| Entries |
| Document | Title | Date |
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| 20100088034 | SYSTEM AND METHOD FOR DERIVING SEISMIC WAVE FIELDS USING BOTH RAY-BASED AND FINITE-ELEMENT PRINCIPLES - A system and method approximate a set of wave equations describing the propagation of seismic waves of one or more frequencies through a seismic volume of interest. In one embodiment, a ray-based initial beam solution is determined that describes the propagation of seismic waves at a first frequency through the seismic volume of interest as a set of one or more beams. Based on the ray-based initial beam solution, a refined finite-element beam solution is determined that describes the propagation of the seismic waves at the first frequency through the seismic volume of interest by approximating the two-way wave equation with a one-way wave equation. | 04-08-2010 |
| 20090259405 | METHODS, SYSTEMS, AND COMPUTER-READABLE MEDIA FOR GENERATING SEISMIC EVENT TIME HISTORIES - Methods, systems, and computer-readable media generate acceleration time histories. An initial acceleration history is applied to a response model with natural frequencies across a spectrum of interest to develop a displacement response. Low-frequency enhancement signals are determined by comparing the displacement response to a standard displacement response. The enhancement signals are combined with the initial acceleration history to develop a second acceleration history, which is applied to the response model to develop an acceleration response. High-frequency enhancement signals are determined by comparing the acceleration response to a standard acceleration response. The enhancement signals are combined with the second acceleration history to develop a desired acceleration history. Acceleration histories also may be created by adding random phase angles at various frequencies to an initial acceleration history in the frequency domain, which is then converted to the time domain and scaled to generate a low-correlation history. | 10-15-2009 |
| 20110196613 | METHOD OF CHARACTERIZING A CO2 PLUME IN A GEOLOGICAL STORAGE AQUIFER - A method of monitoring a CO | 08-11-2011 |
| 20110202278 | MULTI-FUNCTION BROADBAND PHASED-ARRAY SOFTWARE DEFINED SONAR SYSTEM AND METHOD - A software defined platform is provided for subsea acoustic applications that utilizes a broadband phased array transducer and a configurable, multi-function software defined transducer that is configurable on the fly to enable various subsea acoustic systems to be achieved in a single unit thus reducing the space required on the vessel and the cost of having such multiple functions. | 08-18-2011 |
| 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 |
| 20130041589 | PASSIVE MONITORING METHOD FOR SEISMIC EVENTS - The invention concerns a passive monitoring method to detect the presence of and characterize a micro-seismic event ( | 02-14-2013 |
| 20130090857 | Tensor-Based Method For Representation, Analysis, and Reconstruction of Seismic Data - Method for representing seismic data as a spatially varying, second-order tensor field ( | 04-11-2013 |
| 20130090858 | SYSTEM FOR MEASURING COSEISMIC MOVEMENTS OR VIBRATIONS OF STRUCTURES BASED ON GLOBAL NAVIGATION SATELLITE SYSTEMS-GNSS AND/OR PSEUDOLITES - System for measuring coseismic movements or vibrations of structures based on measurements of phase observations performed on at least four sources simultaneously, between GNSS satellites and/or pseudolites, for couples of consecutive timepoints (t,t+1) temporally separated by not more than one second. | 04-11-2013 |
| 20090093964 | MULTI-DIMENSIONAL PARAMETER IDENTIFICATION METHOD AND DEVICE: APPLICATION TO THE LOCATION AND RECONSTRUCTION OF DEEP ELECTRICAL ACTIVITIES BY MEANS OF SURFACE OBSERVATIONS - A method is provided for identifying multidimensional parameters of a plurality of P>1 sources of interest present in a predetermined multidimensional conductive environment by a plurality of observations ( | 04-09-2009 |
| 20090093963 | METHOD FOR QUANTITATIVE EVALUATION OF FLUID PRESSURES AND DETECTION OF OVERPRESSURES IN AN UNDERGROUND MEDIUM - Method for evaluating fluid pressures in an underground zone by means of seismic and well data. The zone studied is divided into several time analysis intervals. For each of these intervals, a pre-stack stratigraphic inversion of the seismic data is then carried out using geological a priori information, and a lithoseismic facies cube is determined by lithoseismic analysis. Then, for each facies, relations connecting the seismic impedances of wells to differential pressures in wells are determined in each analysis interval. Finally, a differential pressure cube is determined using the previous relations, as well as a confining pressure cube, in order to determine the fluid pressures in the subsoil by simple difference between these two cubes. Application: petroleum sphere for the detection of overpressure zones during drilling for example. | 04-09-2009 |
| 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 |
| 20080275649 | Method for Optimal Wave Field Separation - A technique for decomposing a recorded wave field represented in a set of multicomponent, marine seismic data centers around a computer-implemented method including: estimating the statistics of the noise terms in each one of a predetermined group of seismic measurements in a seismic data set acquired in a marine survey; modeling the physical propagation of a recorded wave field represented in the seismic data set from the estimated statistics; and estimating a directional component of the recorded wave field from the physical propagation model that minimizes error relative to the seismic measurements. | 11-06-2008 |
| 20090012712 | Assisted Seismic Measuring System Including GPS Receivers - A system for analyzing three-dimensional seismic data includes a plurality of digitizer units, each with a configuration of geophones, a data recording and control center, a base GPS receiver with an associated antenna with a substantially unrestricted view of the sky and at the respective digitizer units low-power slave GPS receivers that acquire and track GPS satellite signals using tracking assistance information provided by the base GPS receiver. The slave GPS receivers use the tracking assistance information to acquire and track GPS satellite signals that may be relatively weak at the receivers, due to conditions at the site, such as foliage canopies and so forth. The system processes range information provided by the slave GPS receivers over an extended period of time. In this way, the precise positions of the respective slave GPS receivers, and thus, the digitizer units, can be calculated, even if the slave GPS receivers are able to observe and collect data from sets of two or more satellites for only three or four relatively short time intervals at various sky positions during the extended period. The slave GPS receivers then locally produce for the digitizer units timing signals that are based on the GPS codes and synchronized across the system. If a given slave GPS receiver cannot, at a given time, track any GPS satellite signals, a nearby slave GPS receiver supplies the timing information required for the geophone data gathering operations. | 01-08-2009 |
| 20110022322 | PROSPECT STRESS PREDICTION - A method is provided for obtaining a quantitative prediction of a magnitude of a maximum horizontal stress (S | 01-27-2011 |
| 20090037115 | METHOD FOR DETERMINING SEISMIC DATA QUALITY - The present invention determines seismic data quality for a plurality of locations within a seismic survey for a geologic or geophysical region of interest. The present invention additionally includes generating correlation coefficients which relate to the seismic data quality so that the seismic data quality can be incorporated into geostatistical analyses associated with decisions that are based in part on the seismic survey. | 02-05-2009 |
