Entries |
Document | Title | Date |
20080247271 | SEISMIC SENSOR WITH RAIN NOISE SHIELD - A seismic sensor includes a seismic energy detector having a case configured to be affixed to the ground. A portion of the case above the ground surface is exposed. An energy distributing shield is affixed directly to the exposed portion of the case. A method for seismic data acquisition includes affixing a plurality of spaced apart seismic sensors to the ground surface. Each of the sensors includes a shield affixed directly to an exposed portion of the sensor. The shield is made from an energy distributing material. At selected times a seismic energy source is actuated. Signals generated by each of the seismic sensors are recorded individually. | 10-09-2008 |
20090027999 | Method and apparatus for continuous land based seismic data monitoring and acquisition - A seismic exploration method and unit comprised of continuous recording, self-contained wireless seismometer units or pods. The self-contained unit may include a tilt meter, a compass and a mechanically gimbaled clock platform. Upon retrieval, seismic data recorded by the unit can be extracted and the unit can be charged, tested, re-synchronized, and operation can be re-initiated without the need to open the unit's case. The unit may include an additional geophone to mechanically vibrate the unit to gauge the degree of coupling between the unit and the earth. The unit may correct seismic data for the effects of crystal aging arising from the clock. Deployment location of the unit may be determined tracking linear and angular acceleration from an initial position. The unit may utilize multiple geophones angularly oriented to one another in order to redundantly measure seismic activity in a particular plane. | 01-29-2009 |
20090238038 | VIBROSEIS CALIBRATION TECHNIQUE AND SYSTEM - A technique includes operating a seismic vibrator, including driving the seismic vibrator at different frequencies and driving forces. The technique includes monitoring a parameter affected by the operation of the seismic vibrator during the frequency sweep and based at least in part on the monitored parameter, determining a maximum driving force profile for the seismic vibrator. | 09-24-2009 |
20090238039 | Method and Program for Fracture Plane Reconstruction - The invention relates to a method for fracture plane reconstruction in a three-dimensional set ( | 09-24-2009 |
20100039892 | APPARATUS FOR SEISMIC DATA ACQUISITION - A seismic exploration method and unit comprised of continuous recording, self-contained wireless seismometer units or pods. The self-contained unit may include a tilt meter, a compass and a mechanically gimbaled clock platform. Upon retrieval, seismic data recorded by the unit can be extracted and the unit can be charged, tested, re-synchronized, and operation can be re-initiated without the need to open the unit's case. The unit may include an additional geophone to mechanically vibrate the unit to gauge the degree of coupling between the unit and the earth. The unit may correct seismic data for the effects of crystal aging arising from the clock. Deployment location of the unit may be determined tracking linear and angular acceleration from an initial position. The unit may utilize multiple geophones angularly oriented to one another in order to redundantly measure seismic activity in a particular plane. | 02-18-2010 |
20100080081 | METHOD AND APPARATUS FOR SEISMIC EXPLORATION - The disclosure identifies method and apparatus for seismic exploration which may be used to provide improved positioning of land-based seismic sources in an array. Also described are methods which make use of the improved positioning to allow, in some examples, improved direction or distribution of the energy beam resulting from actuation of the sources. Some methods make use of the described techniques to steer the energy beam; and in some cases at each source or a distribution location, multiple shots will be taken to distribute the beam in multiple orientations relative to the central source point. | 04-01-2010 |
20110032797 | Magnetic mass-lift impulsive seismic energy source including attracting and repulsing electromagnets - A seismic energy source includes a base plate and a block fixedly coupled in a frame. The base plate is configured for contact with a part of the Earth's subsurface to be seismically energized. The frame has a first electromagnet associated therewith. A second electromagnet is disposed in a travelling reaction mass, which is movably disposed in the frame between the first electromagnet assembly and the top block. The reaction mass includes at least a third electromagnet associated therewith. The source has circuits for selectively energizing the first, second and at least a third electromagnets, and which are configured to energize the first and second electromagnets to repel each other such that the traveling reaction mass is lifted from the first electromagnet, and configured to energize the at least a third electromagnet after a selected delay time to cause attraction between the traveling reaction mass and the top block | 02-10-2011 |
