By Receiver Pattern Arrangement Patents (Class 367/58)
  • Patent number: 10451753
    Abstract: The present disclosure is directed to a MEMS-based rotation sensor for use in seismic data acquisition and sensor units having same. The MEMS-based rotation sensor includes a substrate, an anchor disposed on the substrate and a proof mass coupled to the anchor via a plurality of flexural springs. The proof mass has a first electrode coupled to and extending therefrom. A second electrode is fixed to the substrate, and one of the first and second electrodes is configured to receive an actuation signal, and another of the first and second electrodes is configured to generate an electrical signal having an amplitude corresponding with a degree of angular movement of the first electrode relative to the second electrode. The MEMS-based rotation sensor further includes closed loop circuitry configured to receive the electrical signal and provide the actuation signal. Related methods for using the MEMS-based rotation sensor in seismic data acquisition are also described.
    Type: Grant
    Filed: January 16, 2017
    Date of Patent: October 22, 2019
    Assignee: WESTERNGECO L.L.C.
    Inventors: Maxime Projetti, Olivier Vancauwenberghe, Nicolas Goujon, Hans Paulson
  • Patent number: 10422744
    Abstract: Provided is an interferometer for inspecting a test sample. The interferometer includes: a light source for providing a light beam; a beam splitting element, splitting the light beam into first and second incident light, wherein the first incident light is reflected by the test sample into first reflection light; a reflecting element, reflecting the second incident light into second reflection light; an optical detection element, receiving the first and the second reflection light into an interference signal; and a signal processing module, coupled to the optical detection element, for performing spatial differential calculation on the interference signal to generate a demodulation image of the test sample.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: September 24, 2019
    Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
    Inventors: Ting-Wei Chang, Yuan-Chin Lee, Chi-Shen Chang, Hung-Chih Chiang, Shuen-Chen Chen
  • Patent number: 9869613
    Abstract: An electrically passive device and method for in-situ acoustic emission, and/or releasing, sampling and/or measuring of a fluid or various material(s) is provided. The device may provide a robust timing mechanism to release, sample and/or perform measurements on a predefined schedule, and, in various embodiments, emits an acoustic signal sequence(s) that may be used for triangulation of the device position within, for example, a hydrocarbon reservoir or a living body.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: January 16, 2018
    Assignee: FLUIDION SAS
    Inventors: Andreas Hausot, Dan E. Angelescu
  • Patent number: 9835749
    Abstract: Apparatus and methods for acquiring seismic data using a seabed seismic data cable positioned on a seabed are described, including correcting for the effect of one or more sensor non-linear motions, which improves accuracy of seismic data. One or multiple non-linear movements of the sensor may be corrected for. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: January 8, 2013
    Date of Patent: December 5, 2017
    Assignee: WESTERNGECO L.L.C.
    Inventors: Robbert J. De Kok, Nicolas Goujon, Leendert Combee, Aslaug Stroemmen Melboe
  • Patent number: 9772261
    Abstract: An electrically passive device and method for in-situ acoustic emission, and/or releasing, sampling and/or measuring of a fluid or various material(s) is provided. The device may provide a robust timing mechanism to release, sample and/or perform measurements on a predefined schedule, and, in various embodiments, emits an acoustic signal sequence(s) that may be used for triangulation of the device position within, for example, a hydrocarbon reservoir or a living body.
    Type: Grant
    Filed: April 3, 2014
    Date of Patent: September 26, 2017
    Assignee: FLUIDION SAS
    Inventors: Dan E. Angelescu, Andreas Hausot
  • Patent number: 9753167
    Abstract: Rotation data and translational data are received. A calibration operator is determined based on the rotation data and translational data, where the calibration operator is useable to relatively calibrate the rotation data and the translation of data.
    Type: Grant
    Filed: July 23, 2012
    Date of Patent: September 5, 2017
    Assignee: WESTERNGECO L.L.C.
    Inventors: Pascal Edme, Everhard Johan Muyzert
  • Patent number: 9664806
    Abstract: A method for spatial sampling of a seismic wavefield at the bottom of a water layer at an effective spatial sampling denser than the physical layout of the sensors. The sensors comprise a sensing element for vertical particle motion and a sensing element for rotational motion around a horizontal axis. Stress and wavefield conditions allow the rotational sensing element to yield the transverse horizontal gradient of the vertical particle motion wavefield, used in ordinate and slope sampling to yield improved transverse spatial sampling of the vertical particle motion wavefield.
