Seismic Prospecting Patents (Class 367/14)
  • Patent number: 7196634
    Abstract: A method of predicting earthquakes includes the step of positioning a first transducer array adjacent to a seismically active region and below the water table, i.e., within the zone of saturation. The first transducer array includes a first plurality of seismometers, at least one first clock, and at least one first digitizer. The at least one first clock is in communication with at least one of the first plurality of seismometers, and the at least one first digitizer also is in communication with at least one of the first plurality of seismometers. The method also includes the steps of detecting a plurality of wave movements resulting from dilation of the crust of the Earth prior to an earthquake, and converting at least one of the wave movements into a first voltage. The method further includes the step of discriminating between wave movements resulting from dilation of the crust of the Earth and movements resulting from at least one other event.
    Type: Grant
    Filed: December 31, 2003
    Date of Patent: March 27, 2007
    Assignee: Science Horizons, Inc.
    Inventor: J. Theodore Cherry
  • Patent number: 7117093
    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: March 2, 2004
    Date of Patent: October 3, 2006
    Assignee: Data Modeling Inc.
    Inventors: Kerry James Stinson, Shlomo Levy, Wai-Kin Chan, Edward Charles Crase
  • Patent number: 7078619
    Abstract: A universal seismic data acquisition module includes independent environmental isolation chambers for essential signal processing circuitry and for cable connection unions. Cable connection unions are rapidly replaced without opening the main protective chamber. Different connector types required for the many data transmission cable designs needed to service a wide range of survey conditions are more easily accommodated than in conventional single chamber designs. The module is rugged and suitable for operating in a wide range of physical environments including lake or sea immersion to substantial water depths, desert, arctic and others. Need for investment in multiple module types for varying survey conditions is thereby reduced without compromising capacity.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: July 18, 2006
    Assignee: Geo-X Systems, Ltd.
    Inventor: Donald G. Chamberlain
  • Patent number: 7042801
    Abstract: Methods are disclosed employing seismic waves having infrasonic frequencies in the range of about 0.1–20 Hz for generating electromagnetic waves of similar infrasonic frequency in hydrocarbon bearing subterranean formations located at depths up to about 5000 meters, said electromagnetic waves having sufficient voltage amplitudes for detection at the earth's surface. Also disclosed are seismic sources capable of generating infrasonic seismic waves of sufficient amplitude for generating electromagnetic waves in hydrocarbon bearing formations at depths up to 5000 meters, said electromagnetic waves having voltage amplitudes sufficient for detection at the earth's surface.
    Type: Grant
    Filed: June 9, 2004
    Date of Patent: May 9, 2006
    Assignee: SeismoElectric Soundings, Inc.
    Inventor: Andrey Berg
  • Patent number: 7024021
    Abstract: The invention is a method for performing a stratigraphically-based seed detection in a 3-D seismic data volume. The method incorporates criteria that honor the layered nature of the subsurface so that the resulting seismic objects are stratigraphically reasonable. The method may be used to extract from a seismic data volume all seismic objects that satisfy the input criteria. Alternatively, the method may be used to determine the size and shape of a specific seismic object in a seismic data volume.
    Type: Grant
    Filed: September 3, 2003
    Date of Patent: April 4, 2006
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Paul A. Dunn, Marek K. Czernuszenko
  • Patent number: 6915875
    Abstract: A plurality of heavy mass irregularities attached to an inner wall of the drill collar attenuate waves traveling through the collar. The plurality of heavy mass irregularities are spaced and sized for the maximum attenuation of acoustic pulses in a predetermined frequency range. The mass irregularities may be rings firmly coupled to the outer surface of the collar. Alternatively, the mass irregularities may be rings firmly coupled to the outer collar surface by neck pieces, extending inwardly from the inner circumference of the ring. The mass irregularities may be made of steel or tungsten. In another preferred embodiment, the mass irregularities are asymmetrically coupled to an outer collar wall for providing preferential directional attenuation.
    Type: Grant
    Filed: January 10, 2002
    Date of Patent: July 12, 2005
    Assignee: Baker Hughes Incorporated
    Inventors: Vladimir Dubinsky, Alexei Bolshakov
  • Patent number: 6891733
    Abstract: A seismic data acquisition module includes a motherboard that is environmentally protected as a independent unit by an integral sheath, envelope or encapsulating cover. The motherboard unit is suitably configured for rapid and frequent manual removal from the interior cavity of a protective outer housing for compact and more secure packaging as well as more convenient transport over great distances, if necessary, to successively different survey sites. At a new survey site, the motherboard units may be inserted into more bulky but also more rugged or waterproof outer housings that are provided with environmentally tight cable connectors. The outer housings, having a capital value of only a fraction of the electronic motherboard units, may have arrived at the new site at a different time and may even be distributed in the new survey field at the time the motherboard units arrive.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: May 10, 2005
    Assignee: Geo-X Systems, Ltd.