20110058452 | Method of acquiring near offset and zero offset seismic data - A method for seismic data acquisition includes deploying a seismic energy source at a selected position above an area of the Earth's subsurface to be evaluated. A substantially zero offset sensor is disposed proximate the seismic energy source. A plurality of seismic sensors is deployed proximate the area. At selected times the seismic energy source is actuated. Signals detected by the seismic sensors and the substantially zero offset sensor are recorded. The substantially zero offset sensor signal recording is performed for a sufficient time to detect seismic energy reflected from the subsurface. | 03-10-2011 |
20110075513 | LOCATOR SYSTEM AND METHOD INCLUDING NODE AND TARGET ACQUISITION - The present disclosure relates to a method and system for finding and physically altering underground targets. Multiple nodes are dispersed into the ground and determine their spatial orientation using seismic waves, and then operate as an array to locate and properly time kinetic pulses to focus seismic waves on the target. | 03-31-2011 |
20110205842 | METHOD AND SYSTEM FOR PERFORMING SEISMIC SURVEYS WITH A LOW FREQUENCY SWEEP - A method and system are disclosed for performing seismic surveys using a seismic vibrator, which generates a sweep signal ( | 08-25-2011 |
20120008460 | DATA ACQUISITION SYSTEM WITH REMOVABLE - Data acquisition modules and systems including batteries with integrated data storage. The battery with integrated data storage can be selectively removed from the data acquisition module. This allows for reduced logistical effort associated with data retrieval and battery charging. For instance, the entire data acquisition module need not be transported to a central location for data recovery and charging, but rather the removable battery with integrated storage may be removed and transported. Also facilitated is extended surveys in that the battery or storage module may be replaced, such that survey design limitations such as storage capacity or battery life may be eliminated. | 01-12-2012 |
20120069706 | Land Seismic Cable and Method - A seismic cable for use in land applications is described. The cable includes seismic sensors for measuring seismic signals reflected from subterranean or subsea formations. The cable may be deployed in trenches dug in the survey region to provide adequate sensor coupling to ground. Sensor units may be inline with the cable and may further be disposed in slim casings, thus facilitating handling and deployment. | 03-22-2012 |
20120127828 | APPARATUS AND SYSTEM FOR ACQUIRING SEISMIC DATA OVER A LOOSE SURFACE - An apparatus and system for acquiring seismic data over a loose surface is disclosed. The apparatus includes a housing capable of moving on the loose surface with an opening configured at a bottom surface of the housing. The apparatus further includes a seismic sensing unit configured within the housing at an angle with respect to a horizontal plane. The horizontal plane may be the bottom surface of the housing. The seismic sensing unit is operable to retractably move within the housing towards and away from the opening. In response to the seismic sensing unit moving towards the opening, the seismic sensing unit establishes contact with the loose surface for acquiring the seismic data. | 05-24-2012 |
20120275266 | SIMULTANEOUS CONVENTIONAL AND PHASE-ENCODED SEISMIC ACQUISITION - The invention relates to a process for two separate seismic crews to work in proximity to one another that would otherwise require expensive time sharing where one crew is a conventional seismic acquisition system and the other is a phase encoded seismic acquisition system. Typically, each recording system would receive seismic energy from the other that neither data set would be very useful. The invention primarily envisions some collaboration between the crews where each adjusts its sweeps to comprise a different time duration so that the energy the other crew's sources are distinguishable in the data set and easily eliminated therefrom. Distinctions may be further enhanced when the two crews use construct their sweeps so that each crew has a distinctly different start frequency and a distinctly different end frequency. | 11-01-2012 |
20130100769 | Microseismic Data Acquisition Array and Corresponding Method - Disclosed are various embodiments of methods, devices and systems for performing a microseismic survey. According to some embodiments, microseismic signals are detected at seismic sensor stations deployed in two sets of seismic sensor lines, the seismic sensor lines within each set being substantially parallel to one another and the two sets of seismic sensor lines being mutually orthogonal. According to other embodiments, microseismic signals are detected at seismic sensor stations deployed in a hexagonal pattern. Such sensor geometries offer advantages over linear or radial arrays, including noise reduction, data acquisition flexibility as new wells are added to the survey area, and an improved distribution of data points above points in the subsurface. | 04-25-2013 |