| 20110046884 | SEISMIC ATTRIBUTES FOR STRUCTURAL ANALYSIS - Embodiments of methods and systems for analysis of geological structures using seismic attributes are described. In some embodiments, a method includes computing a similarity function using one or more seismic attributes at a location within the geological structure along an I direction and a J direction; computing a total optimal similarity function in at least one plane defined by the I and J directions; computing a minimum possible value of the total similarity function for a defined range of rotations; and calculating a discontinuity measure based at least partially on the minimum possible value of the total similarity function. | 02-24-2011 |
| 20100318299 | SYNCHRONIZING A SEISMIC DATA ACQUISITION NETWORK - Described herein are implementations of various technologies for a method for configuring a seismic data acquisition network. A first message may be received from a first node of the seismic data acquisition network over a first direct communication link. The first message may comprise a first precision quality of a first reference clock to which the first node may be synchronized. A second message may be received from a second node of the seismic data acquisition network over a second direct communication link. The second message may comprise a second precision quality of a second reference clock to which the second node may be synchronized. One of the first precision quality and the second precision quality may be determined to have a higher precision quality. A real time clock may be synchronized to one of the first reference clock and second reference clock having the higher precision quality. | 12-16-2010 |
| 20090099778 | SEISMIC DATA PROCESSING WORKFLOW DECISION TREE - Implementations of various technologies for a method for modifying a seismic data processing workflow. In one implementation, the method may include displaying the seismic data processing workflow in a hierarchical structure. The hierarchical structure may have one or more branches and one or more nodes. Each branch may represent a parameter value. Each node may represent a data output of a seismic data process performed with the parameter value. A selection of a node may be received. A graphical representation of the data output for the selected node may be displayed. | 04-16-2009 |
| 20120035852 | PROCESSING SEISMIC DATA - A method of processing multi-component seismic data is provided that comprises determining, in the time-offset domain, a first partition rate for a first event from the multi-component seismic data. Information about near-receiver properties of the earth may be obtained from the first partition rate. The method may further comprise determining, in the time-offset domain, at least a second partition rate for the first event from the multi-component seismic data and/or at least a third partition rate for a second event. Further information about near-receiver properties of the earth can be obtained from the second and/or third partition rate. | 02-09-2012 |
| 20100100330 | METHODS AND SYSTEMS FOR ACQUIRING AND PROCESSING SEISMIC DATA - Methods and systems are provided for acquiring seismic data. An ambient electromagnetic signal having a known time dependence is transmitted for propagation within a survey area. The ambient electromagnetic signal is received at distinct geographic locations with independently operating data acquisition units positioned at the distinct locations. Data representing acoustic signals received from the Earth at the distinct geographic locations are collected with the data acquisition units. The collected acoustic signals for the distinct geographic locations are synchronized by correlating the known time dependence of the propagated electromagnetic signal with time dependencies of the collected acoustic signals. | 04-22-2010 |
| 20080275650 | METHOD OF AND APPARATUS FOR PROCESSING SEISMIC DATA - A method of processing seismic data that includes including first and second modes of seismic energy where the second mode has been generated by partial mode conversion of the first mode at a boundary face of a layer of the seabed includes the step of cross-correlating a trace acquired at a receiver and including events corresponding to the first mode with a trace acquired at the same receiver and including events corresponding to the second mode. An event in the cross-correlated data that corresponds to partial mode conversion is identified, and the amplitude of this event is normalized, for example relative to the amplitude of the peak in the cross-correlogram at zero time delay. Information about the effects of the static shift produced by the layer and/or about vector infidelity can be arrived from normalized cross-correlograms for receivers in a receiver array. | 11-06-2008 |
| 20080228403 | Technique to Provide Seismic Data-Based Products - A technique includes providing a pricing scheme to sell at least one seismic data-based product. The seismic data-based product(s) are generated from seismic data that is obtained from at least one sensor in tow, and the seismic data includes particle motion data, which the pricing scheme excludes from being sold. | 09-18-2008 |
| 20080228402 | Processing of Seismic Data Acquired Using Twin Over/Under Streamers - A method for processing seismic data acquired using a first over/under streamer and a second over/under streamer. In one implementation, the method may include estimating seismic data that would have been acquired by a third over/under streamer disposed at a depth equivalent to a distance separating the first over/under streamer from the second over/under streamer; and applying a dephase and sum algorithm to seismic data acquired by the first over/under streamer and the second over/under streamer and the estimated seismic data. | 09-18-2008 |
| 20080294345 | METHOD FOR DETERMINING ATTRIBUTES ASSOCIATED WITH NET-SAND THICKNESS - The present invention provides a method for determining net-sand thickness and net-reservoir volume over a broad range of gross sand thickness in a target zone. A net-resource attribute is designed to estimate net-sand thickness based upon the inner product of the determined probe function and the segment of the seismic trace that includes the target zone. The net-resource attribute and the geographic location for each trace can be stored and a net-resource table may be created. Maps and net-reservoir volume can be generated from the geographical location information and the net-resource attributes. Net-sand thickness allows the determination of the total volume of sand and thus the size of the hydrocarbon container or the net-reservoir volume. | 11-27-2008 |
| 20100145622 | EVENT-BASED POWER MANAGEMENT FOR SEISMIC SENSORS - A method of event-based power management for seismic sensors is disclosed. The method comprises measuring seismic activity with a seismic sensor and comparing the measured seismic activity from the seismic sensor against at least one criteria. When the measured seismic activity does not satisfy the at least one criteria, a signal processing circuit is maintained in a deactivated state. When the measured seismic activity satisfies the at least one criteria, the signal processing circuit is activated to analyze the measured seismic activity. The signal processing circuit enters a functional mode based on analyzing the measured seismic activity. | 06-10-2010 |
| 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 |
| 20100004869 | Vibration Isolation Device, Arithmetic Apparatus, Exposure Apparatus, and Device Manufacturing Method - An arithmetic apparatus connected to a communication net connected to a vibration isolation device. The apparatus includes a reception unit that receives seismic information via the communication net from a seismic observation device, an estimation unit that estimates seismic vibration which will arrive at the vibration isolation device, on the basis of the seismic information received by the reception unit, and a transmission unit that transmits information on the seismic vibration estimated by the estimation unit to the vibration isolation device via the communication net. | 01-07-2010 |
