Seismic Prospecting Patents (Class 367/14)
  • Patent number: 8072841
    Abstract: A method for generating a synthetic seismogram. In one implementation, a ray tracing may be performed on a subsurface. The ray tracing may generate a plurality of rays. A first seismic wavefront may be reconstructed by triangulating a first plurality of control points that correspond to the plurality of rays. Each control point may represent an end point of a ray at the first seismic wavefront. The plurality of rays may be propagated to a second seismic wavefront. The second seismic wavefront may have a hole associated with at least one missing ray at the second seismic wavefront. A plurality of points on a circle may be defined that correspond to a second plurality of control points defining the hole. The second seismic wavefront may be reconstructed based on the plurality of points on the circle.
    Type: Grant
    Filed: December 10, 2008
    Date of Patent: December 6, 2011
    Assignee: WesternGeco L.L.C.
    Inventors: Toshi Thomas Chang, Luis Canales, Alfonso Gonzalez
  • Patent number: 8059018
    Abstract: Methods and systems for digital control utilizing oversampling.
    Type: Grant
    Filed: September 8, 2008
    Date of Patent: November 15, 2011
    Assignee: L&L Engineering, LLC
    Inventors: Paul Latham, Stewart Kenly
  • Publication number: 20110261645
    Abstract: The invention comprises a synergy of technology integrations including an acoustic device and method of using said device(s)—to initiate avalanche release as a non-explosive control alternative. The invention is an integration of technologies incorporating an acoustic device, power supply and amplification, inverter, digital signal processor, GPS, and RF receiver all housed in a rugged weather resistant enclosure with necessary gantry and rigging. The combination of these technologies allows control personnel to safely operate the equipment from a remote location. The invention is deployed remotely via a cable or network of cables to predetermined avalanche starting zone(s). The device can be rotated, panned the full length or range of the cable(s), and tilted offering the user comprehensive coverage of any topography.
    Type: Application
    Filed: April 26, 2010
    Publication date: October 27, 2011
    Inventors: David Allen Sager, Gavin Wade Washburn
  • Publication number: 20110242934
    Abstract: A method for passive seismic surveying includes deploying seismic sensors in a plurality of spatially distributed wellbores disposed above a volume of subsurface formations to be evaluated. The sensors in each wellbore form a line of sensors. Each sensor generate optical or electrical signals in response to seismic amplitude. The seismic signals from each sensor are recorded for a selected period of time. The response of the seismic sensor recordings is beam steered to at least one of a selected point and a selected volume in the subsurface. At least one microseismic event is identified in the beam steered response.
    Type: Application
    Filed: April 5, 2010
    Publication date: October 6, 2011
    Inventors: Michael P. Thornton, Leo Eisner, Peter M. Duncan
  • Publication number: 20110213234
    Abstract: A system and method for using orthogonally-coded active source signals for reflected signal analysis, such as in seismic exploration, sonar, and/or ultrasound applications. One method comprises inputting an orthogonally-coded active source signal to a target site, where the orthogonally-coded active source signal is sufficiently random to not interfere with a delayed version of itself. A reflected signal is received from the target site, and based at least in part on the sufficiently random orthogonal coding of the active source signal, a determination is made whether the received signal is a reflection of the input active source signal.
    Type: Application
    Filed: March 1, 2011
    Publication date: September 1, 2011
    Inventors: Chris Leskiw, Ian Gates
  • Publication number: 20110158041
    Abstract: The presently disclosed technique includes a method for geophysical survey having at least one source and one receiver, wherein the survey has two sets of survey locations within the survey area, one set of survey locations for the source(s) and the other set of survey locations for the receiver(s), wherein the survey locations in one set are randomized.
    Type: Application
    Filed: December 28, 2010
    Publication date: June 30, 2011
    Applicant: WesternGeco L. L. C.
    Inventors: Nicolae Moldoveanu, Einar Otnes, John Quigley
  • Patent number: 7970544
    Abstract: Stoneley-wave data acquired in the LWD environment are used to characterize/estimate formation permeability. Real-time Stoneley-wave time-delay/slowness and center-frequency/attenuation data are used to indicate/characterize formation permeability even during drilling. The use of stabilizers mounted at the tool ends helps maintain the tool position from severe decentralization, reducing ambiguities in the permeability characterization/estimation.