20130242698 | Seismic Surveying Using Fiber Optic Technology - This application relates to methods and apparatus for seismic surveying using optical fibre distributed acoustic sensing (DAS). The method involves using a fibre optic distributed acoustic sensor to detect seismic signals. The fibre optic distributed acoustic sensor comprises an interrogator ( | 09-19-2013 |
20130286779 | QUASI-IMPULSIVE DISPLACEMENT SOURCE - The invention is an electric seismic vibrator source of the type used in seismic prospecting for hydrocarbons that creates a quasi-impulsive burst of seismic energy onto the ground and into the earth. The source uses an engine and generator combination to create electric power for all systems on the source such as driving a frame of linear electric motors that direct a rod or piston to contact the ground. All of the linear electric motors are driven against the ground in a high power pulse that delivers a band-limited spectrum of seismic energy over a very brief period of time that would like a “pop” and be measured in milliseconds. A quasi-impulsive seismic pulse would create a wave field that resembles the seismic data acquired using dynamite or other explosive seismic systems without the ultrahigh frequencies of a true explosive pulse. The quick burst or several quick bursts may further speed up the survey by minimizing the time that a vibe spends on a source point. | 10-31-2013 |
20130286780 | DISTINCTIVE LAND SEISMIC SWEEP - The invention is an electric sweep type seismic vibrator source of the type used in seismic prospecting for hydrocarbons. The source uses an engine and generator combination to create electric power for all systems on the source such as driving a frame of linear electric motors that direct a rod or piston to contact the ground in a recurring fashion along with driving the source from location to location through a survey area. Preferably a foot is arranged on the bottom end of the rod or piston for contact with the ground and by engaging the grid of motors to push down against the ground in a rapid progression, acoustic energy is created and delivered into the ground for geophones to sense and record. However, the rapid progression of pulses or sweep of seismic energy is delivered in a distinctive fashion as compared to a conventional upsweep or downsweep and the distinctiveness is also achieved by creating a designed cadence or timing such that each pulse in a series of pulses is not delivered in a regular timing. Several similar seismic sources may be employed where each is provided with its own distinctive series of pulses such that each may be identified within the data record and source separation from a number of seismic sources may be accomplished. | 10-31-2013 |
20130308422 | CONSTANT ENERGY DISPLACEMENTS - An electric sweep type seismic vibrator source of the type used in seismic prospecting for hydrocarbons is provided. In one example, the source uses an engine and generator combination to create electric power for all systems on the source such as driving a frame of linear electric motors that direct a rod or piston to contact the ground in a recurring fashion along with driving the source from location to location through a survey area. A foot is arranged on the bottom end of the rod or piston for contact with the ground and by engaging the grid of motors to push down against the ground in a rapid progression, acoustic energy is created and delivered into the ground for geophones to sense and record. | 11-21-2013 |
20130322211 | METHOD FOR ACQUIRING SEISMIC DATA - Receiver lines arranged in an area to be explored are provided with geophones in respective receiver positions for measuring seismic waves from the subsoil. The receiver lines include first parallel lines and second lines parallel to the first lines and located in intermediate positions between the first lines. Seismic waves are emitted from source positions located along the first receiver lines, and seismic data, representing waves measured by the various geophones in response to the emitted waves, are obtained. Said first seismic data are processed by seismic interferometry in order to estimate other seismic data representing responses, in at least some of the receiver positions, to waves emitted from a virtual source located in a receiver position along a second line. | 12-05-2013 |