    Type: Grant
    Filed: October 24, 2011
    Date of Patent: May 30, 2017
    Assignee: Geokinetics Acquisition Company
    Inventor: Robert H. Brune
  • Patent number: 9575197
    Abstract: Method and system for improving azimuth distribution. The system includes plural streamers towed by a streamer vessel; a central source towed by the streamer vessel; first and second front sources located in front of the plural streamers along a traveling direction of the streamer vessel; and first and second tail sources located behind of the plural streamers along the traveling direction. The offset distance between the first and second tail sources, along a cross-line direction, is larger than an offset distance between the first and second front sources.
    Type: Grant
    Filed: January 20, 2012
    Date of Patent: February 21, 2017
    Assignee: CGGVERITAS SERVICES (U.S.) INC.
    Inventor: Damian A. Hite
  • Patent number: 9389158
    Abstract: An electrically passive device and method for in-situ acoustic emission, and/or releasing, sampling and/or measuring of a fluid or various material(s) is provided. The device may provide a robust timing mechanism to release, sample and/or perform measurements on a predefined schedule, and, in various embodiments, emits an acoustic signal sequence(s) that may be used for triangulation of the device position within, for example, a hydrocarbon reservoir or a living body.
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: July 12, 2016
    Inventor: Dan Angelescu
  • Patent number: 9354339
    Abstract: In one embodiment, a method of processing seismic data using a single triaxial geophone is disclosed, where the method comprises acts of calibrating the single triaxial geophone sensor to determine a position and an orientation relative to a surrounding environment, configuring the single triaxial geophone sensor to receive seismic data from the surrounding environment along three orthogonal axes, measuring, with the single triaxial geophone sensor, a plurality of time series of seismic data from the surrounding environment for the three orthogonal axes, storing, with a computer system coupled to the single triaxial geophone sensor, the time series of seismic data from the surrounding environment for the three orthogonal axes, and processing, with the computer system, the time series of seismic data to identify a plurality of seismic waves of different polarizations.
    Type: Grant
    Filed: December 11, 2013
    Date of Patent: May 31, 2016
    Assignee: Raytheon BBN Technologies Corp.
    Inventor: Kevin Bongiovanni
  • Patent number: 9304221
    Abstract: Translational data acquired by at least one translational survey sensor is received, and rotation data is received. A representation of wavefield velocity based on the translational data and the rotation data is determined.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: April 5, 2016
    Assignee: WesternGeco L.L.C.
    Inventors: Pascal Edme, Everhard Johan Muyzert
  • Patent number: 9103941
    Abstract: Computing device, computer instructions and method for deghosting seismic data related to a subsurface of a body of water. The method includes receiving seismic data recorded by seismic receivers that are towed by a vessel, wherein the seismic data is recorded in a time-space domain and the seismic receivers are located at different depths (zr) in the body of water; modeling the seismic data in a shot or common midpoint domain as a function of linear operators that re-ghost the receiver to derive a model; using the derived model to remove the receiver ghost from the seismic data to obtain deghosted seismic data; and generating a final image of the subsurface based on the deghosted seismic data.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: August 11, 2015
    Assignee: CGGVERITAS SERVICES SA
    Inventor: Gordon Poole
  • Patent number: 8982666
    Abstract: Methods for fracture characterization of unconventional formations are provided. Synthetic seismic fracture responses can be generated based on the derived fracture parameters. The synthetic seismic fracture responses may then be used to derive optimum seismic data acquisition geometry for fracture characterization. These methods of determining the seismic data acquisition geometry are advantageous over conventional methods in that these methods are more reliable and cheaper than existing empirical methods, particularly as applied to fractured unconventional formations. Moreover, these methods allow fracture parameters to be derived from limited but common well log data. Certain embodiments additionally contemplate determining the presence of gas filled fractures. These characterizations and evaluations of unconventional formations are useful for, among other things, determining optimal producing intervals and optimal drilling locations. These methods can eliminate the use of costly image logs and core data.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: March 17, 2015
    Assignee: ConocoPhillips Company
    Inventors: Samik Sil, Robert G. Keys, Baishali Roy, Douglas J. Foster
  • Patent number: 8902700
    Abstract: A borehole seismic acquisition system is described with a plurality of sensors arranged so as to identify within the data measured by the pressure sensors P- and S-wave related signals converted at the boundary of the borehole into pressure waves, the sensors being best arranged in groups or clusters sensitive to pressure gradients in one or more directions.