    Inventor: Ian Mark Strang
  • Patent number: 6883638
    Abstract: Method for operating and testing a sensor assembly (210). The sensor assembly (210) preferably includes accelerometers with axes of sensitivity orthogonal to each other. The method preferably includes determining sensor tilt angle, determining the position of the sensor, and synchronizing the operation of the sensor.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: April 26, 2005
    Assignee: Input/Output, Inc.
    Inventors: Peter Maxwell, Lawrence P. Behn, Eugene D. Bednar, Jeffery C. Gannon, Michael Arthur Corrigan, Glen Ragan, Dale J. Lambert, Henry Thomas Polk, Steven L. Roche, Wilfred Roy Bertrand, David Wilson, Byron Lee Cain, Michael George McMahon, John C. Downey Jr., Keith Elder
  • Patent number: 6870482
    Abstract: A method of predicting earthquakes includes the step of positioning a first transducer array adjacent to a seismically active region and at least about 3 meters below the surface of the crust of the Earth. The first transducer array includes a first plurality of seismometers, at least one first clock, and at least one first digitizer. The at least one first clock is in communication with at least one of the first plurality of seismometers, and the at least one first digitizer also is in communication with at least one of the first plurality of seismometers. The method also includes the steps of detecting a plurality of wave movements resulting from dilation of the crust of the Earth prior to an earthquake, and converting at least one of the wave movements into a first voltage. The method further includes the step of discriminating between wave movements resulting from dilation of the crust of the Earth and movements resulting from at least one other event.
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: March 22, 2005
    Assignee: Science Horizons, Inc.
    Inventor: J. Theodore Cherry
  • Patent number: 6859416
    Abstract: The present invention relates to an apparatus and a method for analyzing the correlation geophysical data and seismic data, physical data monitoring apparatus and method, and an earthquake monitoring method.
    Type: Grant
    Filed: June 12, 2003
    Date of Patent: February 22, 2005
    Inventor: Hiroyuki Inubushi
  • Patent number: 6837332
    Abstract: An apparatus (10) and method are disclosed for eliminating a noise signal from at least one source during an acoustic measurement of a subsurface geological formation or borehole. The apparatus (10) includes a longitudinal body for positioning in the borehole and a transmitter (22) supported by the body for transmitting acoustic signals into the formation and borehole. A sensor (23), substantially isolated within the body, is used to detect one or more noise signals and a receiver (24) is carried by the body for receiving acoustic signals traversing the formation and borehole, and for receiving one or more noise signals.
    Type: Grant
    Filed: March 22, 1999
    Date of Patent: January 4, 2005
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Paul F. Rodney
  • Patent number: 6823963
    Abstract: The invention provides an instrument suitable for measuring seismic waves in an environment which comprises a wave guide through which a seismic wave may propagate substantially without dispersion wherein the wave guide is provided with means for measuring its deformation.
    Type: Grant
    Filed: August 15, 2002
    Date of Patent: November 30, 2004
    Assignee: European Community
    Inventors: Carlo Albertini, Kamel Labibes
  • Publication number: 20040190374
    Abstract: An earth penetrating apparatus includes a cutting tool and a sensor housing. A radar unit, rate sensor unit, processor, and transmitter are provided in the sensor housing. An antenna arrangement is coupled to the radar unit and configured for transmitting and receiving electromagnetic signals in a relatively forward and/or lateral looking direction relative to a distal end of the cutting tool. The rate sensor unit may include one or both of a gyroscope and an accelerometer. The processor receives radar data from the radar unit indicative of subsurface strata and obstacles respectively located generally forward and/or lateral of the cutting tool, and receives displacement data from the rate sensor unit indicative of one or both of longitudinal and rotational displacement of the cutting tool. The transmitter is configured for transmitting one or both of the radar data and the displacement data to an aboveground location.