20140104987 | LAND BASED UNIT FOR SEISMIC DATA ACQUISITION - A self-contained, wireless seismic data acquisition unit having a cylindrically shaped case with smooth side walls along the length of the case. A retaining ring around the circumference is used to secure the cylindrical upper portion of the case to the cylindrical lower portion of the case. Interleaved fingers on the upper portion of the case and the lower portion of the case prevent the upper portion and the lower portion from rotating relative to one another. Ruggedized external electrical contacts are physically decoupled from rigid attachment to the internal electrical components of the unit utilizing electrical pins that “float” relative to the external case and the internal circuit board on which the pins are carried. The seismic sensors in the unit, such as geophones, and the antennae for the unit are located along the major axis of the cylindrically shaped case to improve fidelity and timing functions. | 04-17-2014 |
20140126326 | METHOD AND SEISMIC VIBRATOR GUIDANCE SYSTEM BASED ON A FIELD ACQUIRED TRAJECTORY - A method for improving a 4-dimensional (4D) repeatability by modifying a given path to be followed by a source during a seismic survey. The method includes receiving the given path at a control device associated with a vehicle that caries the source; following the given path during a first seismic survey that is a baseline survey for the 4D seismic survey; deviating from the given path to follow a new path when encountering an obstacle on the given path; and updating the given path, based on the new path, to obtain an updated given path when a deviation condition is met. | 05-08-2014 |
20140126327 | SEISMIC SENSING DEVICE - In one example, a land based seismic sensing device includes: a seismic sensing unit having a seismic sensor in a housing configured to be buried in the ground; a control unit including a battery in a weather resistant housing configured to be exposed above ground; and a flexible cable mechanically and electrically connecting the seismic sensing unit and the control unit. The cable includes a weather resistant jacket and an electrically conductive element inside the jacket detachably connected between electronic circuitry in the sensing unit and electronic circuitry in the control unit. In one example, the control unit housing includes a first compartment configured to stow the seismic sensing unit and a second compartment configured to stow the cable. | 05-08-2014 |
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 |
20140169132 | METHOD AND DEVICE FOR DETERMINING FREQUENCY SWEEP FOR SEISMIC SOURCE - Controller and method for generating a frequency sweep for a seismic survey that uses a seismic source. The method includes receiving specification data about the seismic source; receiving environmental data about an infrastructure affected by the seismic survey; receiving guideline data about the infrastructure; setting a target energy spectrum density to be emitted by the seismic source during the seismic survey; and calculating, in a processor, the frequency sweep based on the specification data, environmental data, guideline data and the target energy spectrum density. | 06-19-2014 |
20140254318 | BURIED HYDROPHONE WITH SOLID OR SEMI-RIGID COUPLING - According to an embodiment, a seismic receiver device is described for use in a borehole surrounded by an ambient material, e.g., rock, mud, etc. The seismic receiver device includes a pressure wave measuring device which is configured to sense pressure changes associated with received seismic waves, a coating layer disposed on the pressure wave measuring device, and an outer layer disposed on the coating layer which is made of a material that is selected to have a bulk modulus number that is substantially similar to a bulk modulus number of the ambient medium. In this way, the acoustic impedance of the device is better matched to the ambient material so that more accurate seismic acquisition may be performed. | 09-11-2014 |
20140307524 | MULTIMODE SEISMIC UNIT AND ASSOCIATED METHODOLOGY - A multimode seismic unit can selectively operate in any one or more of multimode readout modes. In one embodiment, a multimode seismic unit ( | 10-16-2014 |
20140307525 | DRONE SEISMIC SENSING METHOD AND APPARATUS - An apparatus for automated seismic sensing includes a seismic sensing device for sensing seismic vibrations, a robotic transport unit for transporting the seismic sensing device to a targeted location, an engagement unit for placing the seismic sensing device in vibrational communication with the ground, and a recording module for recording the seismic data generated by the seismic sensing device. A corresponding method for automated seismic sensing includes transporting a seismic sensing device to a targeted location with a robotic transport device, determining a coupling metric for the seismic sensing device and the ground at a plurality of locations proximate to the targeted location, determining an acceptable location for seismic sensing, placing the seismic sensing device in vibrational communication with the ground at the acceptable location, and sensing seismic data with the seismic sensing device at the acceptable location. | 10-16-2014 |