    Type: Grant
    Filed: June 26, 2006
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Everhard Johan Muyzert, James Edward Martin, Julian Edward Kragh, Gwénola Claire Marie Michaud
  • Patent number: 8867307
    Abstract: A method for seismic surveying includes disposing a plurality of seismic sensors in a selected pattern above an area of the Earth's subsurface to be evaluated. A seismic energy source is repeatedly actuated proximate the seismic sensors. Signals generated by the seismic sensors, indexed in time with respect to each actuation of the seismic energy source are recorded. The recorded signals are processed to generate an image corresponding to at least one point in the subsurface. The processing includes stacking recordings from each sensor for a plurality of actuations of the source and beam steering a response of the seismic sensors such that the at least one point is equivalent to a focal point of a response of the plurality of sensors.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: October 21, 2014
    Assignee: Acoustic Zoom, Inc.
    Inventors: Jacques Y. Guigné, Nicholas G. Pace
  • Patent number: 8654606
    Abstract: A sensor assembly has first sensors spaced apart along a first direction, and second sensors oriented in a second direction generally orthogonal to the first direction. Differencing of outputs of the first sensors is performed, and differencing of outputs of the second sensors is performed. A signal output is produced by combining the differenced outputs of the first sensors and the differenced outputs of the second sensors, where the signal output represents a seismic response of a subterranean structure.
    Type: Grant
    Filed: July 27, 2010
    Date of Patent: February 18, 2014
    Assignee: WesternGeco L.L.C.
    Inventors: Everhard Muyzert, Pascal Edme, Julian Edward Kragh
  • Patent number: 8611185
    Abstract: The present invention concerns a method and an antenna for active and/or passive seismic survey, such as a particular geometric layout of a plurality of vibration sensors, each one of adequate sensitivity, to be used with signal correlation in seismic surveys with or without an artificial wave source. In particular, the invention concerns a specific geometric layout of four vibration sensors, set along an alignment at positions, with one position chosen so that the antenna covers the desired wavelength interval. The sum of the signal correlations of all possible sensor couples allows a uniform sampling of all the spatial wavelengths that such an antenna defines, producing an accurate measure of the elastic and anelastic parameters of the subsoil and of the vibrational modes of a construction with the minimum possible number of sensors and minimum physical dimensions.
    Type: Grant
    Filed: February 22, 2011
    Date of Patent: December 17, 2013
    Inventor: Francesco Mulargia
  • Patent number: 8542556
    Abstract: A vibration sensor system for contacting the surface of a solid medium for detecting horizontally polarized shear waves and compressional waves. At least two contact points interface between a vibration sensor array and the solid medium to provide uninterrupted contact with the medium during detection of dynamic motions in the medium. A single vibration sensor is mounted on at least two adjacent contact points to convert detected dynamic motions to corresponding electrical signals. The single vibration sensor mounted on the two adjacent contact points forms a sub-array. The vibration sensor system has at least two sub-arrays. A conditioning and combining member treats sensor electrical signals from at least two sub-arrays to form a composite output signal for the system.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: September 24, 2013
    Inventor: Thomas E. Owen
  • Patent number: 8483010
    Abstract: A subterranean survey system includes a sensor string having a communications link and a plurality of survey sensors connected to the communications link. The sensor string has a loop connection to provide communications redundancy, and the survey sensors are used to detect signals affected by a subterranean structure. A first router is connected to the sensor string, and a transport network is connected to the first router. The first router communicates data from the survey sensors over the transport network.
    Type: Grant
    Filed: January 27, 2010
    Date of Patent: July 9, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: Brian Lee Virgin, Jostein Fonneland, Stuart Papworth
  • Patent number: 8462585
    Abstract: A method and apparatus for generating a seismic source signal are provided for generating energy in the form of a plurality of time sequence vibratory signals, the vibratory signals being partitioned as a function of time and/or frequency, wherein each of the plurality of signals comprises a distinguishing signature. The partitioned vibratory signals are emitted into a terrain of interest as seismic source signals for conducting a seismic survey.
    Type: Grant
    Filed: December 23, 2009
    Date of Patent: June 11, 2013
    Assignee: Inova Ltd.