    Type: Grant
    Filed: June 26, 2007
    Date of Patent: June 28, 2011
    Assignee: Baker Hughes Incorporated
    Inventors: Xiao Ming Tang, Douglas J. Patterson
  • Patent number: 7912649
    Abstract: Joint processing of seismic and controlled source electromagnetic (CSEM) surface data is performed by using a common rock physics model which relates reservoir properties (such as porosity, lithology, saturation, and shaliness) to surface seismic AVO (or AVA) data. This allows one to determine how perturbations in the reservoir properties affect surface data. This can be carried out by systematically changing the reservoir properties and examining the effect on the synthetic data. This allows the hydrocarbon type of a reservoir to be established, e.g. oil or gas, as well as the saturation level of the hydrocarbon in the reservoir, which is useful for determining whether the reservoir has a non-commercial, low hydrocarbon saturation or a commercial, high hydrocarbon saturation.
    Type: Grant
    Filed: June 6, 2008
    Date of Patent: March 22, 2011
    Assignee: OHM Limited
    Inventors: Peter Harris, Joel Walls
  • Patent number: 7900700
    Abstract: The invention generally relates a method of determining completion criteria for a coal bed methane reservoir having a plurality of coal seams.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: March 8, 2011
    Assignee: Schlumberger Technology Corporation
    Inventors: Arpana Sarkar, Rajiv Sagar, Theodore Klimentos, Indrajit Basu
  • Patent number: 7898903
    Abstract: A combined probe includes a dilatometer probe, a gas conduit coupled to the dilatometer probe for providing a gas connection between the dilatometer probe and an external gas source, a wire located in the gas conduit for providing an electrical connection between the dilatometer probe and an external circuit, and a seismic module coupled to the wire located in the gas conduit to provide an electrical connection between the seismic module and the external circuit.
    Type: Grant
    Filed: March 28, 2008
    Date of Patent: March 1, 2011
    Inventors: Silvano Marchetti, Diego Marchetti
  • Patent number: 7881501
    Abstract: The present invention relates to a method and system for processing multi-dimensional signal data to determine frequency dependent features therefrom. The multi-dimensional signal data are transformed into space-frequency or time-space-frequency domain, providing second signal data. At predetermined locations of at least a portion of the one of space and time-space of the second signal data a dominant feature corresponding to a largest value of the second signal data is determined. This is followed by the determination of a wave-vector corresponding to the dominant feature at each of the predetermined locations. Finally, a dip map, a frequency map, and an amplitude map are generated using the wave-vectors.
    Type: Grant
    Filed: December 13, 2006
    Date of Patent: February 1, 2011
    Assignee: Calgary Scientific Inc.
    Inventors: Charles Robert Pinnegar, Pierre Lemire, Ryan Kong, Doug Bird
  • Publication number: 20110007602
    Abstract: Techniques or mechanisms are provided to improve accuracy in determining headings and/or shapes of carrier structures based on measurements made by one or more compasses that are attached to or provided with the carrier structures. The carrier structures are used to carry survey receivers that detect survey signals affected by a subterranean structure.
    Type: Application
    Filed: July 9, 2009
    Publication date: January 13, 2011
    Inventors: Kenneth E. Welker, Roger Ellingsen, Rune Toennessen
  • Patent number: 7869955
    Abstract: 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.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: January 11, 2011
    Assignee: Chevron U.S.A. Inc.
    Inventors: Libo Zhang, Eike F. Rietsch
  • Publication number: 20100309747
    Abstract: A synchronous recording system is configured with a first seismograph and a second seismograph. The first seismograph includes a sensor, a GPS receiver, a data buffer, and a synchronous information transmission program that transmits synchronous information to the second seismograph, the information designating recording start time. The second seismograph includes a sensor, a GPS receiver, a data buffer, a recorder, a synchronous information reception program that receives the synchronous information, and a recording control program that starts, based on the synchronous information, recording in the recorder of oscillation data, which is recorded in the data buffer, from the designated recording start time.
    Type: Application
    Filed: June 7, 2010
    Publication date: December 9, 2010
    Inventors: Koji MIZUTANI, Yuto KONNO
  • Publication number: 20100284246
    Abstract: The present invention provides a method and apparatus for providing simplified seismological surveys with increased accuracy and ease of use. The present invention uses data received from satellite positioning systems to obtain time and position information. The information is used to determine transmission times of pressure waves between a seismic source and a seismic sensor.