    Type: Application
    Filed: April 2, 2004
    Publication date: September 30, 2004
    Applicant: Vermeer Manufacturing Company
    Inventors: Kevin L. Alft, Gregory W. Draper, Hans Kelpe
  • Publication number: 20040125694
    Abstract: A body device includes: a plurality of sound sources; a speaker and a headphone for outputting sound signals from those sound sources; and a mode setting unit capable of setting a single mode, in which the sound signals from one sound source are output in response to an operation from a front operation unit, and a dual mode in which, while the sound signals from one sound source are being output from the speaker, the voice signals from another sound source are output from the headphone; an external connection unit for connecting an external DVD device with the outside; and a control unit for controlling a mode setting unit so that the body device may be turned ON in the dual mode when a power ON demand signal from the external DVD device or a rear operation unit is detected.
    Type: Application
    Filed: September 25, 2003
    Publication date: July 1, 2004
    Applicant: Clarion Co., Ltd.
    Inventors: Kuniko Yamasaki, Yoshihide Koyama
  • Publication number: 20040125695
    Abstract: A method of monitoring a microseismic event includes detecting the event to produce a first signal dependent on the event. The first signal includes noise at a frequency of, for example 50 Hz. A first sample of the first signal is taken. Then a second sample of the first signal is taken, the second sample occurring n/f seconds after the first sample, where n is an integer (e.g. 1). Subtracting the first and second samples from each other produces a farther signal dependent on the event in which the noise has been at least partly compensated for.
    Type: Application
    Filed: October 21, 2003
    Publication date: July 1, 2004
    Inventor: Robert Hughes Jones
  • Publication number: 20040125696
    Abstract: A method of monitoring microseismic events in a hydrocarbon production reservoir provided with a well comprising inner production tubing and an outer casing. The method includes providing one or more microseismic sensors in contact with the outer casing of the well, and taking steps to enhance the ability of the microseismic sensors to detect microseismic signals over the background noise generated by fluid flow inside the inner production tubing is enhanced. An installation suitable for carrying out such a method is also disclosed.
    Type: Application
    Filed: October 28, 2003
    Publication date: July 1, 2004
    Inventors: Robert Hughes Jones, Ian S. Brown, Andrew John Jupe
  • Publication number: 20040114463
    Abstract: A clamp mechanism for actively coupling an in-well seismic station to the casing of a well is disclosed. The clamp mechanism is capable of associating a sensor to production tubing for deployment in the well and is capable of actively coupling the sensor to the casing of the well. The clamp mechanism includes a body capable of being coupled to the deployment member. A carrier mechanism is attached to the sensor and positions adjacent the body. A release mechanism releases the carrier mechanism when subjected to a predetermined pressure in the well or when subjected to fluid in the well for a predetermined amount of time. A biasing mechanism is disposed between the body and the carrier mechanism and displaces the carrier mechanism with attached sensor towards the surface of the casing when released. A guiding mechanism guides the displacement of the carrier mechanism towards the surface of the casing.
    Type: Application
    Filed: October 3, 2003
    Publication date: June 17, 2004
    Inventors: Arne Berg, Sverre Knudsen
  • Publication number: 20040109387
    Abstract: The invention comprises a system for processing seismic data to estimate time shift resulting from velocity anisotropy in the earth's subsurface. A gather of seismic data traces is formed and selected seismic data traces included in said gather within selected time windows are cross-correlated to estimate the time shift in the seismic data traces included in said gather resulting from velocity anisotropy in the earth's subsurface.
    Type: Application
    Filed: October 20, 2003
    Publication date: June 10, 2004
    Inventors: Edward Louis Jenner, Martin CCarroll Williams
  • Patent number: 6728165
    Abstract: A system for sensing subterranean acoustic waves emitted from an acoustic source includes a plurality of laser sources, a plurality of subterranean optical sensors, at least one optical detector, and electronics. The laser sources each emit light at a different frequency. The subterranean optical sensors receive the light and alter the light in response to the acoustic waves. The optical detector receives the altered light and outputs an electrical signal. The electronics receives the electrical signal and converts it into seismic data format. The hydrophone for sensing the acoustic signals is able to operate at pressures of at least 5,000 psi and temperatures of at least 130 degrees Celsius. A hydrophone may be housed in a cable having a diameter of less than about 1.5 inches. The hydrophone's sensor preferably includes a reference mandrel, two sensing mandrels, and a telemetry can, all of which are aligned in a coaxial, end-to-end configuration to reduce the profile of the hydrophone.
    Type: Grant
    Filed: October 29, 1999
    Date of Patent: April 27, 2004
    Assignee: Litton Systems, Inc.