| 20090024328 | PROCESSING SEISMIC DATA USING INTERFEROMETRY TECHNIQUES - Method for processing seismic data. In one implementation, the method includes converting a common midpoint (CMP) gather of seismograms into one or more interferogram common midpoint (ICMP) gathers, generating a semblance spectrum for each ICMP gather, stacking the semblance spectrum from each ICMP gather to generate a combined semblance spectrum and deriving a normal moveout (NMO) velocity profile from the combined semblance spectrum. | 01-22-2009 |
| 20110231100 | ROTATIONAL SEISMOMETER FOR NEAR-FIELD MEASUREMENTS - A rotational seismometer having a housing that encases an optical lever having a light source for emitting a beam of light through a slit defined by the optical lever that is focused by a lens for focusing the beam of light to a balance bob suspended within the housing is disclosed. The balance bob includes a mirror secured to a plate attached to the housing through an arrangement that includes a thin fiber attached to a stiff wire such that the stiff wire bends and the thin wire does not bend when a tilt motion is applied to the rotational seismometer. | 09-22-2011 |
| 20090204330 | SYSTEM AND METHOD FOR USING TIME-DISTANCE CHARACTERISTICS IN ACQUISITION, PROCESSING, AND IMAGING OF T-CSEM DATA - There is provided herein a system and method of acquiring, processing, and imaging transient Controlled Source ElectroMagnetic (t-CSEM) data in ways that are similar to those used for seismic data. In particular, the instant invention exploits the time-distance characteristics of t-CSEM data to permit the design and execution of t-CSEM surveys for optimal subsequent processing and imaging. The instant invention illustrates how to correct t-CSEM data traces for attenuation and dispersion, so that their characteristics are more like those of seismic data and can be processed using algorithms familiar to the seismic processor. The resulting t-CSEM images, particularly if combined with corresponding seismic images, may be used to infer the location of hydrocarbon reservoirs. | 08-13-2009 |
| 20090222210 | Method for determining the earthquake protection of buildings - According to the invention, in the method for determining the earthquake protection of buildings, the natural frequency of a building is determined. Moreover, the natural frequency of the ground surrounding the building is determined. Thereafter, a rating value for the building is calculated based on a comparison of the natural frequency of the building to the natural frequency of the ground. Based on this rated value, the earthquake protection of a building can be determined. Preferably, a failure probability for the building and an average damage to the building are calculated on the basis of the rating value, depending on the magnitude of the earthquake. | 09-03-2009 |
| 20090192718 | SUBSURFACE PREDICTION METHOD AND SYSTEM - A method of predicting subsurface properties of a geologic formation includes acquiring seismic data for a subsurface region including the geologic formation of interest, computing seismic attributes of the measured seismic data over at least part of this geologic formation, determining internally consistent rock properties representative of the geologic formation, generating models of the same part of the geologic formation with these rock properties, computing synthetic seismic data from the models, computing the same attributes from these synthetic seismic data, and using Bayesian analysis to predict, from the probability of modeled attributes given the models, the probability of the actual subsurface properties given the measured attributes. | 07-30-2009 |
| 20090240438 | System and method for migrating seismic data - A system and method that enable the processing of seismic data. In one embodiment, a system comprises a plurality of processing nodes and a server. The plurality of processing nodes are configured to process seismic data for migration. The server is operatively linked to each of the plurality of processing nodes to enable communication between the server and the processing nodes. The server may manage a set of stored beam tables that can be accessed by the processing nodes in order to process seismic data. | 09-24-2009 |
| 20100161230 | Method For Predicting Differences In Subsurface Conditions - A method for predicting differences in subsurface conditions useful in 4D applications. In an example embodiment of the method, at least one layer is defined in a data volume representing a first subsurface condition such as shale volume fraction ( | 06-24-2010 |
| 20120197532 | EXTRACTING GEOLOGIC INFORMATION FROM MULTIPLE OFFSET STACKS AND/OR ANGLE STACKS - Geologic information may be extracted from multiple offset stacks and/or angle stacks. Offset stacks and/or angle stacks may be received that represent energy that has propagated through a geologic volume of interest from energy sources to energy receivers. Attribute volumes associated with individual source-receiver offsets and/or source-receiver angles may be determined based on corresponding offset stacks and/or angle stacks. For individual offset stacks or angle stacks, corresponding sets of geologic features represented in the attribute volumes may be identified. The sets of geologic features corresponding to the different offset stacks and/or angle stacks to may be compared to determine discrepancies and/or similarities between the sets of geologic features corresponding to the different offset stacks and/or angle stacks. Stratigraphic interpretations, stratigraphic predictions, and/or other interpretations and/or predictions may be determined based on causes of the discrepancies and/or similarities. | 08-02-2012 |
| 20120197531 | EXTRACTING GEOLOGIC INFORMATION FROM MULTIPLE OFFSET STACKS AND/OR ANGLE STACKS - Geologic information may be extracted from multiple offset stacks and/or angle stacks. Offset stacks and/or angle stacks may be received that represent energy that has propagated through a geologic volume of interest from energy sources to energy receivers. Attribute volumes associated with individual source-receiver offsets and/or source-receiver angles may be determined based on corresponding offset stacks and/or angle stacks. For individual offset stacks or angle stacks, corresponding sets of geologic features represented in the attribute volumes may be identified. The sets of geologic features corresponding to the different offset stacks and/or angle stacks to may be compared to determine discrepancies and/or similarities between the sets of geologic features corresponding to the different offset stacks and/or angle stacks. Stratigraphic interpretations, stratigraphic predictions, and/or other interpretations and/or predictions may be determined based on causes of the discrepancies and/or similarities. | 08-02-2012 |
| 20100262372 | MICROSEISMIC EVENT MONITORING TECHNICAL FIELD - A microseismic monitoring system includes a seismic sensor positioned proximate to a wellbore traversing a formation; an orientation source producing an orientation shot; a hydraulic apparatus operationally connected with the formation to produce a fracture in the formation; a computer control system operationally connected with a database of known spectral attributes for event categories; and a computer readable medium that carries instructions executable by the computer control system that, when executed: receive data from the seismic sensor; select an event of interest from the data received; determine a spectral estimate of the selected event of interest; compare the determined spectral estimate of the selected event of interest to the known spectral estimates; and select from the data received by the seismic source the orientation shot for orientation of the seismic sensor. | 10-14-2010 |
