of interest and are separated by at least one excluded frequency or frequency band. The data may be processed to determine at least one characteristic of a geologic structure. | 09-18-2014 |
20140269185 | TIME-LAPSE MONITORING - Described herein are implementations of various technologies for a method. The method may receive a baseline survey dataset for a region of interest. The method may obtain a transformed dataset from the baseline survey dataset using a transform. The method may determine sparsity characteristics from the transformed dataset. The method may determine survey parameters using the sparsity characteristics. The survey parameters may be for a monitor survey for the region of interest. | 09-18-2014 |
20140269173 | METHODS AND SYSTEMS FOR MARINE SURVEY ACQUISITION - A marine survey acquisition system. The system may include a vessel for towing a marine survey spread. The marine survey spread may include streamers, marine vibrators and a cable. The cable may be coupled to a respective streamer from among the streamers and one of the marine vibrators. The cable may power the respective streamer and the one of the marine vibrators. The one of the marine vibrators may emit energy at a high frequency range. | 09-18-2014 |
20140269172 | ANTI-FOULING SEISMIC STREAMER - A seismic streamer and associated method are provided. The seismic streamer may include a seismic streamer core having a cylindrical configuration. A melt-processable thermoplastic layer may be coupled with the seismic streamer core, the melt-processable thermoplastic layer being extruded to form a first tube. An elastomeric layer may be coupled with the melt-processable thermoplastic layer, the elastomeric layer being extruded to form a second tube. | 09-18-2014 |
20140269171 | SEISMIC STREAMER SYSTEM - A method of performing a marine survey is provided. The method may include deploying, into a body of water, a towable streamer including one or more sensors for performing a subterranean survey. The method may also include receiving, from the sensors, information relating to the subterranean survey at a data storage device housed within a portion of the towable streamer. The method may also include storing the information within the data storage device. | 09-18-2014 |
20140254308 | IDENTIFYING REFLECTION ACOUSTIC SIGNALS - Various implementations described herein are directed to identifying reflected acoustic signals. In one implementation, a method may include receiving initial positions of an acoustic positioning source and an acoustic positioning receiver of an acoustic positioning system in a seismic spread. The method may also include calculating an expected travel difference between the acoustic positioning source and the acoustic positioning receiver. The method may further include receiving an acoustic positioning signal from the acoustic positioning receiver. The method may additionally include calculating an actual travel difference between the acoustic positioning source and the acoustic positioning receiver based on the acoustic positioning signal. The method may further include comparing the actual travel difference to the expected travel difference. The method may also include identifying whether the acoustic positioning signal is a reflected positioning signal based on the comparison. | 09-11-2014 |
20140247697 | SEISMIC SOURCE CALIBRATION TECHNIQUE AND SYSTEM - A technique includes determining at least one parameter to regulate actuation of a seismic source based on a frequency-based maximum deliverable output for the source. The technique includes using at least one sensor to acquire a measurement of an output of the source in response to the source being regulated using the at least one parameter and processing data representative of the measurement in a processor-based machine to selectively update the frequency-based maximum deliverable output and the at least one parameter based at least in part on the measurement. | 09-04-2014 |
20140244179 | CONSTRUCTION AND REMOVAL OF SCATTERED GROUND ROLL USING INTERFEROMETRIC METHODS - A data set can be corrected for the effects of interface waves by interferometrically measuring an interface wavefield between each of a plurality of planned locations within a survey area; and correcting survey data acquired in the survey area for the interface waves. The interface wavefield may be interferometrically measured by receiving a wavefield including interface waves propagating within a survey area, the survey area including a plurality of planned survey locations therein; generating interface wave data representative of the received interface wavefield; and constructing a Green's function between each of the planned survey positions from the interface wave data. Other aspects include an apparatus by which the interface wavefield may be interferometrically measured and a computer apparatus programmed to correct the seismic data using the interferometrically measured interface wave data. | 08-28-2014 |
20140244177 | TIME LAPSE MARINE SEISMIC SURVEYING EMPLOYING INTERPOLATED MULTICOMPONENT STREAMER PRESSURE DATA - In a first aspect, a method for use in a time lapse, marine seismic survey includes accessing a set of acquired, multicomponent seismic data; and interpolating a set of time lapse seismic data from the acquired seismic data. In other aspects, a program storage medium is encoded with instructions that, when executed by a computing device, perform the above method and a computing apparatus programmed to perform one or more of such methods. | 08-28-2014 |
20140236487 | METHODS AND COMPUTING SYSTEMS FOR PROCESSING SEISMIC DATA - Methods and computing systems for processing seismic data are disclosed. In one embodiment, a method for processing seismic data comprises receiving seismic data that includes active data corresponding to an active shot from a seismic source. The processing includes processing at least a portion of the active data using a passive data processing technique. | 08-21-2014 |
20140219055 | COMPUTING ROTATION DATA USING A GRADIENT OF TRANSLATIONAL DATA - Translational data in a first direction is measured by particle motion sensors contained in an elongated housing of a sensor device provided at an earth surface. The particle motion sensors are spaced apart along a second, different direction along a longitudinal axis of the elongated housing. Rotation data around a third direction is computed based at least in part on computing a gradient of the translational data with respect to the second direction. | 08-07-2014 |
20140219053 | COMPUTING A GRADIENT BASED ON DIFFERENCES OF PLURAL PAIRS OF PARTICLE MOTION SENSORS - A seismic sensor device includes an elongated housing for placement at least partially into an earth surface. A plurality of particle motion sensors are contained in the elongated housing to measure translational data in a first direction, where plural pairs of the particle motion sensors are spaced apart along a second, different direction along a longitudinal axis of the elongated housing. A communication interface communicates the measured translational data to a computer system configured to compute a gradient based on respective differences of the measured translational data of the corresponding plural pairs of the particle motion sensors, and compute one or more of rotation data and divergence data using the gradient. | 08-07-2014 |
20140214328 | SALT BODY EXTRACTION - A method of extracting a salt body from a geological volume is provided. A starting object is located within the geological volume. The starting object defines an initial salt body boundary. Data points are distributed through the geological volume. The data points are associated with values of one or more geological attributes. The method includes the steps of: defining an expression which determines a change in position of the salt body boundary at the data points over an iteration based on the values of the one or more attributes; and applying the expression at the data points for successive iterations to evolve the salt body boundary over the successive iterations until a final form for the evolved salt body is achieved. | 07-31-2014 |
20140214327 | FLUID MIGRATION PATHWAY DETERMINATION - A method of determining a migration pathway of a subterranean fluid through a geological volume is provided. The starting object is located within the geological volume. The starting object defines an initial fluid boundary. Data points are distributed through the geological volume. The data points are associated with values of one or more geological attributes. The method includes the steps of: defining an expression which determines a change in position of the fluid boundary at the data points over an iteration based on the values of the one or more attributes; and applying the expression at the data points for successive iterations to evolve the fluid boundary over the successive iterations. The migration pathway of the subterranean fluid through the geological volume can then be determined from the evolution of the fluid boundary. | 07-31-2014 |