    Inventors: Gary A. Sitton, Robert Bloor, J. MacDonald Smith
  • Patent number: 8441890
    Abstract: A method for processing geophysical data. The method includes applying a first interferometry on an estimate of a direct ground roll between a receiver location and one or more boundary source locations and an estimate of a direct ground roll between one or more boundary receiver locations and each boundary source location to generate an interferometric estimate of a direct ground roll between the receiver location and each boundary receiver location. The method then includes applying a second interferometry on geophysical data between the source location and each boundary receiver location and the interferometric estimate of the direct ground roll between the receiver location and each boundary receiver location to generate an interferometric estimate of a direct and scattered ground roll between the source location and the receiver location.
    Type: Grant
    Filed: August 2, 2010
    Date of Patent: May 14, 2013
    Assignee: WesternGeco L.L.C.
    Inventors: David Fraser Halliday, Andrew Curtis
  • Patent number: 8339899
    Abstract: Described herein is a land seismic data acquisition system comprising a central processing unit; a cabled network connected to the central processing unit comprising a plurality of acquisition lines each comprising: electronic units assembled in series along a telemetry cable and each associated with at least one seismic sensor, the units processing signals transmitted by the sensor(s); intermediate modules assembled in series along the telemetry cable and each associated with at least one of the electronic units, each intermediate module providing power supply and synchronization of the electronic unit(s) wherewith it is associated; wherein each electronic unit is associated with at least two intermediate modules including at least one upstream and at least one downstream from the electronic unit along the telemetry cable, and comprises synchronization means independent from the cabled network, bidirectional and autonomous power supply means, bidirectional storage means of the signals processed by the electr
    Type: Grant
    Filed: November 25, 2009
    Date of Patent: December 25, 2012
    Assignee: Sercel
    Inventor: Daniel Boucard
  • Patent number: 8164979
    Abstract: A system and method of acquiring and processing full elastic waveform data from a vertical-force source comprises providing seismic waves into the earth from the vertical-force source, sensing reflections of the seismic waves at multi-component geophones placed along the surface of the earth, and processing the reflections of the seismic waves to generate full elastic waveform data.
    Type: Grant
    Filed: August 24, 2011
    Date of Patent: April 24, 2012
    Assignee: Board of Regents of the University of Texas System
    Inventor: Bob A. Hardage
  • Publication number: 20120026834
    Abstract: A sensor assembly has first sensors spaced apart along a first direction, and second sensors oriented in a second direction generally orthogonal to the first direction. Differencing of outputs of the first sensors is performed, and differencing of outputs of the second sensors is performed. A signal output is produced by combining the differenced outputs of the first sensors and the differenced outputs of the second sensors, where the signal output represents a seismic response of a subterranean structure.
    Type: Application
    Filed: July 27, 2010
    Publication date: February 2, 2012
    Inventors: Everhard Muyzert, Pascal Edme, Julian Edward Kragh
  • Patent number: 8040754
    Abstract: A system and method of acquiring and processing full elastic waveform data from a vertical-force source comprises providing seismic waves into the earth from the vertical-force source, sensing reflections of the seismic waves at multi-component geophones placed along the surface of the earth, and processing the reflections of the seismic waves to generate full elastic waveform data.
    Type: Grant
    Filed: August 27, 2010
    Date of Patent: October 18, 2011
    Assignee: Board of Regents of the University of Texas System
    Inventor: Bob A. Hardage
  • Publication number: 20110249530
    Abstract: To perform seismic surveying, a plurality of sensor assemblies are provided, where each of multiple ones of the plurality of sensor assemblies has a seismic sensor and a divergence sensor, and where the divergence sensor is used to measure noise. In addition, the plurality of sensor assemblies are arranged in a layout designed to acquire seismic signals in a target sampling pattern, where the layout is independent of provision of sensor assemblies for noise acquisition.
    Type: Application
    Filed: April 9, 2010
    Publication date: October 13, 2011
    Inventors: Qinglin Liu, Daniel Ronnow, Jon Magnus Soerli, Julian Edward Kragh, Johan O.A. Robertsson
  • Patent number: 7974153
    Abstract: A receiver point arrangement is deployed having one or more receiver lines, each receiver line having receivers with substantially uniform inline spacing. A seismic source is triggered at each source point in an arrangement of source points along one or more source lines, each source line having source points with substantially uniform crossline spacing. Seismic data traces are collected, each trace having an associated midpoint. A perturbation pattern is applied to at least one of the receiver point arrangement and the source point arrangement to distribute the midpoints evenly within a bin having dimensions of half the receiver inline spacing and half the source crossline spacing across multiple locations within that bin.