| 20080215246 | MEASURING AND MODIFYING DIRECTIONALITY OF SEISMIC INTERFEROMETRY DATA - Methods and apparatuses are disclosed for replacing the individual receivers used with a seismic interferometry process with an array of seismic receivers and then manipulating the array data in order to measure and modify the typical non-uniform directionality function of the background seismic energy. The non-uniform directionality function is a significant cause of noise with seismic interferometry. Furthermore, the array of receivers may be used to significantly enhance the preferred reflection energy and damp undesirable near surface energy. The directionality function may be modified by using an array of receivers for the virtual source location of seismic interferometry to measure the non-uniform directionality function, generating multiplication factors, and applying the multiplication factors to convert the measured directionality function into a desired directionality function. | 09-04-2008 |
| 20120197530 | EXTRACTING GEOLOGIC INFORMATION FROM MULTIPLE OFFSET STACKS AND/OR ANGLE STACKS - Geologic information may be extracted from multiple offset stacks and/or angle stacks. Offset stacks and/or angle stacks may be received that represent energy that has propagated through a geologic volume of interest from energy sources to energy receivers. Attribute volumes associated with individual source-receiver offsets and/or source-receiver angles may be determined based on corresponding offset stacks and/or angle stacks. For individual offset stacks or angle stacks, corresponding sets of geologic features represented in the attribute volumes may be identified. The sets of geologic features corresponding to the different offset stacks and/or angle stacks to may be compared to determine discrepancies and/or similarities between the sets of geologic features corresponding to the different offset stacks and/or angle stacks. Stratigraphic interpretations, stratigraphic predictions, and/or other interpretations and/or predictions may be determined based on causes of the discrepancies and/or similarities. | 08-02-2012 |
| 20100235102 | TECHNIQUE AND SYSTEM TO PROCESS A SEISMIC SIGNAL TO DETERMINE AN ATTRIBUTE OF A GEOLOGICAL LAYER - A technique includes receiving seismic data indicative of a signal, which is produced by the interaction of reflection interfaces with a source wavelet. The reflection interfaces are associated with boundaries of a geological layer. The technique includes processing the seismic data to determine at least one slope change in the source wavelet caused by the interaction. The technique includes determining an attribute of the layer based at least in part on the determined slope change(s). | 09-16-2010 |
| 20090043511 | Assisted Seismic Measuring System Including GPS Receivers - A system for analyzing three-dimensional seismic data includes a plurality of digitizer units, each with a configuration of geophones, a data recording and control center, a base GPS receiver with an associated antenna with a substantially unrestricted view of the sky and at the respective digitizer units low-power slave GPS receivers that acquire and track GPS satellite signals using tracking assistance information provided by the base GPS receiver. The slave GPS receivers use the tracking assistance information to acquire and track GPS satellite signals that may be relatively weak at the receivers, due to conditions at the site, such as foliage canopies and so forth. The system processes range information provided by the slave GPS receivers over an extended period of time. In this way, the precise positions of the respective slave GPS receivers, and thus, the digitizer units, can be calculated, even if the slave GPS receivers are able to observe and collect data from sets of two or more satellites for only three or four relatively short time intervals at various sky positions during the extended period. The slave GPS receivers then locally produce for the digitizer units timing signals that are based on the GPS codes and synchronized across the system. If a given slave GPS receiver cannot, at a given time, track any GPS satellite signals, a nearby slave GPS receiver supplies the timing information required for the geophone data gathering operations. | 02-12-2009 |
| 20100211324 | AUTOMATED STRUCTURAL INTERPRETATION - Embodiments of automated structural interpretation are described. In some embodiments, a method includes identifying one or more object points belonging to an object to be tracked; tracking a trajectory of the one or more object points, including: calculating a plurality of etalons around at least one of the one or more object points using one or more different angular parameters; selecting one or more candidate points for evaluation; extracting one or more samples from around the one or more candidate points; and evaluating a next trajectory location of the one or more object points based at least partially on the one or more samples and one or more of the plurality of etalons. | 08-19-2010 |
| 20100211320 | RECONSTRUCTING A SEISMIC WAVEFIELD - A technique to reconstruct a seismic wavefield includes receiving datasets, where each dataset is indicative of samples of one of a plurality of measurements of a seismic wavefield that are associated with a seismic survey. The technique includes modeling the plurality of measurements of a seismic wavefield as being generated by the application of at least one linear filter to the seismic wavefield. The technique includes processing the datasets based on the linear filter(s) and a generalized matching pursuit technique to generate data indicative of a spatially continuous representation of the seismic wavefield. | 08-19-2010 |
| 20100211323 | METHOD OF REPRESENTING SEISMIC SIGNALS - There is provided a method of interpolating wave signals, particularly seismic signals acquired through a seismic survey, using the steps of obtaining time series of measured wave signals; and selecting iteratively basis functions to represent said measured signals with a basis function being fully defined by n parameters, wherein in each iteration one or more basis functions are combined with the selected basis functions such that the residual between the measured signals and a representation of the measured signal by the combined basis functions is minimized at the locations of the measurement at each iteration. | 08-19-2010 |
| 20100211322 | INTERPOLATING A PRESSURE WAVEFIELD ALONG AN UNDERSAMPLED DIRECTION - A technique includes receiving seismic data acquired in a seismic survey. The survey has an associated undersampled direction, and the seismic data contains samples, which are indicative of a pressure wavefield and a directional derivative of the pressure wavefield that contains information related to vertical variations. The technique includes relating the samples to the pressure wavefield or to the directional derivative of the pressure wavefield using at least one linear filter and based on the relationship, constructing a substantially unaliased continuous representation of the pressure wavefield or the directional derivative of the pressure wavefield along the undersampled direction. | 08-19-2010 |
| 20100211319 | 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. | 08-19-2010 |
| 20090319190 | SYSTEM AND METHOD FOR SEISMIC TRACE ANALYSIS - Seismic data are processed to reduce or eliminate aliasing due, for example to sparse or irregular sampling. An iterative method includes an inhibiting function used in conjunction with a function evaluating a magnitude of Fourier coefficients that together act to reduce the effects of aliased energies and preferentially select true energies. Computational steps are conducted primarily in k-space, without returning to x-space, thereby reducing computational costs. | 12-24-2009 |