20140204709 | MULTI-VESSEL COIL SHOOTING ACQUISITION - Methods for efficiently acquiring full-azimuth towed streamer survey data are described. The methods use multiple vessels to perform coil shooting. | 07-24-2014 |
20140204708 | SEISMIC DATA ACQUISITION USING WATER VEHICLES - A seismic acquisition system. The seismic acquisition system may include at least one unmanned water vehicle. The seismic acquisition system may also include at least one seismic streamer coupled to the at least one unmanned water vehicle, where the at least one seismic streamer has one or more seismic sensors coupled thereto for recording seismic data in a survey area. The seismic acquisition system may further include a buoyancy compensation mechanism coupled to the at least one seismic streamer, where the buoyancy compensation mechanism is configured to orient the at least one seismic streamer between a generally vertical direction and a generally horizontal direction through a water column. | 07-24-2014 |
20140200854 | METHODS AND COMPUTING SYSTEMS FOR SURVEY DESIGN AND MODELING WORKFLOW FOR TOWED MULTIMEASUREMENT SEISMIC STREAMER DATA - Modular workflows for determining acquisition geometry and efficiency using 3D deghosting and wavefield reconstruction methods enabled by multicomponent seismic information are disclosed, which may be performed as methods. In some embodiments, such methods may be performed on computing systems. | 07-17-2014 |
20140200820 | WAVEFIELD EXTRAPOLATION AND IMAGING USING SINGLE- OR MULTI-COMPONENT SEISMIC MEASUREMENTS - Described herein are architectures, platforms, computing systems, and methods for mitigating noise in wavefield extrapolation and imaging. In one aspect, a method of wavefield extrapolation is provided that includes receiving data representing at least one measurement of pressure wavefield or particle motion wavefield; modeling the received data as a sum of signal and noise; providing a noise model to components of the received data; and weighting the measured components of the received data to reduce the impact of noise of results of the wavefield extrapolation. | 07-17-2014 |
20140200816 | SEISMIC DATA PROCESSING - Described herein are implementations of various technologies for a method for processing seismic data corresponding to a region of interest. The method may receive the seismic data. The method may separate the received seismic data into refraction packets and reflection packets. The method may receive a model for the region of interest. The method may update a first portion of the received model using the refraction packets with refraction traveltime tomography. The method may use the updated model to facilitate hydrocarbon exploration or production. | 07-17-2014 |
20140200812 | PROCESSING SURVEY DATA FOR DETERMINING A WAVEFIELD - Survey data corresponding to a subsurface region of interest is received. A wavefield is determined by iteratively performing the following until a specified condition is satisfied. For a current iteration, an element that includes a representation of at least one portion of the wavefield is selected based at least in part on a current residual representing an approximation error. For the current iteration, a respective data structure is computed from the selected element. The data structure is orthogonally projected onto a space spanned by a plurality of data structures including the computed data structure. The current residual is based at least in part on the orthogonal projection. | 07-17-2014 |
20140198610 | SEISMIC DATA ACQUISITION USING SELF-PROPELLED UNDERWATER VEHICLES - The present disclosure generally relates to the use of a self-propelled underwater vehicle for seismic data acquisition. The self-propelled underwater vehicle is adapted to gather seismic data from the seafloor and transmit such data to a control vessel. The self-propelled underwater vehicle may be redeployed to several seafloor locations during a seismic survey. Methods for real-time modeling of a target zone and redeployment of the self-propelled underwater vehicle based on the modeling are also described. | 07-17-2014 |
20140198609 | SEISMIC DATA ACQUISITION USING SELF-PROPELLED UNDERWATER VEHICLES - The present disclosure generally relates to the use of a self-propelled underwater vehicle for seismic data acquisition. The self-propelled underwater vehicle is adapted to gather seismic data from the seafloor and transmit such data to a control vessel. The self-propelled underwater vehicle may be redeployed to several seafloor locations during a seismic survey. Methods for real-time modeling of a target zone and redeployment of the self-propelled underwater vehicle based on the modeling are also described. | 07-17-2014 |
20140195611 | METHODS AND COMPUTING SYSTEMS FOR GEOSCIENCES AND PETRO-TECHNICAL COLLABORATION - Computing systems and methods for geosciences collaboration are disclosed. In one embodiment, a method for geosciences collaboration includes obtaining a first set of geosciences information from a first computer system of the plurality of computer systems; distributing the first set of geosciences information from the first computer system to at least a second computer system; receiving a user input from the second computer system of the plurality of computer systems, the user input entered manually by a user; providing the user input to the first computer system; in response to providing the user input to the first computer system, receiving a revised set of geosciences information from the first computer system; and repeating the receiving a user input, the providing the user input, and the receiving the revised set of geosciences information until the revised set of geosciences information is determined to satisfy accuracy criteria. | 07-10-2014 |
20140192620 | COMBINING SEISMIC DATA FROM SENSORS TO ATTENUATE NOISE - To perform noise attenuation for seismic surveying, a sensor assembly is deployed on a ground surface, where the sensor assembly has a seismic sensor to measure seismic waves propagated through a subterranean structure, and a divergence sensor comprising a pressure sensor to measure noise. First data is received from the seismic sensor, and second data is received from the divergence sensor. The first data and the second data are combined to attenuate noise in the first data. | 07-10-2014 |
20140160887 | TIME LAPSE MARINE SEISMIC SURVEYING EMPLOYING INTERPOLATED MULTICOMPONENT STREAMER PRESSURE DATA - In a first aspect, a method for use in a time lapse, marine seismic survey includes accessing a set of acquired, multicomponent seismic data; and interpolating a set of time lapse seismic data from the acquired seismic data. In other aspects, a program storage medium is encoded with instructions that, when executed by a computing device, perform the above method and a computing apparatus programmed to perform one or more of such methods. | 06-12-2014 |
20140160886 | COMMUNICATION SYSTEMS FOR WATER VEHICLES - Various technologies described herein are directed to a method that includes deploying a plurality of wave gliders in a seismic survey area, where the plurality of wave gliders has one or more seismic sensors coupled thereto for acquiring seismic data. The method may also include deploying at least one source vessel in the seismic survey area, where the at least one source vessel has one or more sources coupled thereto and a central communication unit disposed thereon. The method may then include positioning the plurality of wave gliders according to an initial navigation plan. The method may further include monitoring a relative position of a respective wave glider in the plurality of wave gliders with respect to other wave gliders in the plurality of wave gliders and with respect to the at least one source vessel. | 06-12-2014 |
20140140172 | DEGHOSTING MEASURED SURVEY DATA - Propagation of wavefields are simulated along paths in a survey environment, where the simulated propagation includes an influence of a reflection at an interface that causes ghost data in measured survey data. Deghosting of the measured survey data is performed using the simulated wavefields. | 05-22-2014 |