    Type: Application
    Filed: October 23, 2007
    Publication date: November 11, 2010
    Inventors: Conor Keegan, Elio Vecchione
  • Patent number: 7797110
    Abstract: A Laplace transform system comprising a processor, a measured time domain wavefield, a velocity model, and Laplace damping constants, wherein the processor is programmed to calculate a substantially about zero frequency component of a Fourier transform of a time domain damped wavefield, wherein the time domain damped wavefield is damped by the Laplace damping constants to obtain long wavelength velocity information for deeper subsurface regions.
    Type: Grant
    Filed: November 19, 2007
    Date of Patent: September 14, 2010
    Assignee: Shin's Geophysics
    Inventor: Changsoo Shin
  • Publication number: 20100102985
    Abstract: A system for determining the position and/or orientation of electromagnetic receivers in a network of receiver instruments at a remote location, a first receiver instrument including one or more electromagnetic sensors, the system comprising transmitting means to send a characteristic signal, detecting means to detect transmitted signals from a plurality of receiver instruments, depth measurement means to measure the depth of the first instrument, recording means to store data from the transmitting means, the detecting means and the depth measurement means, and processing means for processing data from the receiver instruments.
    Type: Application
    Filed: September 24, 2007
    Publication date: April 29, 2010
    Inventors: David Ridyard, Mark J. Wilkinson
  • Publication number: 20100097885
    Abstract: A technique includes providing seismic data that is indicative of energy that is sensed in response to a first operation of at least one seismic source in a first seismic survey and a second operation of at least one seismic source in a second seismic survey. The technique includes processing the seismic data to determine a timing of the second operation relative to the first operation, and the technique includes based at least in part of the determined timing, processing the seismic data to generate a dataset, which is indicative of the sensed energy that is attributable to the first operation and is not attributable to the second operation.
    Type: Application
    Filed: October 22, 2008
    Publication date: April 22, 2010
    Inventor: Ian Moore
  • Patent number: 7688673
    Abstract: Seismic sensor systems and sensor station topologies, as well as corresponding cable and sensor station components, manufacturing and deployment techniques are provided. For some embodiments, networks of optical ocean bottom seismic (OBS) stations are provided, in which sensor stations are efficiently deployed in a modular fashion as series of array cable modules deployed along a multi-fiber cable.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: March 30, 2010
    Assignee: Optoplan AS
    Inventors: Erlend Rønnekleiv, Ole Henrik Waagaard, Hilde Nakstad, Arne Berg
  • Patent number: 7684952
    Abstract: Method for subsurface exploration. In one implementation, the method may include receiving a gamma value at a subsurface interface, wherein the gamma value is a ratio of Vp/Vs at the subsurface interface. Vp is the average P wave velocity and Vs is the average S wave velocity. The method may further include receiving a converted wave reflection coefficient at the subsurface interface. The converted wave reflection coefficient is a function of a density contrast at the subsurface interface and a shear velocity contrast at the subsurface interface. The method may further include determining a P wave incident angle such that the converted wave reflection coefficient is a function of substantially only the density contrast at the P wave incident angle. The P wave incident angle is referred to herein as ?. The method may further include calculating the density contrast based on the converted wave reflection coefficient at ?.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: March 23, 2010
    Assignee: WesternGeco L.L.C.