| 20090112477 | Correction for Errors Caused by Variation in Water Conditions - Method for processing seismic data to correct for errors caused by variation in water conditions. In one implementation, the method may include (a) applying a dip correction to a plurality of observed water bottom reflection times using a model water velocity and an estimate of geologic dip; (b) applying a normal moveout (NMO) correction to the dip corrected observed water bottom reflection times using the model water velocity; (c) applying a common mid point (“CMP”) bin centering correction to the NMO corrected, dip corrected observed water bottom reflection times using the model water velocity and the estimate of geologic dip; (d) solving for Δs | 04-30-2009 |
| 20090037114 | 4D+ PRESTACK SEISMIC DATA STRUCTURE, AND METHODS AND APPARATUS FOR PROCESSING 4D+ PRESTACK SEISMIC DATA - Methods, apparatus and products for processing 4D+ prestack seismic data having the form of 3D prestack gathers, single fold 3D volumes, and a mapping table to link the gathers and the volumes coherently. | 02-05-2009 |
| 20110035154 | UTILIZING SALTS FOR CARBON CAPTURE AND STORAGE - Aspects of the invention include methods of contacting carbon dioxide with an aqueous mixture. In practicing methods according to certain embodiments, a subterranean brine may be contacted with carbon dioxide to produce a reaction product, which may or may not be further processed as desired. Also provided are methods in which a brine or minerals are contacted with an aqueous composition. Aspects of the invention further include compositions produced by methods of the invention as well as systems for practicing methods of the invention. | 02-10-2011 |
| 20110118984 | METHOD AND SYSTEM FOR RETRIEVING SEISMIC DATA FROM A SEISMIC SECTION IN BITMAP FORMAT - A computer implemented method for retrieving seismic data from a seismic section provided in a bitmap format. The method includes reconstructing a two dimensional matrix of seismic interpolated data in which a value at a given pixel in the matrix is proportional to local density of wiggles in the seismic section with an added value of a previously calculated pixel. The method may be implemented in either of computer hardware configured to perform said method and computer software embodied in a non-transitory, tangible, computer-readable storage medium. Also disclosed are corresponding computer program product and data processing system. | 05-19-2011 |
| 20100017138 | SYSTEM HAVING A NETWORK CONNECTED TO MULTIPLE DIFFERENT TYPES OF SURVEY SENSORS - A system includes a network, multiple different types of survey sensors connected to the network, and a controller connected to the network. The multiple different types of survey sensors are configured to communicate different types of measurement data over the network to the controller. | 01-21-2010 |
| 20100131205 | METHOD FOR IDENTIFYING AND ANALYZING FAULTS/FRACTURES USING REFLECTED AND DIFFRACTED WAVES - A method for fault and fracture identification based on seismic data representing a geological section using dispersion properties of reflected and diffracted waves. The method includes scanning N parameters associated with the seismic data. The array includes the coordinate axes of the angle of emergence (β), the radius of curvature of the wave front (R) and either time or depth samples. The method also includes processing the N parameters, generating a new image having a cross-sectional shape associated with one of the reflected and diffracted waves, calculating parameters DS and LS, evaluating DS for the case of fracture characterization, and comparing, for the case of fault identification, parameter LS with a threshold value defining the type of wave as one of the reflected and diffracted wave, the cross-sectional shape being substantially circular for the reflected wave, and being elliptical for the diffracted wave. | 05-27-2010 |
| 20100057367 | PROCESSING SEISMIC DATA IN COMMON GROUP-CENTER GATHERS - A method for processing seismic data. The method includes plotting a travel-time curve and one or more actual times that each seismic receiver receives one or more seismograms on a graph. The travel-time curve represents an approximate time that each seismic receiver in a seismic survey area receives the seismograms. The method may further include determining a residual static shift for each seismogram and using the residual static shift to estimate a time shift correction. The residual static shift represents a difference between an actual time in which a seismic receiver received a seismogram and a time on the travel-time curve that corresponds to the actual time. The time shift correction corrects a timing error in the time indicated by the travel-time curve. | 03-04-2010 |
| 20110251797 | METHOD OF MONITORING A GEOLOGICAL GAS STORAGE SITE BY STRATIGRAPHIC INVERSION OF SEISMIC DATA - A method of monitoring an underground formation into which a gas is injected or from which a gas is produced, by a stratigraphic inversion of seismic data with anamorphosis of impedances. Pre-injection and post-injection seismic data are acquired. A pre-injection seismic impedance cube IP | 10-13-2011 |
| 20110098932 | METHOD AND APPARATUS FOR DETECTING PEDESTRIANS - Detection of at least one object causing a signal of interest. In one embodiment, a method of detecting at least one object causing a persistent non-random pressure wave comprises: providing a digital signal representation of the pressure wave that includes respective amplitudes of the signal, in at least two different frequencies, and providing a detection indication based on a measured similarity between the respective amplitudes over time. | 04-28-2011 |
| 20110082645 | VARIABLE GRID FOR FINITE DIFFERENCE COMPUTATION - A computer system and a computer-implemented method for evaluating a geophysical model using a grid of points representing locations in a subsurface geological region are disclosed. The method includes storing a geophysical model of the subsurface geological region in a computer readable memory and defining, for the geophysical model, the grid of points representing the locations in the subsurface geological region. The grid of points comprise a plurality of points extending in at least one direction. The plurality of points are variably spaced apart in the at least one direction. The method further includes evaluating, by the computer, the geophysical model using the grid of points. | 04-07-2011 |
| 20100318298 | IN-FIELD CONFIGURATION OF LAND SURVEY SENSORS - Described herein are implementations of various technologies for a method for in-field configuration of land survey sensors. One or more planned positions of the sensors may be received. One or more actual positions of the sensors be determined. The actual positions may be sent to the sensors while the sensors are powered off. | 12-16-2010 |
| 20110213556 | SYSTEM AND METHOD FOR LOCAL ATTRIBUTE MATCHING IN SEISMIC PROCESSING - There is provided herein a New system arid method of local attribute match filtering which operates in the local attribute domain via the use of complex wavelet transform technology. This approach is adaptable to address various noise types in seismic data and, more particularly, is well suited to reduce the noise in geophone data as long as an associated hydrophone signal is relatively noise-free. | 09-01-2011 |
| 20110022321 | METHOD FOR MONITORING A SUBTERRANEAN FRACTURE - The Invention relates to a method for monitoring a subterranean fracture, comprising determining by means of a plurality of seismic wave detectors ( | 01-27-2011 |
| 20110046885 | METHOD OF AND APPARATUS FOR EXPLORING A REGION BELOW A SURFACE OF THE EARTH - A passive method for exploring a region below the surface of the earth. The method comprises using a plurality of sensors to obtain seismic data obtained by recording ambient seismic interface waves in a frequency range whose lower limit is greater than 0 Hz, and whose upper limit is less than or equal to substantially 1 Hz. The sensors may be sensitive to three orthogonal components. Recordings may be made simultaneously by all sensors and normalization of data is unnecessary. The sensors may be moved and clean data may be selected. Local dispersion curves may be determined to improve vertical resolution. The data are processed so as to obtain a measure of the energy in a frequency band within the frequency range. The energy measure may be calculated by integrating the spectrum in the frequency domain over a desired frequency range. The resulting calculated energy provides information about the region of the earth being explored. | 02-24-2011 |