    Type: Grant
    Filed: September 27, 2007
    Date of Patent: July 5, 2011
    Assignee: Geokinetics Acquisition Company Inc.
    Inventors: Gary J. Elkington, Roy Malcolm Lansley
  • Publication number: 20110085420
    Abstract: A passive method for exploring a region below the surface of the earth. The method comprises using a single sensor located in turn at a plurality of locations 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 data are processed so as to obtain a measure of the energy in a frequency band within the frequency range. For example, the seismic data may be filtered and may be subjected to amplitude normalization before being transformed into the frequency domain. The energy measure may then 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.
    Type: Application
    Filed: December 22, 2008
    Publication date: April 14, 2011
    Applicant: STATOIL ASA
    Inventors: Sascha Bussat, Peter Hanssen, Simone Patricia Kugler
  • Patent number: 7830748
    Abstract: A method for seismic surveying includes disposing a plurality of seismic sensors in a selected pattern above an area of the Earth's subsurface to be evaluated. A seismic energy source is repeatedly actuated proximate the seismic sensors. Signals generated by the seismic sensors, indexed in time with respect to each actuation of the seismic energy source are recorded. The recorded signals are processed to generate an image corresponding to at least one point in the subsurface. The processing includes stacking recordings from each sensor for a plurality of actuations of the source and beam steering a response of the seismic sensors such that the at least one point is equivalent to a focal point of a response of the plurality of sensors.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: November 9, 2010
    Assignee: PanGeo Subsea, Inc.
    Inventors: Jacques Y. Guigné, Nicholas G. Pace
  • Patent number: 7545704
    Abstract: A method for analyzing seismic data from a formation. The method may first receive two-dimensional (2-D) seismic data of a formation comprising a number of individual seismic lines acquired over an exploration area and having a large interline spacing. The 2-D seismic data may then be preprocessed to enhance diffracted energy. For each respective hypothetical diffractor location, the method may then search for coherent diffraction arrivals on nearby 2-D seismic lines consistent with the respective hypothetical diffractor location. The method may then store information regarding identified diffractor locations. The method may then create a map based on the identified diffractor locations, wherein the map illustrates areas of high diffraction. The map may then be displayed on a display, wherein the map is useable to assess the formation.
    Type: Grant
    Filed: February 13, 2007
    Date of Patent: June 9, 2009
    Assignee: Landmark Graphics Corporation
    Inventor: Stewart Arthur Levin
  • Patent number: 7499374
    Abstract: Method for determining acceptability of sensor locations used to perform a seismic survey. In one implementation, the method includes obtaining a first set of reference data, generating a first output trace from a second set of reference data estimated from the first set of reference data at a plurality of planned sensor locations, generating a second output trace from a third set of reference data estimated at a plurality of actual sensor locations and comparing the second output trace with the first output trace to determine whether the variation between the second output trace and the first output trace is less than a predetermined value.
    Type: Grant
    Filed: December 14, 2006
    Date of Patent: March 3, 2009
    Assignee: WesternGeco L.L.C.
    Inventor: Ralf Ferber
  • Patent number: 7391674
    Abstract: Methods and systems for estimating one or more orientation parameters of a seismic apparatus are described. One method comprises initiating an acoustic signal from an acoustic transmitter in a marine seismic spread comprising a streamer, the streamer having at least two nodes separated by a fixed distance; measuring a first and a second difference in acoustic arrival times at the nodes for the acoustic signal; and using change in the second difference from the first difference to estimate orientation of the streamer. 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. 37 CFR 1.72(b).
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: June 24, 2008
    Assignee: Western Geco L.L.C.