20140133274 | SEISMIC SENSOR DEVICES - A sensor device is adapted to be installed at a land-air interface. The sensor device comprises a fluid-filled housing and a sensor arrangement supported within the housing and coupled directly to the fluid so as to detect movement thereof. A seismic sensor installation comprises a sensor device installed at a land-air boundary, wherein the sensor device comprises a fluid-filled housing and a sensor arrangement supported within the housing and coupled directly to the fluid as to detect movement thereof. | 05-15-2014 |
20140119158 | VOLTAGE LEAKAGE DETECTION FOR SERIALLY CONNECTED ELECTRICAL NODES IN A SEISMIC SURVEYING SYSTEM - A seismic survey apparatus includes a plurality of serially connected electrical nodes; a power supply capable of supplying power to the electrical nodes and detecting a voltage leakage among the electrical nodes; and a software component capable of locating the leakage upon its detection. A method for use in seismic surveying includes powering a plurality of serially connected electrical nodes in a seismic surveying system; automatically detecting a voltage leakage among the electrical nodes on the power domain; and automatically locating the detected voltage leakage. | 05-01-2014 |
20140078865 | SEISMIC ACQUISITION SYSTEM-BASED UNMANNED AIRBORNE VEHICLE - A system includes a seismic acquisition system that includes a plurality of nodes and further includes an unmanned airborne vehicle. The unmanned airborne vehicle is to be used with the seismic acquisition system to conduct a seismic survey. | 03-20-2014 |
20140060957 | METHOD AND SYSTEM FOR SELECTING PARAMETERS OF A SEISMIC SOURCE ARRAY - A method for selecting parameters of a seismic source array comprising a plurality of source elements each having a notional source spectrum is described, the method comprising calculating a ghost response function of the array; calculating directivity effects of the array; and adjusting the parameters of the array such that the directivity effects of the array are compensated by the ghost response to minimize angular variation of a far field response in a predetermined frequency range. A method for determining a phase center of a seismic source array is also related, the method comprising calculating a far field spectrum of the array at predetermined spherical angles, and minimizing the phase difference between the farfield spectra within a predetermined frequency range by adjusting a vertical reference position from which the spherical angles are defined. | 03-06-2014 |
20140058677 | METHOD FOR PROCESSING ELECTROMAGNETIC DATA - Methods and computing systems for processing electromagnetic data are disclosed. In one embodiment, a method is disclosed that includes performing a first controlled source electromagnetic survey at a selected area that includes a reservoir zone; performing additional controlled source electromagnetic surveys at the selected area after the first survey; and inverting measurements from the first survey and the additional surveys to identify at least one resistivity change in the reservoir zone after the first survey, wherein during the inversion, respective measured resistivity values from the first survey and respective measured resistivity values from the additional surveys are constrained to be constant, and correspond to one or more areas disposed in the selected area that are outside of the reservoir zone. | 02-27-2014 |
20140056103 | SEISMIC SURVEY COMMUNICATION SYSTEMS AND METHODS - Systems and methods for seismic survey communications. In one implementation, the method may include receiving a first network address to a sensor node. The first network address may correspond to a primary logical path between the sensor node and a recording server. The primary logical path may also include a first router dedicated to the primary logical path. The method may also include receiving a second network address to the sensor node. The second network address may correspond to a secondary logical path between the sensor node and the recording server. The secondary logical path may also include a second router dedicated to the secondary logical path. The method may further include sending seismic data to the recording server using the first network address. | 02-27-2014 |
20140052766 | REPRESENTING A FUNCTION BANDLIMITED WITHIN A POLYGONAL SPACE - Based at least in part on one or more characteristics relating to a measurement system, a polygonal space in a Fourier domain is determined. A representation of a function that is bandlimited within the polygonal space is computed. | 02-20-2014 |
20140043945 | SEISMIC VIBRATORY ACQUISITION METHOD AND APPARATUS - A method and related apparatus are described for generating acoustic signals for use in a vibratory seismic survey, including at least two different sweep signals for the control of at least two different types of vibrators; and matching the phases of the different sweep signals at a transition frequency from one sweep signal to another. | 02-13-2014 |
20140043939 | IMAGING BY EXTRAPOLATION OF VECTOR-ACOUSTIC DATA - Methods for wavefield extrapolation using measurements of a wavefield quantity and a component of the gradient of the wavefield quantity are disclosed. The methods use “exact” representations of scattering reciprocity. The methods can yield “exact”, nonlinear, “true-amplitude” receiver wavefields that are beyond the receiver measurement boundary. Methods of evaluating/validating the extrapolated data are also disclosed. Some methods may also evaluate the accuracy of models for the areas where data are extrapolated or measured. These methods can be used in any industries involving imaging, such as geophysical/seismic exploration, bio-medical imaging, non-destructive remote sensing, acoustic space architecture, design and engineering. | 02-13-2014 |
20140043934 | DATA ACQUISITION - Methods for indirect data acquisition via exact inverse receiver extrapolation. The desired data are obtained from extrapolation of directly measured data containing a wavefield quantity (e.g. pressure) and a component of its gradient. The methods use exact representations of scattering reciprocity. Methods of evaluating/validating the extrapolated data are also disclosed. These methods can be used in any industries involving imaging, such as geophysical/seismic exploration, bio-medical imaging, non-destructive remote sensing, acoustic space architecture, design and engineering. | 02-13-2014 |
20140036626 | ESTIMATING AND USING SLOWNESS VECTOR ATTRIBUTES IN CONNECTION WITH A MULTI-COMPONENT SEISMIC GATHER - A technique includes determining at least one attribute of a slowness vector associated with a seismic gather based on pressure data and an indication of particle motion that is measured by at least one seismic sensor while in tow. | 02-06-2014 |
20140036625 | METHOD FOR OPTIMIZING ACOUSTIC SOURCE ARRAY PERFORMANCE - A technique facilitates obtaining seismic data in a marine environment. An array of acoustic sources is deployed in a marine environment. The array can be utilized for creating acoustic pulses that facilitate the collection of data on subsea structures. The methodology enables optimization of acoustic source array performance to improve the collection of useful data during a seismic survey. | 02-06-2014 |
20140033500 | SOLID SEISMIC STREAMER CABLE AND METHOD - An apparatus includes a streamer cable having one or more seismic devices disposed within a polymer body and about a core. The polymer body includes a channel defined therein for receiving one or more wires connecting the seismic devices. The wires include slack for withstanding the tensional forces experienced by the streamer cable during deployment and operation. Associated methods are also described. | 02-06-2014 |
20140029381 | METHOD AND APPARATUS FOR POSITIONING A CENTER OF A SEISMIC SOURCE - The present invention provides a method and apparatus for positioning a center of a seismic source. The method includes determining a desired center-of-source of the seismic source and selecting one of a first and a second plurality of guns to form the seismic source based upon the desired center-of-source, a center-of-source of the first plurality being different than a center-of-source of the second plurality. | 01-30-2014 |
20140029380 | ACTIVE STEERING FOR MARINE SEISMIC SOURCES - A seismic survey system having a source array ( | 01-30-2014 |
20140029378 | RECONSTRUCTING SEISMIC WAVEFIELDS - A technique includes receiving seismic data acquired in a seismic survey in the vicinity of a reflecting interface. The survey has an associated undersampled direction. The technique includes providing second data indicative of discrete samples of incident and reflected components of a continuous seismic wavefield along the undersampled direction and relating the discrete samples to a linear combination of the continuous incident and reflected seismic wavefields using at least one linear filter. Based on the relationship, an unaliased representation of the linear combination of the continuous incident and reflected seismic wavefields is constructed. | 01-30-2014 |