| 20110125407 | Apparatus and Method for Integrating Survey Parameters into a Header - A method, apparatus and system for acquiring seismic data is disclosed that in one aspect receives a seismic signal detected by at least one sensor in response to a seismic energy signal generated by a source at a selected location at a data acquisition unit in data that is in data communication with the sensor, receives at least one parameter of the source and/or receiver at the data acquisition unit; and generates a data block at the data acquisition unit having data representative of the received seismic signal and a header that contains data representative of the at least one parameter of the source and/or receiver. 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. | 05-26-2011 |
| 20110125406 | SYSTEM AND METHOD FOR ATTENUATING MULTIPLES IN SEISMIC DATA THAT ACCOUNTS FOR BEAM AZIMUTH - The present invention incorporates the use of model-driven and data-driven methodologies to attenuate multiples in seismic data utilizing a prediction model which includes multiply-reflected, surface-related seismic waves. The present invention includes beam techniques that account for beam azimuth, and convolving a predicted multiples beam with a segment of a modeled pegleg beam to obtain a convolved multiples beam. The convolved multiples beam can then be deconvolved to attenuate the multiples that are present in the original input beam. | 05-26-2011 |
| 20090093965 | DETERMINING FAULT TRANSMISSIVITY IN A SUBTERRANEAN RESERVOIR - To determine fault transmissivity in a subterranean reservoir, fault structures in the subterranean reservoir are identified, and elastic impedance data is computed from well log data and seismic data. Normalization parameters that have a predetermined orientation with respect to the identified fault structures are computed, and elastic impedance flux values are normalized with respect to the normalization parameters, where the normalized elastic impedance flux values are indicative of transmissivities of fault structures in the subterranean structure. | 04-09-2009 |
| 20090299638 | Method for Predicting the Best and Worst in a Set of Non-Unique Solutions - Method for determining best and worst cases for values of model parameters such as porosity and shale volume fraction generated by non-unique matrix inversion of physical data such as seismic reflection amplitudes. The matrix is diagonalized, and then orthonormal basis vectors associated with insignificant diagonal elements are used to generate upper and lower bounds on the solution. Best and worst case solutions are determined as linear combinations of the null basis vectors, where the expansion coefficients are determined by making a best fit to the upper and lower bounds. | 12-03-2009 |
| 20090292475 | Time-Space Varying Spectra for Seismic Processing - A method and visualization apparatus for spectral analysis of time-and-space varying signals enables high resolution investigation of 3D seismic data for the exploration of oil and gas. The method extrapolates multi-resolution short windows into an average long window then computes its FFT. Extrapolation uses the continuity relationship between data inside and outside of short windows. Applications of the method are illustrated with graphical screen 3D volume displays of amplitude spectra, dip and azimuth, curvature and faults (figure below). Aside from high resolution these displays improve the productivity of a seismic interpreter. | 11-26-2009 |
| 20110191032 | INTERPOLATION OF PERIODIC DATA - A method for interpolating data. The method includes receiving data acquired at one or more locations where the data represents subterranean formations in the earth. The method also includes selecting one or more of the locations such that the selected locations are within a vicinity of an interpolation location. Next, the method includes forming a matrix of interpolation coefficients based on a first function having one or more interpolation variables, a bandwidth for an interpolation operator and one or more differences between the selected locations, wherein at least one of the interpolation variables is periodic. The method then includes forming a differences vector based on a second function having the interpolation variables, the bandwidth and one or more differences between the selected locations and the interpolation location. Using the matrix of interpolation coefficients and the differences vector, the method then forms an interpolation operator vector by applying an inverse of the matrix of interpolation coefficients to the differences vector. The method then estimates a data value for the interpolation location using the interpolation operator vector. | 08-04-2011 |
| 20100030478 | ANALYSIS SYSTEM, ANALYSIS METHOD, PROGRAM AND MACHINE DEVICE - According to the present invention, an analysis system constructed as a rheology model of a foundation-ground system that is capable of expressing a frequency dependent dynamic spring by using elements with non-frequency-dependent coefficients may be provided. The analysis system according to the present invention is a model for reproducing dynamical characteristics of a system including the foundation and the ground. The analysis system includes an elastic element, a damper element for damping vibration, and a reaction force generation element that generates reaction force proportional to relative acceleration of both ends thereof. The analysis system is constructed as a base system in which the elastic element, the damper element and the reaction force generation element are connected in parallel. Also, the analysis system may include at least one core system provided with any of two elements among the elastic element, the damper element and the reaction force generation element connected in parallel, and a remaining element connected serially thereto. And the base system and at least one core system may be connected in parallel to construct the analysis system. | 02-04-2010 |
| 20100017139 | Low-power satellite-timed seismic data acquisition system - A recording system and method for conducting seismic surveys including cordless battery-operated digital recorders, each employing an integral global positioning system receiver that is only periodically enabled for the purpose of establishing synchronized acquisition clock signals among all the recorders. The satellite receiver adjustment cycle is varied depending on past acquisition clock accuracy and temperature changes. A time stamp is recorded with the digitized seismic data in non-volatile memory. The memory is sized to allow extended periods of operation. Each recorder preferably includes a low-power system timer that may be used as a timer to remotely turn on and off the recorders according to a pre-programmed schedule to conserve power when the system is not in use. Electronic components are idled or de-energized when not needed. | 01-21-2010 |
| 20090259406 | CONTINUOUS MICROSEISMIC MAPPING FOR REAL-TIME 3D EVENT DETECTION AND LOCATION - A method for the detection and localization of microseismic events is proposed which operates in real-time. It provides hypocenters in three spatial dimensions along with an estimate of the event origin time. Sensor positions may be distributed in 3D space, and are not confined to linear arrays in vertical wells. The method combines and improves two existing approaches. For detection and localization purposes the method makes use of the generalized beam-forming and forward modeling properties defined in the “CMM” algorithm. For location refinement, the method uses a stabilized version of the generalized “Geiger” approach. | 10-15-2009 |