    Inventor: Kenneth E. Welker
  • Patent number: 7102961
    Abstract: The specification discloses a system and related method for installing seismic sensors in shallow, low-angle boreholes for obtaining conventional three-dimensional and four-dimensional seismic surveys. Installing seismic sensors in shallow, low-angle boreholes removes the sensing devices from surface anomalies that may affect seismic sensing performance. Moreover, installation of the seismic devices in this manner may be done in environmentally sensitive areas without undue environmental impact.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: September 5, 2006
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael P. Curtis, Tacio Jose de Oliveira DaSilva
  • Patent number: 6903999
    Abstract: A method for estimating near-surface material properties in the vicinity of a locally dense group of seismic receivers is disclosed. The method includes receiving seismic data that has been measured by a locally dense group of seismic receivers. Local derivatives of the wavefield are estimated such that the derivatives are centered at a single location preferably using the Lax-Wendroff correction. Physical relationships between the estimated derivatives including the free surface condition and wave equations are used to estimate near-surface material properties in the vicinity of the receiver group. Another embodiment of the invention is disclosed wherein the physical relationships used to estimate material properties are derived from the physics of plane waves arriving at the receiver group, and the group of receivers does not include any buried receivers.
    Type: Grant
    Filed: January 19, 2001
    Date of Patent: June 7, 2005
    Assignee: Schlumberger Technology Corporation
    Inventors: Andrew Curtis, Johan Olof Anders Robertsson, Remco Muijs
  • Patent number: 6836448
    Abstract: A system and method of creating a filter for use with locally dense seismic data is disclosed. The method includes obtaining survey geometry characteristics from a locally dense seismic survey. A filter is designed which uses spatial derivatives of the wavefield of order between (1) and the maximum order of spatial derivatives of the wavefield that can be estimated within a group. The filter can be designed so as to separate up/down going components, p/s components, or both up/down and p/s components. Partial derivatives in space and time of the wavefield can be calculated, using, for example, a taylor series expansion as an approximation. The seismic data is filtered by combining estimated near surface material properties, the seismic data, and the calculated partial derivatives.
    Type: Grant
    Filed: July 9, 2002
    Date of Patent: December 28, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Johan Olof Anders Robertsson, Andrew Curtis
  • Patent number: 6791901
    Abstract: Seismic detection apparatus comprising seismic detection means capable of detecting a plurality of seismic components over a defined tetrahedral volume is provided. The seismic detection means comprises four three-component geophones. Seismic data acquired by the geophones is processed to separate P-wave components from S-wave components. The geophones are spaced apart by distances smaller than the wavelength of the detected seismic components. The apparatus may be used on surface or in a marine environment or transition zone. A method of processing seismic data is also provided comprising acquiring seismic data relating to a wavefield over a selected volume of acquisition, and measuring the curl and divergence of the wavefield from the seismic data, to thereby identify seismic components within the seismic data. Additionally, an apparatus and method for hydrocarbon exploration is disclosed for using three or more seismic receivers placed in a plane and spaced closely to each other.
    Type: Grant
    Filed: September 15, 1999
    Date of Patent: September 14, 2004
    Assignee: Schlumberger Technology Corporation
    Inventors: Johan Olof Anders Robertsson, Andrew Curtis
  • Publication number: 20040052159
    Abstract: The invention is a method for determining the orientation of a multi-component receiver where the preferred embodiment of the method makes use of an approximation of the relative bearing angle provided by a relative bearing sensor. The method comprises the steps of scanning various angles around the approximated relative bearing angle provided by the relative bearing sensor and for each scanned angle rotating the data into the true earth frame using a given scanned angle and measuring the polarization angle of the rotated data in the horizontal plane and calculating a weighted sum of the differences between the source azimuth and the estimated azimuth from the polarization.
    Type: Application
    Filed: September 14, 2002
    Publication date: March 18, 2004
    Inventor: Philip Neville Armstrong
  • Publication number: 20030202425
    Abstract: The specification discloses a system and related method for installing seismic sensors in shallow, low-angle boreholes for obtaining conventional three-dimensional and four-dimensional seismic surveys. Installing seismic sensors in shallow, low-angle boreholes removes the sensing devices from surface anomalies that may affect seismic sensing performance. Moreover, installation of the seismic devices in this manner may be done in environmentally sensitive areas without undue environmental impact.
    Type: Application
    Filed: April 24, 2002
    Publication date: October 30, 2003
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Michael P. Curtis, Tacio Jose de Oliveira DaSilva
  • Publication number: 20030117894
    Abstract: A method for estimating near-surface material properties in the vicinity of a locally dense group of seismic receivers is disclosed. The method includes receiving seismic data that has been measured by a locally dense group of seismic receivers. Local derivatives of the wavefield are estimated such that the derivatives are centered at a single location preferably using the Lax-Wendroff correction. Physical relationships between the estimated derivatives including the free surface condition and wave equations are used to estimate near-surface material properties in the vicinity of the receiver group.