    Inventors: John A. Roscigno, Craig W. Hodgson, Donald A. Frederick, William C. Knaack
  • Publication number: 20040062145
    Abstract: The invention is a method for performing a stratigraphically-based seed detection in a 3-D seismic data volume. The method incorporates criteria that honor the layered nature of the subsurface so that the resulting seismic objects are stratigraphically reasonable. The method may be used to extract from a seismic data volume all seismic objects that satisfy the input criteria. Alternatively, the method may be used to determine the size and shape of a specific seismic object in a seismic data volume.
    Type: Application
    Filed: September 3, 2003
    Publication date: April 1, 2004
    Applicant: EXXONMOBIL UPSTREAM RESEARCH COMPANY
    Inventors: Paul A. Dunn, Marek K. Czernuszenko
  • Patent number: 6691075
    Abstract: A model seismic image of a subsurface seismic reflector is constructed, wherein a set of source and receiver pairs is located, and a subsurface velocity function is determined. Specular reflection points are determined on the subsurface seismic reflector for each of the source and receiver pairs. A Fresnel zone is determined on the subsurface seismic reflector for each of the specular reflection points, using the subsurface velocity function. One or more seismic wavelets are selected and a set of image points is defined containing the subsurface seismic reflector. A synthetic seismic amplitude is determined for each of the image points by summing the Fresnel zone synthetic seismic amplitude for all of the Fresnel zones that contain the image point, using the seismic wavelets. The model seismic image of the subsurface seismic reflector is constructed, using the synthetic seismic amplitudes at the image points.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: February 10, 2004
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Graham A. Winbow, William A. Schneider, Jr.
  • Patent number: 6664788
    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: April 22, 2002
    Date of Patent: December 16, 2003
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Scott C. Hornbostel, Arthur H. Thompson, Thomas C. Halsey, Robert A. Raschke, Clint A. Davis
  • Publication number: 20030218936
    Abstract: A universal seismic data acquisition module includes independent environmental isolation chambers for essential signal processing circuitry and for cable connection unions. Cable connection unions are rapidly replaced without opening the main protective chamber. Different connector types required for the many data transmission cable designs needed to service a wide range of survey conditions are more easily accommodated than in conventional single chamber designs. The module is rugged and suitable for operating in a wide range of physical environments including lake or sea immersion to substantial water depths, desert, arctic and others. Need for investment in multiple module types for varying survey conditions is thereby reduced without compromising capacity.
    Type: Application
    Filed: May 13, 2003
    Publication date: November 27, 2003
    Applicant: Geo-X Systems, Ltd.
    Inventor: Donald G. Chamberlain
  • Publication number: 20030210609
    Abstract: A method of seismic surveying comprising the steps of actuating the or each vibrator in a first vibrator group at time T0, and subsequently actuating the or each vibrator in a second vibrator group at time T1 that satisfies T0<T1<T0+S1+L where S1 is the sweep time of the first vibrator group and L is the listening time. At least one of the first vibrator group and the second vibrator group comprises at least two vibrators. The first group and the second group of vibrators may be the same group, or they may be different groups. This method enables the time required to complete a seismic survey to be reduced compared to the prior art “simultaneous shooting” and “slip-sweep shooting” techniques.
    Type: Application
    Filed: March 31, 2003
    Publication date: November 13, 2003
    Applicant: WESTERNGECO L.L.C. a Delaware Limited Liability Company
    Inventor: Benjamin Peter Jeffryes
  • Publication number: 20030174580
    Abstract: An energy impulse generator for transferring an energy pulse to a surface. The generator exchanges messages with a computing means through a communication interface. The generator comprises a housing. The generator further comprises an impact assembly movably mounted within the housing between at least a resting position, a latched position and an impact position. In the impact position, the impact assembly transfers the energy pulse to the surface. The generator also includes an energy storage means attached to the impact assembly. In the latched position, the energy storage means is capable of releasing a specified amount of energy to the impact assembly such that upon release of the specified amount of energy the impact assembly moves from the latched position to the impact position then returns to the resting position. The computing means controls the release of the specified amount of energy to the impact assembly.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 18, 2003
    Inventor: Daniel Rioux
  • Publication number: 20030174579
    Abstract: A sensor for detecting an acceleration on a surface. The sensor exchanging messages with a computing means through a communication interface. The sensor comprises an accelerometer for outputting a signal representative of the acceleration and an interface unit comprising a transmitting circuit. The interface unit receives the signal representative of the acceleration and modulates the same for transmission to the computing means.