    Inventor: Keshan Zou
  • Patent number: 7680600
    Abstract: A method for data processing includes transforming measurement data acquired in the time domain during an oilfield operation into a second domain to produce transformed data; identifying distortions in the transformed data; removing the distortions from the transformed data; and transforming back from the second domain to the time domain to produce cleaned-up data. The transforming measurement data may use a Fourier transform or a wavelet transform. The method may further include compressing the cleaned-up data or reconstructing signals from the cleaned-up data. A method for data processing includes decomposing measurement data, which are acquired in an oilfield operation, using a low pass filter to produce a first dataset; decomposing the measurement data using a high pass filter to produce a second dataset; removing distortions from the second dataset to yield a corrected second dataset; and reconstructing a corrected dataset from the first dataset and the corrected second dataset.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: March 16, 2010
    Assignee: Schlumberger Technology Corporation
    Inventors: Andrew Carnegie, Kai Hsu, Julian Pop
  • Patent number: 7679993
    Abstract: A method of characterizing a fractured reservoir in a field includes measuring seismic reflection coefficient of the fractured reservoir as a function of angle of incidence and azimuth, predicting seismic reflection coefficient of the fractured reservoir as a function of angle of incidence and azimuth using an elastic stiffness tensor and an elastic compliance tensor of the fractured reservoir, determining components of an excess compliance tensor due to the presence of fractures in the fractured reservoir by matching the predicted seismic reflection coefficient to the measured seismic reflection coefficient, and characterizing one or more properties of the fractured reservoir using the excess compliance tensor.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: March 16, 2010
    Assignee: Schlumberger Technology Corporation
    Inventor: Colin M. Sayers
  • Patent number: 7676326
    Abstract: A method and system of detecting and mapping a subsurface hydrocarbon reservoir includes determining ratio data for a plurality of orthogonal spectral components of naturally occurring low frequency background seismic data. The ratio data may be compared, plotted, contoured and displayed as a subsurface hydrocarbon reservoir map or a hydrocarbon potential map. The ratio data may represent a vertical spectral component of the seismic data over a horizontal spectral component of the seismic data. The subsurface hydrocarbon reservoir map may include contouring the ratio data over a geographical area associated with the seismic data.
    Type: Grant
    Filed: June 2, 2007
    Date of Patent: March 9, 2010
    Assignee: Spectraseis AG
    Inventors: Yuri Podladchikov, Marc-André Lambert, Rodolphe Dewarrat, Stefan Schmalholz
  • Patent number: 7660188
    Abstract: The present invention provides a seismic exploration and imaging system for producing seismic survey reports of subsea geological structures. The exploration system provides a method in which both P-waves and S-waves are detected without the need for placing detection apparatus in contact the seabed. A seismic event is applied (12) to the earth's surface (13), and the detected response including P-waves and S-waves in the earth's. The detecting apparatus comprises a means for monitoring and recording the response to the seismic event in the form of movements of particles at the earth's surface, from a position spaced from the earth's surface. Particles at the surface will respond both to P-wave and S-wave stimulation and so their movements will be representative of the two waves. These movements are detected from a distance.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: February 9, 2010
    Assignee: Statoil ASA
    Inventor: Paul Meldahl
  • Publication number: 20100020636
    Abstract: Methods and systems for determining coil eccentricity of seismic sensors configured or designed for use in seismic signal detection. A direct electrical current is applied to a moving coil of a seismic sensor such that the moving coil is dislocated from a neutral position relative to the magnetic field in the seismic sensor. A predetermined indicator is measured and eccentricity of the coil (?) relative to the center of the magnetic filed is determined using the predetermined indicator.
    Type: Application
    Filed: July 27, 2008
    Publication date: January 28, 2010
    Inventors: Masahiro Kamata, Francis Maissant
  • Publication number: 20100014381
    Abstract: A technique includes determining at least one parameter that characterizes a seismic survey in which multiple interfering seismic sources are fired and seismic sensors sense energy that is produced by the seismic sources. The determination of the parameter(s) includes optimizing the seismic survey for separation of the sensed energy according to the seismic sources.
    Type: Application
    Filed: July 16, 2008
    Publication date: January 21, 2010
    Inventors: Craig J. Beasley, William Henry Dragoset, JR., Ian Moore
  • Publication number: 20090279384
    Abstract: A method of controlling distributed devices includes configuring the devices to respond to a controlled signal; positioning the devices in an area of interest; and transmitting the controlled signal into the earth. The earth acts as the signal transmission medium. The method may include controlling a signal generator with a controller to transmit the controlled signal. An illustrative controlled signal may have a fixed frequency, a fixed amplitude, a fixed wave form, a modulated frequency, a modulated amplitude, a modulated wave form, and/or a predetermined duration. In aspects, the method may include connecting the signal generator to the earth and transmitting the controlled signal into the earth using the signal generator. Afterwards, the signal generator may be operated to impart seismic energy into the earth. The devices may be used to detect and record seismic energy that has reflected from underground formations.