20140027111 | ACTIVE SEISMIC MONITORING OF FRACTURING OPERATIONS & DETERMINING CHARACTERISTICS OF A SUBTERRANEAN BODY USING PRESSURE DATA AND SEISMIC DATA - A method for managing a fracturing operation. In one implementation, the method may include positioning one or more sources and one or more receivers near a hydrocarbon reservoir; pumping a fracturing fluid into a well bore of the hydrocarbon reservoir; performing a survey with the sources and the receivers during the fracturing operation; comparing the baseline survey to the survey performed during the fracturing operation; analyzing one or more differences between the baseline survey and the survey performed during the fracturing operation; and modifying the fracturing operation based on the differences. | 01-30-2014 |
20140022863 | INTERPOLATION AND/OR EXTRAPOLATION OF SEISMIC DATA - A method of processing seismic data is provided in the seismic data is acquired at a plurality of locations and the method comprises interpolating and/or extrapolating the seismic data, thereby to estimate seismic data at a target location different from the plurality of locations. The interpolating and/or extrapolating the seismic data is performed in a polar co-ordinate system. The method may provide for, among other things, accuracy of estimation; particularly at short offsets from the seismic source. The polar co-ordinate system used may be chosen to approximate the seismic wavefront in an earth model, for example in an earth model in which properties vary only with depth. | 01-23-2014 |
20140022861 | CALIBRATING ROTATION DATA AND TRANSLATIONAL DATA - Rotation data and translational data are received. A calibration operator is determined based on the rotation data and translational data, where the calibration operator is useable to relatively calibrate the rotation data and the translation of data. | 01-23-2014 |
20140010047 | SYSTEMS AND METHODS FOR SEISMIC DATA ACQUISITION EMPLOYING ASYNCHRONOUS, DECOUPLED DATA SAMPLING AND TRANSMISSION - Systems and methods for asynchronously acquiring seismic data are described, one system comprising one or more seismic sources, a plurality of sensor modules each comprising a seismic sensor, an A/D converter for generating digitized seismic data, a digital signal processor (DSP), and a sensor module clock; a seismic data recording station; and a seismic data transmission sub-system comprising a high precision clock, the sub-system allowing transmission of at least some of the digitized seismic data to the recording station, wherein each sensor module is configured to periodically receive from the sub-system an amount of the drift of its clock relative to the high precision clock. This abstract is provided to comply with rules requiring an abstract to ascertain the subject matter of the disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. | 01-09-2014 |
20130343155 | SYSTEM AND TECHNIQUE TO SUPPRESS THE ACQUISITION OF TORQUE NOISE ON A MULTI-COMPONENT STREAMER - A technique includes distributing particle motion sensors along the length of a seismic streamer. Each particle motion sensor is eccentrically disposed at an associated angle about an axis of the seismic streamer with respect to a reference line that is common to the associated angles. The sensors are mounted to suppress torque noise in measurements that are acquired by the particle motion sensors. This mounting includes substantially varying the associated angles. | 12-26-2013 |
20130343153 | MARINE VIBRATOR SWEEPS WITH REDUCED SMEARING AND/OR INCREASED DISTORTION TOLERANCE - A marine seismic survey using one or more moving marine seismic vibrators, where the vibrator sweeping function is based on smearing error criteria and is a downward-sweeping non-criteria linear sweep function. The acquired seismic data can either be used as is without desmearing or desmeared easily. | 12-26-2013 |
20130338922 | DETERMINING AN OUTPUT REPRESENTING A TARGET STRUCTURE BASED ON ENCODED SOURCE AND RECEIVER DATA - A source wavefield is computed from encoded source data calculated by performing encoding of source wavelets with noise. A receiver wavefield is computed from encoded receiver data calculated by encoding of measured receiver data with the noise. An output representing a target structure is determined based on the source wavefield and the receiver wavefield. | 12-19-2013 |
20130336087 | MARINE VIBRATOR SWEEPS - Marine seismic survey using one or more marine seismic vibrators, where the vibrator sweep function is based on a quality requirement, which may be a final image quality requirement or an environmental requirement. The sweep function may be nonlinear and the energy spectrum may not match the energy spectrum of an airgun. | 12-19-2013 |
20130315036 | SENSOR ASSEMBLY - A multiple axis sensor assembly includes an enclosure and encapsulated microelectromechanical system (MEMS) sensors. The encapsulated sensors are disposed inside the enclosure and are mounted in different orientations, which correspond to different axes of the sensor assembly. A controller of the sensor assembly is disposed in the enclosure and electrically coupled to the MEMS sensors. | 11-28-2013 |
20130311100 | MOVEOUT CORRECTION OF SEISMIC DATA - A method of processing seismic data including measurement data and their gradients to obtain gradients of move-out corrected data, comprising deriving gradients of the measurement data, deriving a first term comprising applying a move-out correction function to the measurement data; deriving a second term by applying the move-out correction function to the gradients and deriving gradients of move-out corrected data by adding the first term and the second term. The gradients of move-out corrected data are used to process physical properties of the earth's interior. The method may be used prior to any data processing algorithm which uses measurement gradient data in which move-out correction is applied prior to the algorithm, either because the algorithm makes a zero offset assumption or because it is beneficial for the algorithm to operate on move-out corrected data to reduce aliasing. | 11-21-2013 |
20130294196 | INVERSION USING A FILTERING OPERATOR - To perform inversion to produce a model of a structure, a filtering operator based at least on an angle between a propagating direction of a source wavefield and a propagating direction of a back-propagated receiver wavefield is computed. The filtering operator is used in performing the inversion to produce the model of the structure. | 11-07-2013 |
20130265852 | CONVERTING A FIRST ACQUIRED DATA SUBSET TO A SECOND ACQUIRED DATA SUBSET - Acquired data that corresponds at least in part to a target structure is received. One or more subsets of a first type are formed from the acquired data. The one or more subsets of the first type are converted to one or more subsets of a second, different type. | 10-10-2013 |
20130265849 | METHODS AND DEVICES FOR ENHANCED SURVEY DATA COLLECTION - Methods and computing systems are disclosed for enhancing survey data collection. In one embodiment, a method is performed that includes deploying an array of marine seismic streamers, wherein respective streamers in the array include a plurality of seismic receivers; towing the array of marine seismic streamers; actively steering the array of marine seismic streamers; and while actively steering the array of marine seismic streamers, maintaining a tow-depth profile for the array such that the plurality of seismic receivers are configured to acquire seismic data having a receiver ghost response frequency that varies linearly. | 10-10-2013 |
20130261981 | COVARIANCE ESTIMATION USING SPARSE WAVELET REPRESENTATION - Computing systems and methods are disclosed. In one embodiment, a technique is provided that includes receiving data representing at least in part a structure of interest; and processing the data in a processor-based machine to represent the data as a data structure including a plurality of contiguous data segments and at least one disjoint section, which separates two of the contiguous data segments. The technique includes processing the data structure based at least in part on the disjoint section(s) exhibiting ergodic behavior to determine at least one property of the structure. | 10-03-2013 |