20140362665 | LAND STREAMER SURVEYING USING MULTIPLE SOURCES - Various examples are provided for land streamer seismic surveying using multiple sources. In one example, among others, a method includes disposing a land streamer in-line with first and second shot sources. The first shot source is at a first source location adjacent to a proximal end of the land streamer and the second shot source is at a second source location separated by a fixed length corresponding to a length of the land streamer. Shot gathers can be obtained when the shot sources are fired. In another example, a system includes a land streamer including a plurality of receivers, a first shot source located adjacent to the proximal end of the land streamer, and a second shot source located in-line with the land streamer and the first shot source. The second shot source is separated from the first shot source by a fixed overall length corresponding to the land streamer. | 12-11-2014 |
20150043308 | INTEGRATED SEISMIC MONITORING SYSTEM AND METHOD - An integrated seismic system and method for monitoring seismic parameters of a subsurface structure is provided. The integrated seismic system includes a plurality of mobile satellite nodes, a seismic cable and a base station. Each of the mobile satellite nodes has sensor stations operatively connectable thereto for collecting seismic data from the subsurface structure. The seismic cable operatively links the plurality mobile satellite nodes and the sensor stations. The base station includes a seismic acquisition unit for receiving seismic signals from the mobile satellite nodes via the seismic cable and generating seismic parameters therefrom. | 02-12-2015 |
20150063065 | SEISMIC VIBRATOR DEVICE AND METHOD WITH ROTATION SENSOR - A seismic land vibrator, comprising a baseplate comprising a substantially flat, rigid member; at least one driven member that is connected with the baseplate and extends in a direction that is substantially perpendicular to baseplate; a rotation sensor that is coupled to the baseplate and adapted to provide a signal that is indicative of rotational movement of at least a portion of the baseplate. | 03-05-2015 |
20150117149 | METHODS AND SYSTEMS FOR LAND SEISMIC SURVEYING - Methods and apparatuses for land seismic survey are provided. The methods and apparatuses utilize spatial derivatives of a seismic wavefield to interpolate, regularize or extrapolate seismic data. The methods and apparatuses may considerably reduce land seismic field efforts and/or compensate data gaps. | 04-30-2015 |
20150117150 | IN-PHASE PRECURSOR SEISMIC SWEEP - Various implementations described herein are directed to a method of performing a seismic survey operation. The method may include deploying two seismic sources. The method may include using the two seismic sources to perform a simultaneous in-phase precursor sweep. The method may also include using the two seismic sources to perform a simultaneous out-of-phase cascaded sweep. | 04-30-2015 |
20160025873 | Method for Acquiring Passive Seismic Data Using a Backbone Array - Disclosed herein are various embodiments of a method for designing and using a sparse static receiver array within the boundary of a controlled-source 3D seismic survey for the purpose of acquiring a useful passive seismic dataset. Some receivers are allocated to the passive seismic survey and are positioned in an approximately uniform distribution over the entire survey area to form a “Backbone Array”. These receivers are positioned as required to obtain adequate coverage of the subsurface for various types of analysis that may be performed on passive seismic data. Backbone Arrays may be combined with Outlier Arrays for optimal coverage of the survey area. Other receivers are used to create an active receiver patch within the survey area for the controlled source seismic surveys. Data from the passive seismic receivers is recorded for the duration of the controlled source seismic survey. Combining passive seismic data acquisition with a controlled source seismic survey allows more information to be obtained about the subsurface of the earth | 01-28-2016 |
20160025874 | Method for Acquiring Passive Seismic Data Using an Outlier Array - Disclosed herein are various embodiments of a method for designing and using a sparse static receiver array outside of the boundary of a controlled-source 3D seismic survey for the purpose of acquiring a useful passive seismic dataset. Receivers in the passive seismic survey outside the boundary of the controlled source seismic survey are positioned so as to extend the coverage of the passive seismic survey to form an “Outlier Array”. These receivers are positioned as required to obtain adequate coverage of the subsurface for various types of analysis that may be performed on passive seismic data. Outlier Arrays may be combined with Backbone Arrays for optimal coverage of the survey area. Data from the passive seismic receivers is recorded for the duration of the controlled source seismic survey. Combining passive seismic data acquisition with a controlled source seismic survey allows more information to be obtained about the subsurface of the earth. | 01-28-2016 |