    Type: Application
    Filed: May 7, 2008
    Publication date: November 12, 2009
    Inventor: Dennis R. Pavel
  • Patent number: 7617053
    Abstract: The present invention relates to a method and system for processing seismic data. Seismic data indicative of at least a time-dependent seismic trace are transformed into time-frequency domain using the S-transform. The transformed seismic data are processed for determining at predetermined time instances an instantaneous amplitude and a dominant instantaneous frequency. Based on a quotient of the instantaneous amplitude to the dominant instantaneous frequency seismic data indicative of a likelihood of a presence of hydrocarbons are then determined which are then graphically displayed. The method and system for processing seismic data provides a powerful tool for determining the likelihood of a presence of hydrocarbons based on a double peak hydrocarbon signature in the quotient of the instantaneous amplitude to the dominant instantaneous frequency.
    Type: Grant
    Filed: May 14, 2007
    Date of Patent: November 10, 2009
    Assignee: Calgary Scientific Inc.
    Inventors: C. Robert Pinnegar, Robert J. McGrory, Robert R. Stewart
  • Patent number: 7598884
    Abstract: The invention relates to a seismic warning system comprising of two or more sensors for detecting shock signals and electronic signal processing elements for processing and analyzing said signals. According to the invention, the system has at least two detection units, each comprising a shock sensor and electronic signal processing elements. The signal processing elements of each detection unit are configured in such a way that they detect the primary waves of earthquakes using the signals of the shock sensors. The detection units are interconnected via an electronic data bus.
    Type: Grant
    Filed: May 24, 2007
    Date of Patent: October 6, 2009
    Inventors: Heinz Lachenit, Jurgen Przybylak, Ralf-Dieter Schultz
  • Publication number: 20090245018
    Abstract: A combined probe includes a dilatometer probe, a gas conduit coupled to the dilatometer probe for providing a gas connection between the dilatometer probe and an external gas source, a wire located in the gas conduit for providing an electrical connection between the dilatometer probe and an external circuit, and a seismic module coupled to the wire located in the gas conduit to provide an electrical connection between the seismic module and the external circuit.
    Type: Application
    Filed: March 28, 2008
    Publication date: October 1, 2009
    Inventors: Silvano Marchetti, Diego Marchetti
  • Patent number: 7584056
    Abstract: Seismic data may be imaged using or recognizing substantially only primary reflections. Imaging seismic data may include for example integrating a plurality of seismic data points that have substantially similar arrival directions, for example, to a modeled primary ray. Seismic data points may be imaged that for example substantially meet a set of predetermined conditions, for example, conditions substantially unique to primaries, which may include for example arrival direction and angle of reflection.
    Type: Grant
    Filed: February 22, 2006
    Date of Patent: September 1, 2009
    Assignee: Paradigm Geophysical Ltd.
    Inventor: Zvi Koren
  • Patent number: 7581446
    Abstract: Methods, systems, and computer program products for determining a property of construction material. According to one aspect, a material property gauge operable to determine a property of construction material is disclosed. The gauge may include an electromagnetic sensor operable to measure a response of construction material to an electromagnetic field. Further, the electromagnetic sensor may be operable to produce a signal representing the measured response by the construction material to the electromagnetic field. An acoustic detector may be operable to detect a response of the construction material to the acoustical energy. Further, the acoustic detector may be operable to produce a signal representing the detected response by the construction material to the acoustical energy. A material property calculation function may be configured to calculate a property value associated with the construction material based upon the signals produced by the electromagnetic sensor and the acoustic detector.
    Type: Grant
    Filed: August 30, 2006
    Date of Patent: September 1, 2009
    Assignee: Troxler Electronic Laboratories, Inc.
    Inventor: Robert Ernest Troxler
  • Patent number: 7573780
    Abstract: Method for survey design including configuring electrodes to reduce near-surface noise in the seismic response from an electroseismic survey of a subterranean formation. Different embodiments of the invention include (1) selective measurement of the surface noise to remove it from the data; (2) suppressing surface noise generation by reducing electric fields in the vicinity of some of the electrodes; (3) creating source signature differences between the near-surface seismic response and the deep response enabling the near surface response to be removed in data processing; (4) applying an external near-surface magnetic field to modulate the near-surface seismic response, enabling it to be removed in processing; and (5) constructing a partial Faraday cage to shield a near-surface region from fields generated by the electrodes.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: August 11, 2009
    Assignee: ExxonMobil Upstream Research Co.