| 20090271118 | Method for Obtaining Porosity and Shale Volume From Seismic Data - Method for obtaining rock parameters such as porosity and vshale directly from inversion of seismic data corresponding to a single trace location. This method is distinguished from existing methods that obtain elastic properties from inversion of seismic data, then relate the elastic parameters to rock lithology parameters such as porosity or vshale because it is accomplished in one step, can incorporate anisotropy and does not require multiple trace locations for stability. The data are separated into partial stacks, and a wavelet is specified for each stack. A set of linearized equations are constructed relating seismic reflectivity to changes in elastic parameters, and another set of linearized equations is constructed relating the changes in elastic parameters to the lithologic parameters. The linearized reflectivity equations are combined with the linearized rock physics equations, convolved with the specified wavelets, and equated to the seismic data. The resulting matrix equations are then inverted and a solution is obtained for all offsets simultaneously. | 10-29-2009 |
| 20090048784 | 3D SURFACE RELATED MULTIPLE ELIMINATION FOR WIDE AZIMUTH SEISMIC DATA - According to a preferred aspect of the instant invention, there is provided herein a system and method for the imaging and monitoring of the subsurface hydrocarbon reservoirs and other subsurface features, wherein the collected seismic data contain multiples therein. In brief, the instant invention is a method of removing multiples using SRME, wherein wide azimuth seismic data are used to directly compute a multiple prediction via a mixed space-wavenumber-frequency domain implementation. | 02-19-2009 |
| 20110313671 | SYSTEM AND METHOD FOR DETECTING ROCK FALL - Aspects of the invention provide systems and methods for using ballast sensors to detect rock fall events in a vicinity of railway tracks or similar roadways or tracks. The ballast sensors are spaced apart from the tracks. Particular embodiments permit the use of signals from the ballast sensors to discriminate rock fall events from other types of events and to detect the hypocenter of a rock fall event. | 12-22-2011 |
| 20120004850 | SYSTEM AND METHOD FOR MIGRATING SEISMIC DATA - A system and method that enable the processing of seismic data. In one embodiment, a system comprises a plurality of processing nodes and a server. The plurality of processing nodes are configured to process seismic data for migration. The server is operatively linked to each of the plurality of processing nodes to enable communication between the server and the processing nodes. The server may manage a set of stored beam tables that can be accessed by the processing nodes in order to process seismic data. | 01-05-2012 |
| 20120004849 | EFFICIENT WINDOWED RADON TRANSFORM - One or more computer-readable media including computer-executable instructions to instruct a computing system to define a Radon transform convolution mask; specify an angle that defines a line extending at least partially across a pixel image; and apply the mask successively to target pixels on the line to compute a statistical value for each of the target pixels where application of the mask identifies a set of pixels for computing the statistical value and where each successive application of the mask identifies a set of pixels that includes at least one pixel of a prior set and at least one pixel not included in the prior set to thereby reduce requirements for computing the statistical values. Various other apparatuses, systems, methods, etc., are also disclosed. | 01-05-2012 |
| 20130013212 | SEISMIC CLOCK TIMING CORRECTION USING OCEAN ACOUSTIC WAVES - A method for identifying clock timing discrepancies in at least one clock of interest that is associated with a marine seismic receiver, comprises collecting from at least one marine receiver other than the receiver of interest a first data set corresponding to a selected time period, said first data set being selected to include ocean wave signals; collecting from the receiver of interest a second data set corresponding to the selected time period, said second data set being selected to include ocean wave signals; applying a mathematical prediction technique to the ocean wave signals in the first data set so as to generate a predicted response for a receiver co-located with the receiver of interest; comparing the predicted response to the second data set so as to generate a correlation data set; and using the correlation data set to determine a corrected parameter for the receiver of interest. | 01-10-2013 |
| 20110093202 | SYSTEMS AND METHODS FOR MONITORING AND DETECTING AN EVENT - A system for monitoring and detecting an event. A position determining unit configured to receive a position determining signal. A seismic event detector configured to detect a seismic event and generate a seismic event signal. A storage unit configured for storing position information corresponding to the position determining signal, the storage of the position information occurs in a first manner. A storage unit manager configured to alter the first manner of the storing the position information upon a receipt of the seismic event signal. | 04-21-2011 |
| 20120072116 | EXTRACTION OF DEPOSITIONAL SYSTEMS - A process that assists with the identification of potential hydrocarbon deposits that includes performing a structural interpretation of a three-dimensional seismic volume, transforming the three-dimensional seismic volume into a stratal-slice volume, performing a stratigraphic interpretation of the stratal-slice volume which includes the extracting of bounding surfaces and faults and transforming the stratal-slice volume into the spatial domain. As illustrated in FIGS. | 03-22-2012 |
| 20120130644 | ELECTRICAL METHODS SEISMIC INTERFACE BOX - The present invention relates to a method and apparatus for evaluating the geometry of a fracture. | 05-24-2012 |
| 20100094559 | PSEUDO LOGS TO IMPROVE STRATIGRAPHIC CORRELATION BETWEEN SEDIMENTARY BASINS - In order to improve the tie between depositionally equivalent beds relative to two or more basins detected within a multi dimensional seismic volume of interest, pseudo logs based on the average of attributes derived from seismic impedance where the compaction trend is not present are created for each basin. The mean is taken over all available azimuths, following the structural variations of introduced micro layers. The correlation between the pseudo log relative to each basin enable a more reliable interpretation between the different basins from which sound exploration decision can be made. Such a process has been successfully applied to seismic data acquired in deep water environment. | 04-15-2010 |
| 20120123684 | SYSTEM AND METHOD FOR GENERATING MICRO-SEISMIC EVENTS AND CHARACTERIZING PROPERTIES OF A MEDIUM WITH NON-LINEAR ACOUSTIC INTERACTIONS - A method and system includes generating a first coded acoustic signal including pulses each having a modulated signal at a central frequency; and a second coded acoustic signal each pulse of which includes a modulated signal a central frequency of which is a fraction d of the central frequency of the modulated signal for the corresponding pulse in the first plurality of pulses. A receiver detects a third signal generated by a non-linear mixing process in the mixing zone and the signal is processed to extract the third signal to obtain an emulated micro-seismic event signal occurring at the mixing zone; and to characterize properties of the medium or creating a 3D image of the properties of the medium, or both, based on the emulated micro-seismic event signal. | 05-17-2012 |
| 20120130643 | IDENTIFYING INVALID SEISMIC DATA - A method for processing seismic data. The method may include (1) receiving seismic data acquired by an i | 05-24-2012 |