20130261980 | USING CROSSLINE MEASUREMENT DATA FOR AN ACTION RELATING TO SURVEY OF A TARGET STRUCTURE - Methods and systems for survey operations are provided. In some embodiments, crossline measurement data measured by at least one survey receiver is received. Based at least in part on a characteristic of the crossline measurement data, an option from among a plurality of candidate options is selected, where the selected option is for use in an action relating to survey of a target structure. | 10-03-2013 |
20130250723 | SWEEP SEQUENCE DETERMINATION FOR OVERLAPPING SWEEPS - An embodiment of the invention includes combining pseudorandom sweeps with an independent, or nearly independent, survey acquisition technique. Targeted design of pseudorandom sweeps can direct the majority of cross-correlation noise to lie outside key time-lags of the record (i.e., windows of interest). Embodiments of the invention are described herein. | 09-26-2013 |
20130250721 | MARINE SEISMIC SURVEYING EMPLOYING INTERPOLATED MULTICOMPONENT STREAMER PRESSURE DATA - It is described a method of interpolating and extrapolating seismic recordings, including the steps of deriving particle velocity related data from seismic recordings obtained by at least one streamer carrying a plurality of multi-component receivers and using the particle velocity related data to replace higher derivatives of pressure data in an expansion series. | 09-26-2013 |
20130245955 | CORRECTING GEOMETRY-RELATED TIME AND AMPLITUDE ERRORS - A method for predicting a plurality of surface multiples for a plurality of target traces in a record of seismic data acquired in a survey area. The method includes selecting a target trace and identifying two or more desired traces for multiple prediction based on the target trace. After identifying the desired traces, the method identifies one or more recorded traces for each desired trace. Each identified recorded trace is described as being substantially close to one of the desired traces. The method then includes correcting the identified recorded traces for one or more geometry-related effects associated with the survey area and convolving the corrected recorded traces to generate a plurality of convolutions. After convolving the corrected recorded traces, the method then stacks the convolutions. | 09-19-2013 |
20130235701 | METHOD TO DELEGATE ACTIVATION AUTHORITY TO SEISMIC SOURCES DURING OPERATIONS - A seismic survey method including determining an expected time when an actuation step will be performed by a seismic source device, transmitting a signal from the seismic source device to a source control system thereby alerting the source control system of the expected time when the actuation step will be performed by the seismic source device; and in response to the signal from the seismic source device, providing a communication from the source control system to the seismic source device. | 09-12-2013 |
20130235697 | METHODS AND COMPUTING SYSTEMS FOR PROCESSING DATA - Computing systems and methods for processing collected data are disclosed. In one embodiment, a method for iteratively separating a simultaneous-source dataset is provided, wherein the simultaneous-source dataset is used as an input dataset for a first iteration of simultaneous-source separation. The input dataset includes a plurality of shots that include data corresponding to a plurality of source activations. The method of iteratively separating the input dataset includes generating simulated simultaneous shots based on shots separated in the input dataset; and forming an output dataset based on the separated simultaneous shots and the simultaneous-source dataset, wherein the output dataset is configured for use as the input dataset for the next iteration of separating the simultaneous-source dataset. | 09-12-2013 |
20130185040 | PARAMETERIZING A GEOLOGICAL SUBSURFACE FEATURE - A method to parameterize the geometry of a geological, subsurface feature such as a salt body is provided. Data corresponding to a subsurface, geological formation is acquired. The acquired formation data corresponds to a subsurface body having a certain geometry and a subsurface region. At least part of the subsurface body geometry is directly inverted into an inversion domain. The direct inversion includes partitioning the inversion domain into a first partitioned region, corresponding at least in part to the subsurface body, and a second partitioned region. The inversion further uses a level set representation to parameterize the subsurface body geometry. A computing system that includes a processor, a memory, and one or more programs stored in the memory is also provided. The programs comprise instructions that, when executed by the processor, are configured to perform the provided method. | 07-18-2013 |
20130185032 | DETERMINING AN ELASTIC MODEL FOR A GEOLOGIC REGION - A technique includes determining at least one impulse response of a modeling and migration of at least one point scatterer in a target structure and based at least in part on the impulse response(s) and a reflection amplitude image, determining a model for at least part of the target structure. | 07-18-2013 |
20130182538 | REVERSE TIME MIGRATION MODEL DIP-GUIDED IMAGING - Computing systems and methods to producing a reverse time migration model dip-guided image using processed vertical seismic profile data are provided. In one embodiment, vertical seismic profile data for a subsurface geological formation is obtained. One or more dip estimates corresponding to the subsurface geological formation are also obtained. One or more model dip-guided reverse time migration imaging conditions are determined and applied to the obtained vertical seismic profile data to produce the processed vertical seismic profile data. | 07-18-2013 |
20130182536 | WAVEFIELD DEGHOSTING - A technique includes receiving sensor acquired data, which includes pressure data representative of at least one pressure measurement of a wavefield and particle motion data representative of at least one particle motion measurement of the wavefield. The technique includes filtering the pressure data and the particle motion data with a plurality of directional filters to provide a plurality of filtered datasets. The filtered datasets are associated with different directional ranges. The technique includes estimating an angle of incidence for at least one of the directional ranges based at least in part on at least one of the filtered datasets; and processing the acquired data to determine at least one of an upgoing component of the wavefield and a downgoing component of the wavefield based at least in part on the at least one estimated angle of incidence. | 07-18-2013 |
20130182533 | ATTENTUATING NOISE ACQUIRED IN AN ENERGY MEASUREMENT - A technique includes receiving data corresponding to at least one measurement of energy produced by a shot of an energy source; and transforming the received data to a domain that is sensitive to event direction. The technique includes comparing the measurement(s) with a reference based at least in part on the transformation; and based at least in part on the comparison, attenuating noise from the measurement(s). | 07-18-2013 |
20130182532 | PROCESSING COLLECTED SURVEY DATA - A method to perform a marine seismic survey includes obtaining marine seismic data corresponding to a subterranean formation under a water surface. The marine seismic data is generated from an underwater seismic sensor that is subject to an interference effect. The method further includes generating, by a computer processor and using a deconvolution operation, corrected marine seismic data based at least in part on the marine seismic data to compensate for the interference effect, and generating, by the computer processor, a marine seismic survey result based at least in part on the corrected marine seismic data. | 07-18-2013 |
20130177217 | WATER TABLES MAPPING - Described herein are implementations of various technologies for a method for mapping water table depths. In one implementation, a satellite image of an area of interest may be received. The satellite image may comprise a red spectrum, a green spectrum and a blue spectrum. A first map may be generated that identifies only water features on the satellite image. The first map may be convolved with a digital elevation model of the area of interest to generate a second map. The second map may identify elevations of the water features on the satellite image. An interpolation algorithm may be applied to the second map to generate a third map. The third map may identify water tables and elevations for the water tables on the satellite image. | 07-11-2013 |