    Inventors: Arthur H. Thompson, Scott C. Hornbostel
  • Publication number: 20090154289
    Abstract: Systems and methods for acquiring seismic data are described, one system comprising one or more seismic sources, a plurality of sensor modules each comprising a seismic sensor configured to sample analog seismic data, each module comprising a comparing unit comprising software; wherein the software in each module tests clock quality by running a sigma-delta modulator from two different clock sources in the node and compares a noise-floor of the modulator when using the different clocks.
    Type: Application
    Filed: December 12, 2007
    Publication date: June 18, 2009
    Inventor: Thomas Uteng Johansen
  • Patent number: 7542851
    Abstract: A method of analyzing results from an underwater controlled source electromagnetic (CSEM) survey of an area that is thought or known to contain a subterranean hydrocarbon reservoir is described. The method is based on a wavefield extrapolation of narrow-band electromagnetic field data obtained from pairs of source and receiver locations. The data comprise a plurality of discrete frequencies between 0.01 Hz and 60 Hz. The wavefield extrapolation is performed for each of these discrete frequencies to provide distributions of electromagnetic scattering coefficient as a function of position and depth beneath the survey area. These distributions may then be combined to provide a displayable image of electromagnetic scattering coefficient. The method is able to quickly provide a displayable image that is readily interpretable.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: June 2, 2009
    Assignee: OHM Limited
    Inventor: Michael Tompkins
  • Publication number: 20090092002
    Abstract: A method for wireless communication in a seismic sensor network is disclosed. The method comprises providing a first acoustic device having at least one seismic sensor with communication and control data to communicate over an acoustic energy wave on a first communications channel. The first acoustic device generates the acoustic energy wave with a first wave intensity. The first acoustic device is configured to receive a reflection of the generated wave at a prescribed signal sensitivity level based on a network configuration. If the first wave intensity is below the prescribed signal sensitivity level, the first wave intensity of the acoustic energy wave is tuned to the prescribed signal sensitivity level to interpret the communication and control data provided by the first communications channel.
    Type: Application
    Filed: October 5, 2007
    Publication date: April 9, 2009
    Inventors: Keith A. Souders, Jamal Haque, Andrew W. Guyette, Edward R. Prado, Richard Pereira Soares, JR.
  • Publication number: 20090086574
    Abstract: A seismic energy source includes at least a first and a second acoustic radiator operatively coupled to a non-linear medium proximate an upper limit of formations in the Earth's subsurface. The first and second acoustic radiators are configured to convert electrical energy directly into acoustic energy. The source includes means for operating the first and the second acoustic radiator at respective first and second frequencies. The first and second frequencies are selected such that substantially no acoustic energy propagates through the non-linear medium. The first and the second frequencies are selected such that a difference therebetween is swept through a range of frequencies of seismic energy capable of propagating through the Earth's subsurface to at least one acoustic impedance boundary within the Earth's subsurface.
    Type: Application
    Filed: October 2, 2007
    Publication date: April 2, 2009
    Inventors: Gary Lee Scott, William B. Pramik
  • Publication number: 20090040870
    Abstract: To attenuate a surface seismic wave, seismic sensors having a predetermined orientation with respect to a surface are provided, where the seismic sensors receive seismic waves including a seismic wave reflected from a subterranean structure and the surface seismic wave propagating in at least a first direction that is generally parallel to the surface. A signal that represents a partial derivative of a wavefield containing the surface seismic wave is provided, and the signal is integrated to obtain a response in which the surface seismic wave is attenuated.
    Type: Application
    Filed: August 9, 2007
    Publication date: February 12, 2009
    Inventor: Masahiro Kamata
  • Publication number: 20080285379
    Abstract: An apparatus for collecting geophysical information may include a geophysical information station disposed along a seismic communication cable. A bypass circuit responsive to a command signal is in communication with a switching circuit that is operable to route electrical power, commands, data or a combination to bypass the geophysical information station in response to the command signal. An exemplary method for bypassing a geophysical information station in a geophysical information collection system includes sending a command signal to a bypass circuit and activating one or more switching circuits using the bypass circuit to route electrical power, commands, data or a combination to bypass the geophysical information station in response to the command signal.