    Type: Application
    Filed: October 16, 2002
    Publication date: June 26, 2003
    Inventors: Andrew Curtis, Johan Olof Anders Robertsson, Remco Muijs
  • Patent number: 6564150
    Abstract: A system for, and method of, orienting seismic energy sources and seismic energy receivers to substantially separate a compressional wave from a vertical shear wave. The method includes reflecting a seismic energy from a subsurface interface to produce a reflected seismic energy wave that has a compressional energy and vertical shear energy associated therewith. A first seismic energy receiver is oriented such that it is aligned with an angle of emergence of the reflected seismic energy wave to thereby maximize the vertical shear energy received by a second seismic energy receiver.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: May 13, 2003
    Assignees: Board of Regents for the University of Texas, Vecta Technologies, LP
    Inventors: Allen L. Gilmer, Bob A. Hardage, James L. Simmons, Jr.
  • Publication number: 20030086335
    Abstract: Method intended for absolute preserved amplitude processing of data obtained by seismic prospecting known as VSP.
    Type: Application
    Filed: November 1, 2002
    Publication date: May 8, 2003
    Inventors: Charles Naville, Sylvain Serbutoviez
  • Publication number: 20030076741
    Abstract: A system and method of creating a filter for use with locally dense seismic data is disclosed. The method includes obtaining survey geometry characteristics from a locally dense seismic survey. A filter is designed which uses spatial derivatives of the wavefield of order between (1) and the maximum order of spatial derivatives of the wavefield that can be estimated within a group. The filter can be designed so as to separate up/down going components, p/s components, or both up/down and p/s components. Partial derivatives in space and time of the wavefield can be calculated, using, for example, a taylor series expansion as an approximation. The seismic data is filtered by combining estimated near surface material properties, the seismic data, and the calculated partial derivatives.
    Type: Application
    Filed: July 9, 2002
    Publication date: April 24, 2003
    Inventors: Johan Olof Anders Robertsson, Andrew Curtis
  • Patent number: 6091668
    Abstract: A system and method for periodically providing information about subsurface formations in a marine environment using a non-towed seismic signal source (3) and a static array of seismic signal receivers (4) is disclosed. The seismic signal source (3) comprises a support frame (10) and a line (7) attaching the support frame to a stationary platform (2), wherein the line (7) restrains the support frame (10) in a position that is static in relation to the formation (8). The seismic signal source (3) includes eight air guns (12) attached to the support frame (10) such that the air guns (12) are discharged to provide a tapered, heavy centered, point source seismic signal at a specific location relative to the formation (8) that is reflected to the static array of seismic signal receivers (4) such that changes in the formation characteristics may be observed over time.
    Type: Grant
    Filed: May 6, 1998
    Date of Patent: July 18, 2000
    Assignee: SeaScan, Inc.
    Inventor: Harold Pauley Barber, Sr.
  • Patent number: 6075752
    Abstract: The method consists in building a common midpoint gather of seismic traces of which the CMP point is said given point, subjecting the traces of this gather to dynamic and/or static corrections, and characterized in that the gather associated with the given point (A) is built by recording four CMP sub-gathers associated with said given point along four angular directions (1 to 4) passing through said given point, and dynamic and/or static corrections are applied to each of the four CMP sub-gathers in order to determine, for each sub-gather, a value of the curvature and/or the velocity optimizing the energy of the trace stack of the corrected sub-gather concerned, the four values thus obtained representing the components of the stacking velocity field desired for each of the reflector elements corresponding to the given point, and characterized by a vertical propagation time t0 with reflection for zero offset.Application in particular to the exploration of a medium with a complex tectonics.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: June 13, 2000
    Assignee: Elf Aquitaine Production
    Inventor: Eric de Bazelaire
  • Patent number: 6028822
    Abstract: A method for performing a seismic survey with even fold. An inline direction and a crossline direction are selected. Seismic signals are generated at a plurality of source locations positioned along one or more source lines. The source locations are substantially equally spaced, and the source lines are substantially parallel to each other. Seismic signals are detected at a plurality of receiver locations positioned along a plurality of receiver paths having longitudinal axes parallel to the inline direction, and substantially equally spaced in each receiver path. Each receiver path is positioned along its axis, and extends in a regular pattern on both sides of the axis. The axes are substantially parallel to each other. A desired fold, F.sub.i, is determined in the inline direction, and a desired fold, F.sub.x, is determined in the crossline direction. A number of receiver channels, NC.sub.i, per receiver path in the inline direction, a spacing, RI.sub.