20130170322 | SYSTEMS AND METHODS FOR MARINE ANTI-FOULING - An anti-biofouling casing for a seismic streamer is described, the anti-biofouling casing comprising a polymer system comprising a hydrophobically-modified base polymer, the hydrophobically-modified base polymer comprising a base polymer having a backbone and a hydrophobically derivatized chain extender coupled to said backbone of said base polymer, wherein the the hydrophobically derivatized chain extender comprises a hydrophobic moiety. The anti-fouling casing comprises a hydrophobic surface the serves to prevent biofouling of the surface. | 07-04-2013 |
20130142013 | SYSTEMS AND METHODS FOR MARINE ANTI-FOULING - An anti-biofouling casing for a seismic streamer is provided, the casing comprising an outer-skin, the outer skin comprising a mix of a base material and a molecular additive, wherein the molecular additive is localized throughout the base material and the molecular additive is configured to impart a high contact angle and/or a low surface energy to an outer surface of the anti-biofouling casing to prevent adhesion of living organism thereto. The outer-skin may comprise a casing/skin for a seismic streamer such that the streamer skin comprises a base material with a hydrophobic molecular additive distributed throughout the streamer skin. | 06-06-2013 |
20130128696 | NOISE REMOVAL FROM 3D SEISMIC REPRESENTATION - A method for removing noise from a three-dimensional representation of seismic data. The method includes receiving seismic data acquired in a seismic survey. The method may organize the acquired seismic data into a three-dimensional representation of the acquired seismic data. The method may then remove a noise from the three-dimensional representation of the acquired seismic data based on at least one criterion. | 05-23-2013 |
20130121108 | ROTATIONAL MOTION COMPENSATED SEISMIC SENSORS AND METHODS OF USE IN SEISMIC DATA ACQUISITION - Apparatus and methods for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, including correcting for the effect of one or more sensor non-linear motions, which improves accuracy of seismic data. One or multiple non-linear movements of the sensor may be corrected for. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. | 05-16-2013 |
20130116928 | ESTIMATING VELOCITIES WITH UNCERTAINTY - A method and apparatus for estimating velocity in a subsurface region. Seismic data for a subsurface region may be received. One or more attributes for the seismic data may be calculated. A posterior distribution may be generated. The posterior distribution may represent one or more probabilities of one or more velocities for the attributes. A velocity with uncertainty may be determined for the subsurface region based on the posterior distribution. A pore pressure with uncertainty may be determined based on the velocity with uncertainty. | 05-09-2013 |
20130107663 | METHODS AND SYSTEMS FOR SURVEY DESIGNS | 05-02-2013 |
20130100767 | SEISMIC ACQUISITION USING SOLID STREAMERS - An embodiment of the disclosed invention includes a method for attenuating noise during acquisition of marine seismic date. The method includes placing a seismic streamer in a body of water. The seismic streamer includes a streamer body having a length and a channel, a seismic sensor disposed within the channel, and a gel disposed within the channel. The gel has a complex viscosity of at least 50 Pascals and includes a concentration of a polymer between the range of about 5% and about 25% by weight. The method also includes placing a source in the body of water. The seismic streamer and the source are towed through the body of water and the source is fired while being towed through the body of water. Data is collected from the seismic streamer as it is towed through the body of water. | 04-25-2013 |
20130100763 | Seismic Data Acquisition and Source-Side Derivatives Generation and Application - The technologies described herein include systems and methods for performing a first seismic survey and performing a second seismic survey after a predetermined amount of time has lapsed between the first seismic survey and the second seismic survey. The shot times and the shot positions of the second seismic survey may be substantially the same as the shot times and the shot positions of the first seismic survey. After performing the seismic surveys, seismic data generated by the first seismic survey may be processed to generate a first image, and seismic data generated by the second seismic survey may be processed to generate a second image. After generating the first and second images, a difference between the first image and the second image may be computed to generate a time lapse difference image. | 04-25-2013 |
20130100762 | SEISMIC DATA ACQUISITION AND SOURCE-SIDE DERIVATIVES GENERATION AND APPLICATION - The technologies described herein include systems and methods for performing a first seismic survey and performing a second seismic survey after a predetermined amount of time has lapsed between the first seismic survey and the second seismic survey. The shot times and the shot positions of the second seismic survey may be substantially the same as the shot times and the shot positions of the first seismic survey. After performing the seismic surveys, seismic data generated by the first seismic survey may be processed to generate a first image, and seismic data generated by the second seismic survey may be processed to generate a second image. After generating the first and second images, a difference between the first image and the second image may be computed to generate a time lapse difference image. | 04-25-2013 |
20130060476 | PROCESSING GEOPHYSICAL DATA - The present invention relates to a method of processing seismic data and other geophysical data such as acoustic or electromagnetic data. In particular the method is applicable to seismic data extrapolation and migration techniques such as, for example, one-way and two-way wave-equation migration. The method comprises determining, in the space-time domain, an integral of the product of a kernel and a function of the geophysical data over an integration domain from the values of the function at a plurality of discrete data points within the integration domain by defining a plurality of cells in the integration domain, each vertex of a cell being at a respective one of the data points; obtaining an interpolant of the function over a selected cell using local interpolation; and integrating, in the space-time domain, the product of the kernel and the interpolant for the selected cell. | 03-07-2013 |
20130051176 | SEISMIC ACQUISITION USING SOLID STREAMERS - Some embodiments of the disclosed invention include a method for acquiring marine seismic data using solid streamers in a curved pattern. Streamers can be towed in a curved pattern within a body of water. While being towed in the curved patter the source may be fired and response data can be collected by the streamers as they are towed through the water in the curved/circular pattern. These streamers can be solid streamers and can be filled with a gel like substance. Moreover, the streamers can be placed at various known depths within the body of water. | 02-28-2013 |
20130039153 | SYSTEMS AND METHODS FOR MARINE ANTI-FOULING - An anti-biofouling casing for a seismic streamer is described, the anti-biofouling casing including a polymer system having a hydrophobically-modified base polymer, the hydrophobically-modified base polymer including a base polymer having a backbone and a hydrophobically derivatized chain extender coupled to the backbone of the base polymer. The polymer system including between about 0.1% and 10% of the hydrophobically derivatized chain extender by weight. The anti-fouling casing including a hydrophobic surface that serves to prevent biofouling of the surface. | 02-14-2013 |
20130000893 | ACTIVE SEISMIC MONITORING OF FRACTURING OPERATIONS - A method for managing a fracturing operation. In one implementation, the method may include positioning a seismic source and at least one seismic receiver near a hydrocarbon reservoir; pumping a fracturing fluid into a well bore of the hydrocarbon reservoir such that the fracturing fluid may include an additive that enhances acoustic impedance between the fracturing fluid and subsurface formations in which the hydrocarbon reservoir is located and that produces a foam; performing a seismic survey with the seismic source and the at least one seismic receiver during the fracturing operation; and identifying locations of the fracturing fluid within subsurface formations in which the hydrocarbon reservoir is located. | 01-03-2013 |