    Type: Application
    Filed: May 16, 2008
    Publication date: November 20, 2008
    Inventors: Allen J. Bishop, Leon Lovheim, Magne Oldervoll, Samuel K. Ingram, Stephen Tom D. Gray
  • Patent number: 7418350
    Abstract: A method and apparatus for estimating a seismic velocity field from seismic data including time-amplitude representations associated with source-receiver locations spaced apart by an offset distance and having a midpoint therebetween, the seismic data being arranged into common midpoint (CMP) gathers associated with respective CMP locations. A control plane having an edge intersecting a plurality of the CMP locations is defined, an initial velocity field for the control plane is produced, the initial velocity field including a plurality of time-velocity values for each of the CMP locations; and an optimized velocity field for the control plane is produced by adjusting the time-velocity values for each of the CMP locations in response to trends, relative to offset distance, in time values, associated with common seismic events, until said optimized velocity field satisfies a condition.
    Type: Grant
    Filed: June 7, 2006
    Date of Patent: August 26, 2008
    Assignee: Data Modeling Inc.
    Inventors: Kerry James Stinson, Shlomo Levy, Wai-Kin Chan, Edward Charles Crase
  • Publication number: 20080187006
    Abstract: The disclosure herein provides a method of acquiring seismic data that includes receiving seismic signals at one or more sensors; sampling the received seismic signals into a plurality of samples, each sample having a same bit length; arranging the samples into a plurality of packets; compressing the plurality of packets by varying a time interval between transmissions of at least some of the packets; and transmitting the compressed packets.
    Type: Application
    Filed: January 31, 2008
    Publication date: August 7, 2008
    Applicant: ION Geophysical Corporation
    Inventors: Keith Elder, Steven Kooper, Andras Feszthammer, Donald E. Clayton, Henry T. Polk
  • Publication number: 20080137475
    Abstract: Disclosed is a system for detecting seismic events, the system including a plurality of seismic receivers, at least one of the receivers in the plurality adapted for: monitoring seismic activity, providing an alert to at least another of the receivers in the plurality upon detection of a seismic event, and triggering the monitoring in the at least another of the receivers in the plurality. A method and computer program product for monitoring seismic events is also disclosed.
    Type: Application
    Filed: November 6, 2007
    Publication date: June 12, 2008
    Applicant: MAGNITUDE SPAS
    Inventor: Christophe Maisons
  • Publication number: 20080106401
    Abstract: Certain embodiments of the present invention provide a system for improved signal processing within a remote sensor system. The system includes a detection component and a processing component. The detection component is adapted to detect an event and generate a signal based at least in part on the event. The processing component adapted to determine an envelope of the signal based at least in part on a situation. Certain embodiments of the present invention provide a method for improved signal processing within a remote sensor system. The system includes detecting an event, generating a signal based at least in part on the event, and determining an envelope of the signal based at least in part on a situation.
    Type: Application
    Filed: November 7, 2006
    Publication date: May 8, 2008
    Inventors: Paul Edward Voglewede, Scott J. Cloutier, Michael D. Jordan
  • Publication number: 20080105426
    Abstract: A method for estimating a permeability of a formation surrouning a borehole comprises applying transient well-test conditions to the borehole. A portion of the formation is excited with an acoustic signal. The acoustic response corresponding to the acoustic exciting is measured with an acoustic receiver located within the borehole. The permeability of the formation is estimated using the acoustic response.
    Type: Application
    Filed: July 20, 2005
    Publication date: May 8, 2008
    Applicant: Schlumberger Tecnhnoloogy Corporation
    Inventors: Cao Di, Jean-Pierre Delhomme, Yves Manin, Marwan Charara, Philippe Lacour-Gayet
  • Publication number: 20080049550
    Abstract: A method, apparatus and system for acquiring land seismic data includes acquiring seismic data with a first autonomous seismic data acquisition unit and a second autonomous seismic data acquisition unit wherein each acquisition unit comprises a plurality of digitally controlled temperature-compensated crystal oscillators. Oscillator-based timing signals are acquired that are associated with the plurality of digitally controlled temperature-compensated crystal oscillators and a time correction is determined to apply to the seismic data acquired with the first autonomous seismic data acquisition unit. The time correction is determined using the oscillator-based timing signals from the first and second autonomous seismic data acquisition units.