| 20100174490 | Seismic Detection in Electricity Meters - An arrangement for recording seismic events includes an electricity meter sensor circuit, a digital processing circuit, and an accelerometer operably connected to the digital processing circuit. The accelerometer is configured to provide signals representative of seismic information to the digital processing circuit. A memory is configured to store data records relating to at least some of the seismic information. | 07-08-2010 |
| 20120173150 | SENSOR-BASED SYSTEMS AND METHODS FOR ASSESSING INTERNAL BRIDGE DECK DETERIORATION - An interior volume of a bridge deck is probed using a transportable sensor system that produces deck data useful for assessing internal degradation of the bridge deck. Geographic position data of sensor system positioning is produced as the sensor system traverses the deck. The deck data is associated with the one or more deck locations using the geographic positioning data, and adjusted deck data is generated using adjustment data indicative of external factors that influence the deck data but are unrelated to a failure mechanism impacting the bridge deck interior. An output may be generated comprising at least the adjusted deck data. | 07-05-2012 |
| 20100299070 | METHOD FOR SEPARATING INDEPENDENT SIMULTANEOUS SOURCES - This is a method of separating simultaneous sources that uses an inversion-type approach. Each source will preferably activated at a random time with respect to the others. These random delays tend to make the interference between sources incoherent while the reflections create coherent events within a series of shots. The shot separation is performed via a numerical inversion process that utilizes the sweeps for each shot, the start times of each shot, and the coherence of reflection events between nearby shots. Implementation of this method will allow seismic surveys to be acquired faster and cheaper. | 11-25-2010 |
| 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 |
| 20100274492 | DETERMINING ATTRIBUTES OF SEISMIC EVENTS - A technique includes receiving seismic data, which are acquired by a seismic sensor. The seismic data are indicative of an observed wavefield quantity that is associated with a seismic event. The technique includes determining a candidate event for an observed wavefield quantity based at least in part on a ghost model, a source wavelet and a candidate value for at least one directional attribute quantity of the seismic event; correlating the candidate event with the observed wavefield quantity; and determining an event time based on the correlating. | 10-28-2010 |
| 20120253681 | SYSTEM AND METHOD FOR PROCESSING SEISMIC DATA - A computer-implemented method for processing seismic data includes the determining, from the seismic data, a first amplitude attribute map at a first image depth corresponding to a shallow attenuating body, and a second amplitude attribute map at a second image or target depth. The first and second amplitude attribute maps are then normalized, and a ratio map is determined based on a ratio of the normalized first and second amplitude attribute maps. The ratio map is scaled to yield a scale factor map, which is then applied to the seismic data to compensate for effects of shallow overburden attenuation. | 10-04-2012 |
| 20120316791 | SYSTEM AND METHOD FOR SEISMIC DATA INVERSION BY NON-LINEAR MODEL UPDATE - A system and computer-implemented method for determining properties of a subsurface region of interest from seismic data is disclosed. An embodiment of the method performs full waveform inversion by non-linear model update to compute a velocity model. The method includes obtaining actual seismic data representative of the subsurface region and an initial earth property model for the subsurface region, performing forward modeling using the initial earth property model to create modeled seismic data with similar acquisition specifications as the actual seismic data, calculating a residual between the actual seismic data and the modeled seismic data in a time or transform domain, and inverting the residual to generate a model produced by non-linear model update components. The system includes a data source, user interface, and processor configured to execute computer modules that implement the method. | 12-13-2012 |
| 20120316790 | SYSTEM AND METHOD FOR DATA INVERSION WITH PHASE EXTRAPOLATION - A system and computer-implemented method for inverting data from an area of interest to determine physical properties of the area of interest is disclosed. The method includes transforming the data into a Fourier frequency domain to obtain frequency domain data wherein the frequency domain data includes an amplitude portion and a phase portion, performing phase unwrapping of the phase portion of the frequency domain data to generate an unwrapped phase portion of unwrapped data, extrapolating the unwrapped phase portion to create extrapolated unwrapped data, and inverting the extrapolated unwrapped data to determine the physical properties of the area of interest. The data inverted may be, for example, seismic data or synthetic aperture radar data. The system includes a data source, an user interface, and a processor configured to execute computer modules designed to implement the method. | 12-13-2012 |
| 20120265445 | STABLE SHOT ILLUMINATION COMPENSATION - Various embodiments provide a system and a shot illumination compensation method implemented on a computer system for imaging a subsurface formation. The method includes receiving, by the computer system, seismic data produced by an acoustic energy source and reflected by the subsurface formation; and generating, by the computer system, an image of the subsurface formation based on the seismic data and a spatially varying damping parameter. | 10-18-2012 |
| 20120283953 | LINE AND EDGE DETECTION AND ENHANCEMENT - Embodiments of the present disclosure include one or more of a method, computing device, computer-readable medium, and system for statistical line and edge detection and/or enhancement. An example embodiment of the present disclosure may include a method that includes identifying a plurality of data values related to a first object defined by a first plurality of points within the volume, wherein the first object intersects a second object defined by a second plurality of points within the volume; calculating a statistical significance statistic related to the second object; interpolating a P-value related to the statistical significance statistic; and determining a significant P-value taken over the second object, wherein the significant P-value comprises a minimum P-value that provides a maximum negative log(P(statistical significance statistic)). | 11-08-2012 |
| 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 |
| 20110320129 | SHOT GATHER DATA BEAMER AND DEBEAMER - Beamed data can be obtained from shot gather data, and debeamed data can be obtained from beamed data. Shot gather data for a geophysical volume of interest in a first domain and/or beamed data in a third domain may be received. The first domain has a component relating to seismic wave propagation time and a spatial component relating to lateral spacing. The third domain has a component relating to local plane wave arrival time at a beam center surface location and a component relating to plane wave arrival directions. Data may be transformed between the first domain and a second domain. The second domain has a frequency component and a spatial component corresponding to the spatial component of the first domain. Data may be weighted and/or deweighted in the second domain using a weighting function. A forward transform may be applied to weighted shot gather data in the first domain to obtain beamed data in the third domain. A reverse transform may be applied to beamed data in the third domain to obtain weighted debeamed data in the first domain. | 12-29-2011 |