    Type: Application
    Filed: December 20, 2002
    Publication date: September 18, 2003
    Inventor: Daniel Rioux
  • Patent number: 6595285
    Abstract: A method and device for emitting radial seismic waves in a material medium by electromagnetic induction, used notably for generating seismic waves in cased or uncased wells or in a water mass is disclosed. Emission of radial waves is essentially obtained by radially expanding a metal tube (1) under the effect of a magnetic pressure generated by electromagnetic induction with elastic waves being created in the medium under the effect of this expansion. The magnetic pressure is obtained by connecting a coil (2) in line with the tube to a current generator (3). The winding pitch of coil (2) can be constant or variable. Tube (1) can for example be added into a well or hole or it can be a tube portion of a cased well.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: July 22, 2003
    Assignee: Institut Francais du Petrole
    Inventors: Jean-Claude Dubois, Patrick Meynier
  • Patent number: 6588980
    Abstract: An underwater cable deployment system includes a series of cables, pre-wound on a set of reels, disposed upon a pallet and connected to a distribution hub on the pallet. The pallet is lowered to the ocean floor and a remotely operated vehicle (ROV) is also lowered to the ocean floor to deploy cables to form a predetermined array on the ocean floor. Preferably, the pallet is delivered to the ocean floor in advance by crane with the reel-mounted sensor array cables being deployed later by ROV. Optionally, the ROV may include a jetting package configured to bury the sensor cable as it is being deployed from the reel on the ROV.
    Type: Grant
    Filed: May 15, 2001
    Date of Patent: July 8, 2003
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Peter Johnson Worman, Charles Russell Yemington, Jason Charles McCanna, James Alan Soliah, David Earl LaPorte
  • Publication number: 20030123325
    Abstract: In the present invention, a seismic receiver contains an onboard digitizer that samples and converts a signal from detected seismic energy into the digital domain. The receiver contains an analog to digital converter, a transmission circuitry, and a link to the seismic detection circuitry. The signal from the seismic detection circuitry is converted into a digital signal, which is then relayed to the data recorder. These components are all resident to the receiver itself. Additional control circuitry is employed to provide clocking and testing functions. These receivers communicate with one another, and provide sampled seismic data on an individual basis. The components may be prepared on a PCB and put inside the receiver cap. The PCB may be flexible in nature, as to provide a maximum of surface mounted components in the smallest amount of space.
    Type: Application
    Filed: December 7, 2001
    Publication date: July 3, 2003
    Inventor: Geza Nemeth
  • Patent number: 6587055
    Abstract: In a remote data acquisition system a control unit transmits a radio signal simultaneously to a plurality of remote units. Each remote unit receives the radio signal at different times dependent on various system delay factors. A compensating delay is added in each remote unit in order to trigger each remote unit for data acquisition at the same time.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: July 1, 2003
    Assignees: Fairfield Industries, Inc., Wireless Systems International, Ltd.
    Inventors: Paul George Turner, Steven Anthony Meade, Richard Michael Bennett
  • Patent number: 6573855
    Abstract: In a three-dimensional exploring method for finding location of a buried object by transmitting a wave signal (4) by means of e.g.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: June 3, 2003
    Assignee: Osaka Gas Co., Ltd.
    Inventors: Hideki Hayakawa, Akira Kawanaka, Yasuhiro Takesue
  • Publication number: 20030099155
    Abstract: A seismic sensor contains a geophone (4) disposed within a housing (12). The sensor is also provided with locking means (14, 19, 21) that can either lock the geophone 4 relative to the housing, or can allow the geophone to rotate within the housing.
    Type: Application
    Filed: November 19, 2002
    Publication date: May 29, 2003
    Inventors: Didier Dominguez, Irene Gabler, Jacques Orban
  • Publication number: 20030021184
    Abstract: A method and system for extraction of P-wave and S-wave velocities from multicomponent seismic data by joint velocity inversion is provided. The method and system accurately invert the P-wave and S-wave velocities from multicomponent seismic data via joint velocity inversion. The joint velocity inversion has proven to be an effective tool to extract the interval P-wave and shear wave velocities by decomposition and reconstruction of the P-wave and S-wave velocity fields. The method and inversion process is valid for land and marine seismic data, including surface reflection seismic ocean bottom seismic and vertical cable seismic data.