    Type: Application
    Filed: August 22, 2006
    Publication date: February 28, 2008
    Applicant: Global Geophysical Services, Incorporated
    Inventors: Thomas J. Fleure, Larry Walker
  • Publication number: 20080008030
    Abstract: A seismic survey apparatus includes a plurality of serially connected electrical nodes; a power supply capable of supplying power to the electrical nodes and detecting a voltage leakage among the electrical nodes; and a software component capable of locating the leakage upon its detection. A method for use in seismic surveying includes powering a plurality of serially connected electrical nodes in a seismic surveying system; automatically detecting a voltage leakage among the electrical nodes on the power domain; and automatically locating the detected voltage leakage.
    Type: Application
    Filed: December 18, 2006
    Publication date: January 10, 2008
    Inventors: Jostein Fonneland Pettersen, Sylvain Petithomme
  • Patent number: 7286442
    Abstract: A marine seismic exploration method and system comprised of continuous recording, self-contained ocean bottom pods characterized by low profile casings. An external bumper is provided to promote ocean bottom coupling and prevent fishing net entrapment. Pods are tethered together with flexible, non-rigid, non-conducting cable used to control pod deployment. Pods are deployed and retrieved from a boat deck configured to have a storage system and a handling system to attach pods to cable on-the-fly. The storage system is a juke box configuration of slots wherein individual pods are randomly stored in the slots to permit data extraction, charging, testing and synchronizing without opening the pods. A pod may include an inertial navigation system to determine ocean floor location and a rubidium clock for timing. The system includes mathematical gimballing. The cable may include shear couplings designed to automatically shear apart if a certain level of cable tension is reached.
    Type: Grant
    Filed: October 25, 2005
    Date of Patent: October 23, 2007
    Assignee: Fairfield Industries, Inc.
    Inventors: Clifford H. Ray, Glenn D. Fisseler, Hal B. Haygood
  • Patent number: 7203342
    Abstract: A method of extracting desired features from a cellular image including the steps of: (a) selecting an initial cell within the image; (b) selecting an additional cell, near the initial cell, appearing to be associated with a desired feature; (c) repeating step (b) for further cells, near at least one of the previously selected cells, appearing to be associated with said feature, until selection termination criteria are satisfied; and (d) repeating steps (a) through (c) for other initial cells. The method is particularly adept at extracting relatively weakly defined features in relatively noisy images, such as extracting faults or geologic horizons from 2D or 3D seismic data. A method of editing/filtering the features utilizing a stereo net is also disclosed. Related computer system and computer program products for implementing the method are also described.
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: April 10, 2007
    Assignee: Schlumberger Technology Corporation
    Inventor: Stein Inge Pedersen
  • Patent number: RE40321
    Abstract: A method for surface estimation of reservoir properties, wherein location of and average earth resistivities above, below, and horizontally adjacent to the subsurface geologic formation are first determined using geological and geophysical data in the vicinity of the subsurface geologic formation. Then dimensions and probing frequency for an electromagnetic source are determined to substantially maximize transmitted vertical and horizontal electric currents at the subsurface geologic formation, using the location and the average earth resistivities. Next, the electromagnetic source is activated at or near surface, approximately centered above the subsurface geologic formation and a plurality of components of electromagnetic response is measured with a receiver array. Geometrical and electrical parameter constraints are determined, using the geological and geophysical data.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: May 20, 2008
    Assignee: ExxonMobil Upstream Research Co.
    Inventor: Leonard J. Srnka
  • Patent number: RE41829
    Abstract: A method for seismic exploration using nonlinear conversions between electromagnetic and seismic energy, with particular attention to the electromagnetic source waveform used. According to the invention, seismic returns from a source waveform are correlated with a reference waveform, with both waveforms custom designed to minimize both correlation side lobes and interference from linear electroseismic effects. A waveform element is selected which may be sequenced by a binary or similar digital code embodying the desired custom design to generate an input sweep with the needed depth penetration and noise suppression. Correlation of the seismic response with the reference waveform in a data processing step mathematically aggregates the seismic response from the input sweep into a single wavelet. Preferred binary digital codes include prescribed variations of maximal length shift-register sequences. Also, an apparatus for generating the desired waveforms.
    Type: Grant
    Filed: August 5, 2004
    Date of Patent: October 19, 2010
    Assignee: ExxonMobil Upstream Research Co.
    Inventors: Scott C. Hornbostel, Arthur H. Thompson, Thomas C. Halsey, Robert A. Raschke, Clint A. Davis