20120321809 | SYSTEMS AND METHODS FOR MARINE ANTI-FOULING - An anti-biofouling material for use on marine equipment is described, the anti-biofouling material comprising a polymer system comprising a hydrophobically-modified base polymer, the hydrophobically-modified base polymer comprising a base polymer having a backbone and a hydrophobically derivatized chain extender coupled to said backbone of said base polymer, wherein the hydrophobically derivatized chain extender comprises a hydrophobic moiety. The anti-fouling casing comprises a hydrophobic surface that serves to prevent biofouling of the surface. | 12-20-2012 |
20120314536 | ENHANCING LOW FREQUENCY CONTENT IN MARINE SIMULTANEOUS VIBROSEIS ACQUISITION - A technique is designed for conducting a seismic survey. The technique utilizes a plurality of vibrator arrays employed to conduct a seismic survey utilizing low frequency and high frequency vibrators in each vibrator array. The plurality of vibrator arrays continuously sweeps low frequency signals via low frequency vibrators. While sweeping low frequency signals, high-frequency vibrators emit high-frequency signals in an alternating pattern between vibrator arrays to enhance the seismic survey. | 12-13-2012 |
20120281501 | ESTIMATING A PROPERTY BY ASSIMILATING PRIOR INFORMATION AND SURVEY DATA - Prior information describing a distribution of values of a parameter relating to physical characteristic of a target structure is received. Acquired survey data of the target structure is received. Using a probabilistic technique, the prior information and the survey data is assimilated to produce an estimated property of the target structure. | 11-08-2012 |
20120275264 | REMOVING FREE-SURFACE EFFECTS FROM SEISMIC DATA ACQUIRED IN A TOWED SURVEY - A technique includes towing a spread of at least one streamer to acquire seismic data in response to energy produced by a seismic source. The technique includes towing the seismic source at least 100 meters behind a front end of the spread to configure the spread to acquire a split spread gather record. | 11-01-2012 |
20120271609 | METHODS AND COMPUTING SYSTEMS FOR HYDROCARBON EXPLORATION - Methods and computing systems for hydrocarbon exploration are disclosed. In one embodiment, an integrated petroleum systems model is generated for an area of interest, wherein the integrated petroleum systems model is based on: a geological outline, a set of satellite remote sensing data, and a set of airborne remote sensing data. | 10-25-2012 |
20120221182 | CONTROLLING MOVEMENT OF A VESSEL TRAVELING THROUGH WATER DURING A SEISMIC SURVEY OPERATION - To perform control of movement of a marine vessel traveling through water during a seismic survey operation, input information relating to factors that affect a speed of the marine vessel is received. The speed of the marine vessel is adjusted in response to the received information relating to the factors that affect the speed of the marine vessel. | 08-30-2012 |
20120218860 | METHOD FOR OPTIMIZING ACOUSTIC SOURCE ARRAY PERFORMANCE - A technique facilitates obtaining seismic data in a marine environment. An array of acoustic sources is deployed in a marine environment. The array can be utilized for creating acoustic pulses that facilitate the collection of data on subsea structures. The methodology enables optimization of acoustic source array performance to improve the collection of useful data during a seismic survey. | 08-30-2012 |
20120209530 | INTERBED MULTIPLE PREDICTION - A method and apparatus for predicting interbed multiples is described herein. Trace geometries may be generated for one or more desired shot-side traces, one or more desired receiver-side traces, and one or more desired interbed multiple generator traces, for a first target trace. A first set of reflections at the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired interbed multiple generator traces. A second set of reflections below the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired shot-side traces. A third set of reflections below the interbed multiple generator layer may be extracted from one or more recorded traces closest to the desired receiver-side traces. The interbed multiples for the first target trace may be estimated based on the first set, the second set, and the third set. | 08-16-2012 |
20120095689 | PROCESSING SEISMIC DATA - A method of processing seismic data acquired consequent to actuation of a seismic source is described. The method comprises taking the result of the following process into account when processing the seismic data where the process comprises estimating the effect of uncertainty in the position and/or orientation of the seismic source relative to the measuring receiver on processing the seismic data by estimating a source wavefield from data acquired by a near-field measuring receiver and from a first parameter set including at least one parameter indicative of the position and/or orientation of the seismic source relative to the measuring receiver, varying the value of at least one parameter of the first parameter set, estimating the source wavefield from the data acquired by the measuring receiver and from the varied first parameter set and obtaining information about the uncertainty in the estimate of the source wavefield. | 04-19-2012 |
20120087207 | PROCESSING SEISMIC DATA - A method of monitoring a marine seismic source array comprises, consequent to actuation of a seismic source array ( | 04-12-2012 |
20120075950 | PROCESSING SEISMIC DATA - Embodiments of the invention provide a method of processing marine seismic data, the data having been acquired using a “dense over/sparse under” streamer array having N over streamers disposed at a first depth and M under streamers disposed at a second depth greater than the first depth, where 003-29-2012 | |
20120072115 | DETERMINATION OF NOTIONAL SIGNATURES - A method of determining the signature of a seismic source array comprises determining a notional signature of at least one source of an array of n seismic sources from measurements of the emitted wavefield from the array made at 2n independent locations and from the relative positions of the sources of the array and the 2n independent locations. The notional signature of a source may be determined from the difference (or some other function) of the measurements of the emitted wavefield made by the two sensors associated with that source. | 03-22-2012 |
20120069702 | MARINE SEISMIC SURVEY SYSTEMS AND METHODS USING AUTONOMOUSLY OR REMOTELY OPERATED VEHICLES - Systems and methods for carrying out seismic surveys and/or conducting permanent reservoir monitoring with autonomous or remote-controlled water vehicles, including surface and submersible vehicles, are described. Additional methods carried out by autonomous or remote-controlled water vehicles and associated with seismic surveys further described. | 03-22-2012 |
20120063265 | SEISMIC ACQUISITION AND FILTERING - Designing a multi-dimensional Finite Impulse Response FIR digital filter to attenuate the coherent noise while preserving reflection signals on seismic data, particular in land seismics, comprises computing filter coefficients to minimise an l-norm function of differences between a response of a filter with the computed coefficients and a predetermined response which attenuates signals outside a predetermined range of slowness relative to signals within the predetermined range of slowness. Additional constraints may be imposed on the coefficients to improve the attenuation of signals outside the predetermined range of slowness of the desired reflection signals, and/or to improve uniformity within the desired range. | 03-15-2012 |
20120033527 | FAST 3-D SURFACE MULTIPLE PREDICTION - A method and apparatus for predicting a plurality of surface multiples for a plurality of traces in a record of seismic data. In one embodiment, the method includes providing a plurality of target traces at a nominal offset and a nominal azimuth; selecting a plurality of pairs of input traces, wherein the midpoints of the input traces in each pair are separated by half the nominal offset and the azimuth of a line connecting the midpoints of the input traces in each pair is equal to the nominal azimuth; convolving the selected pairs of input traces to generate a plurality of convolutions; and applying a three dimensional operator to the convolutions. | 02-09-2012 |
20110317516 | SEISMIC STREAMER PLATFORM - A technique includes designing a streamer, which includes a cable and seismic sensors based at least in part on a relationship between vibration noise and a bending stiffness of the cable. | 12-29-2011 |
20110122725 | POSITION DETERMINATION OF A SEISMIC SOURCE ARRAY - A method of obtaining information about the positions of sources in a marine seismic source array, comprises: determining respective notional signatures for m selected seismic sources, where m05-26-2011 | |