    Type: Grant
    Filed: October 19, 1998
    Date of Patent: February 22, 2000
    Assignee: Western Atlas International, Inc.
    Inventors: Roy Malcolm Lansley, Gary Joseph Elkington, Nicholas John Battaglino, III
  • Patent number: 6026059
    Abstract: Processes are described for providing a data set useful for performing analysis of reflection attribute variation among traces in a window of three-dimensional seismic data, wherein the traces have a reflection point assigned thereto and wherein the traces represent recordings from shot-receiver pairs having various azimuth angles. According to one embodiment, the process comprises: assigning an offset value to a plurality of traces; fitting a substantially conical surface having a major and a minor axis to the data of the traces within the window, wherein: the major axis of the cone represents the azimuth direction having the lowest variation in the reflection attribute, and the minor axis of the cone represents the azimuth direction having the highest variation in the reflection attribute; assigning a coordinate set to the surface, wherein the coordinate set is related to a survey geometry of the data; and comparing the reflection attribute variation as a function of offset and azimuth.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: February 15, 2000
    Assignee: Petroleum Geo-Services (US), Inc.
    Inventor: Joel Starr
  • Patent number: 6002641
    Abstract: An apparatus and method are provided for ensuring good coupling and vertically planting of seismic receivers while substantially reducing the need for interconnecting wires and costly surveys. The apparatus includes an acquisition unit (AU) 20 for measuring seismic energy and a planting member 12 for engaging and planting the AU 20. An electronic surveying instrument 14 is coupled to the planting member 12 for determining the location of the AU 20. An installer 16 plants the AU 20 in the terrain 22 in near vertical alignment using the planting member 12. Once the AU 20 is planted in near vertical alignment, coordinates are downloaded from the electronic survey unit to locate the planted AU 20.
    Type: Grant
    Filed: April 28, 1998
    Date of Patent: December 14, 1999
    Assignee: Input/Output, Inc.
    Inventor: Loring Chien
  • Patent number: 5999489
    Abstract: A method for producing high vertical resolution seismic images from crosswell data is disclosed. In accordance with one aspect of the disclosure, a set of vertically spaced, generally horizontally extending continuous layers and associated nodes are defined within a region between two boreholes. The specific number of nodes is selected such that the value of a particular characteristic of the subterranean region at each of the nodes is one which can be determined from the seismic data. Once values are established at the nodes, values of the particular characteristic are assigned to positions between the node points of each layer based on the values at node within that layer and without regard to the values at node points within any other layer. A seismic map is produced using the node values and the assigned values therebetween. In accordance with another aspect of the disclosure, an approximate model of the region is established using direct arrival traveltime data.
    Type: Grant
    Filed: March 21, 1997
    Date of Patent: December 7, 1999
    Assignee: TomoSeis Inc.
    Inventor: Spyridon K. Lazaratos
  • Patent number: 5973995
    Abstract: The present invention enables both deep marine seismic surveys and site seismic surveys to be performed simultaneously. A survey vessel tows a first seismic array (6, 16, 20) for a deep survey and a second seismic array (6, 16, 20) for the site survey. The arrays are operationally distinct but may share common physical components.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: October 26, 1999
    Assignee: Geco A.S.
    Inventors: Robin Charles Walker, Olav Lindtjoern
  • Patent number: 5771202
    Abstract: A method for acquisition of seismic data from an area surveyed using a group of seismic energy sources and a group of seismic streamer cables, particularly a marine area, includes forming a first group A from at least two elements of either seismic energy sources S or seismic streamer cables C having a spacing X between said elements, forming a second group B from at least two of the other elements of sources S or cables C than that forming group (A), spacing the elements in group B a distance equal to X multiplied by the number of elements in group A, forming a group C from at least two subgroups each consisting of a group A, spacing said subgroups in group C in distance equal to the distance between two elements in group B multiplied by the number of elements in group B, the spacing between two adjacent subgroups being equal to the lateral distance between midpoints between the subgroups, and forming further groups as desired D, E, F etc.
    Type: Grant
    Filed: June 30, 1993
    Date of Patent: June 23, 1998
    Assignee: Geco A.S.
    Inventors: Richard Bale, Ian McMillan