20110122724 | POSITION DETERMINATION OF A SEISMIC SOURCE ARRAY - A method of obtaining information about the positions of sources in a marine seismic source array that has N seismic sources, including at least N | 05-26-2011 |
20110063946 | MARINE SEISMIC ACQUISITION SYSTEM - A marine cable for seismic surveys is described with a plurality of ceramic pressure sensors arranged in groups of at least two pressure sensors with a group output being representative of the vertical pressure gradient at the group location, and an inclinometric system including one or more transducers for determining the orientation of the sensors of the group in order to determine their true vertical separation. | 03-17-2011 |
20110060528 | NOISE ATTENUATION OF SEISMIC DATA - The present invention relates to a method of filtering seismic data for noise attenuation. An embodiment of the present invention provides a method of processing seismic data in which the seismic data is transformed into an f-x domain using a discrete Fourier transform and is then filtered at each discrete frequency using an infinite impulse response (HR) filter. | 03-10-2011 |
20110038227 | SEISMIC DATA PROCESSING METHOD FOR SURFACE RELATED MULTIPLE ATTENUATION - An embodiment of the invention relates to a method of processing seismic data comprising a plurality of traces, each trace having a source position, a receiver position and a midpoint position, each having coordinates in an inline direction and a crossline direction. The invention uses a data set comprising traces having one of the source position, the receiver position or the midpoint position having coordinates which are invariant in one of the inline or the crossline directions. A non-iterative surface related multiple attenuation algorithm is applied to the data set which assumes substantial non-variation of depth of reflectors in the same one of the inline or the crossline directions. | 02-17-2011 |
20110017543 | METHOD AND SYSTEM FOR SELECTING PARAMETERS OF A SEISMIC SOURCE ARRAY - A method for selecting parameters of a seismic source array comprising a plurality of source elements each having a notional source spectrum is described, the method comprising calculating a ghost response function of the array; calculating directivity effects of the array; and adjusting the parameters of the array such that the directivity effects of the array are compensated by the ghost response to minimize angular variation of a far field response in a predetermined frequency range. A method for determining a phase center of a seismic source array is also related, the method comprising calculating a far field spectrum of the array at predetermined spherical angles, and minimizing the phase difference between the farfield spectra within a predetermined frequency range by adjusting a vertical reference position from which the spherical angles are defined. | 01-27-2011 |
20100329078 | INTERPOLATION AND/OR EXTRAPOLATION OF SEISMIC DATA - A method of processing seismic data is provided in the seismic data is acquired at a plurality of locations and the method comprises interpolating and/or extrapolating the seismic data, thereby to estimate seismic data at a target location different from the plurality of locations. The interpolating and/or extrapolating the seismic data is performed in a polar co-ordinate system. The method may provide for, among other things, accuracy of estimation; particularly at short offsets from the seismic source. The polar co-ordinate system used may be chosen to approximate the seismic wavefront in an earth model, for example in an earth model in which properties vary only with depth. | 12-30-2010 |
20100312481 | MOVEOUT CORRECTION OF SEISMIC DATA - A method of processing seismic data including pressure data and pressure gradient data to obtain gradients of moveout corrected pressure data, comprising applying a move-out correction function to the pressure gradient data; and adding a correction term dependent on a moveout corrected time-derivative of the pressure data and a spatial derivative of the moveout correction function. The method may be used prior to any data processing algorithm which uses pressure gradient data in which moveout correction is applied prior to the algorithm, either because the algorithm makes a zero offset assumption or because it is beneficial for the algorithm to operate on moveout corrected data to reduce aliasing. | 12-09-2010 |
20100302909 | SEISMIC SENSOR DEVICES - A sensor device ( | 12-02-2010 |
20100299069 | SPATIAL INTERPOLATION OF IRREGULARLY SPACED SEISMIC DATA - A method for spatially interpolating pressure values of seismic data uses known values of pressure and spatial derivatives of pressure at a plurality of irregularly spaced locations along the direction of interpolation. The interpolation preferably uses an interpolation operator calculated by assuming that an interpolated pressure value comprises a linear combination of the known pressure values at locations x | 11-25-2010 |
20100008185 | METHOD TO ACQUIRE SIMULTANEOUSLY SEISMIC DATA WITH SOURCE ARRAYS DESIGNED FOR SPECIFIC TARGETS - A method and apparatus for acquiring seismic data. In one embodiment, the method includes: moving a first air gun array in the water at a first depth and a second air gun array in the water at a second depth greater than the first depth, in which the total volume of the first air gun array is less than the total volume of the second air gun array, in which the first air gun array is separated from the second air gun array by a distance substantially equal to a shot point interval, firing seismic energy through the first and second air gun arrays through the water into the earth, and recording seismic signals reflected from strata in the earth beneath the water. | 01-14-2010 |
20090080288 | METHOD FOR CORRECTING INPUT SEISMIC TRACES FROM DISSIPATIVE EFFECTS - A method and apparatus for correcting an input seismic trace. The method includes receiving the input seismic trace and creating a t by Q gather using the input seismic trace, where t represents traveltime, Q represents absorption parameter, and the t by Q gather has traveltime as the vertical axis and a ratio of t and Q as the horizontal axis. The ratio of t and Q is referred to as R. The method further includes applying an interpolation algorithm to the t by Q gather to derive a corrected input seismic trace. | 03-26-2009 |
20090080287 | Method for Estimating Absorption Parameter Q(T) - A method and apparatus for a method for generating an estimated value of absorption parameter Q(t). In one embodiment, the method includes receiving an input seismic trace, applying a time variant Fourier transform to the input seismic trace to generate a time variant amplitude spectrum of the input seismic trace, dividing the natural logarithm of the time variant amplitude spectrum by −πf, and performing a power series approximation to the result with an index starting from one to generate an estimated value of R(t). R(t) is a ratio between traveltime t and the absorption parameter Q(t). The method further includes dividing t by R(t) to generate the estimated value of the absorption parameter Q(t). | 03-26-2009 |
20090043545 | Processing Data Representing Energy Propagating Through A Medium - The present invention relates to a method of processing data representing energy propagating through a medium (e.g., acoustic, elastic or electromagnetic energy) and describes an efficient and flexible e approach to forward modeling and inversion of such energy for a given medium. The representation theorem for the wave-equation is used, in combination with time-reversal invariance and reciprocity, to express the Green's function between two points in the interior of the model as an integral over the response in those points due to sources regularly distributed on a surface surrounding the medium and the points. | 02-12-2009 |
20080304359 | Processing Seismic Data - A method of processing seismic data including convolving at least first and second seismic data traces or respective portions of at least first and second seismic data traces to forma composite trace. The travel time of an event may then be determined in the composite trace. This provides an improved method compared to the prior art technique of picking the travel time of an event individually in each one of a number of seismic data traces and averaging the individual picked travel times. | 12-11-2008 |
20080225641 | Multi-Component Seismic Data Processing - There is described a method of moveout or velocity analysis of seismic signals using the steps of obtaining such signals | 09-18-2008 |