    Type: Application
    Filed: June 8, 2001
    Publication date: January 30, 2003
    Inventor: Yaohui Zhang
  • Publication number: 20020181326
    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: Application
    Filed: April 22, 2002
    Publication date: December 5, 2002
    Inventors: Scott C. Hornbostel, Arthur H. Thompson, Thomas C. Halsey, Robert A. Raschke, Clint A. Davis
  • Publication number: 20020163857
    Abstract: The invention comprises the generation of seismic signals at a survey site at which seismic sensors are deployed by dropping mass units from an overflying aircraft. The mass units will impact the earth's surface at said survey site to generate seismic signals. The seismic sensors are utilized to detect the resulting seismic signals.
    Type: Application
    Filed: March 18, 2002
    Publication date: November 7, 2002
    Inventors: Phillip Andrew Bahorich, Michael Stephen Bahorich
  • Patent number: 6476608
    Abstract: A method and apparatus for low cost, convenient prospecting and surveys of subsurface structures using seismoelectric signals, as well as laboratory analysis of geological samples. The seismoelectric signals come from seismic waves generated by sources which can be applied or natural. The seismoelectric signals are generated with the same velocity and frequency of the generating seismic waves, then induce secondary electromagnetic signals which travel at their own much higher speed. The seismoelectric signals thus may be measured with electrodes or antennas. Electrodes may be disposed within a borehole or on the surface. The method allows use of geophone data, but does not require it. The it source of the seismoelectric signals, being a moving seismic wave front, conveys continuous, whole body information on the structures underground, in much the same way as seismic ware data, but in the form of simpler, easier to capture seismoelectric signals. Reflection and refraction of seismic waves can be ascertained.
    Type: Grant
    Filed: March 14, 1999
    Date of Patent: November 5, 2002
    Inventor: Chi Dong
  • Publication number: 20020159330
    Abstract: The invention is titled Electrical Power from Road Seismic Energy. The invention consists of key concepts and proposed procedures to provide an environmentally friendly alternative source of electrical power. The invention is a description of methodology for producing electrical energy by the placement of transducers near and underneath highways. The seismic energy generated by passing traffic excites the transducers and the output of multiple transducers is combined to produce economically useful amounts of electrical power. The specific implementation of the invention is a battery charger that would also be used as the inventor's tests harness to evaluate the economics of the invention. The amount of potential energy generated by passing traffic on a highway is not generally appreciated. An analogy would be a car passing over a pontoon bridge, the pontoons rising and lowering in the water and generating waves in the water.
    Type: Application
    Filed: April 30, 2001
    Publication date: October 31, 2002
    Inventor: Lee Moore
  • Patent number: 6462549
    Abstract: A method and system for determining the location of a microseismic event is disclosed. An electromagnetic sensor measures the electromagnetic energy which is caused by a microseismic event. Seismic data from the microseismic event is measured and recorded using plurality of ground motion sensors. The time at which microseismic event occurred is estimated based at least in part on the time at which electromagnetic energy caused by the microseismic event is received by the electromagnetic sensor. The location of said source of the microseismic event is determined using the estimated occurrence time and the time at which the seismic energy arrived at the ground motion sensors. A method of triggering a seismic recording device is also disclosed. The electromagnetic energy from a microseismic event is measured and recorded using an electromagnetic sensor. The time at which the microseismic event occurred is estimated based on the measured electromagnetic energy.
    Type: Grant
    Filed: April 12, 2000
    Date of Patent: October 8, 2002
    Assignee: Schlumberger Technology Corporation
    Inventors: Andrew Curtis, Sarah Ryan, James Edward Martin
  • Publication number: 20020126574
    Abstract: A two-conductor bidirectional digital telemetry interface between a seismic sensor acquisition/conversion module and a seismic data collection module. The data collection module is configured as a master electronics device and the sensor acquisition/conversion module is configured as a slave electronics device in the telemetry system. The master device provides power to the slave device over the two conductors. The master device transmits portions of commands to the slave device at a first time and the slave device transmits portions of a digital seismic data packet to the master at a different second time in a fixed-duration frame. The frames are transmitted at regular intervals. The outbound commands and inbound data are encoded by block codes. A phase-locked loop in the slave is locked to a master clock in the master by deriving a clock and a sync point from the block-coded commands it receives from the master.
    Type: Application
    Filed: January 10, 2001
    Publication date: September 12, 2002
    Inventors: John C. Downey, Ralph Kruse, Allen J. Bishop, Kent A. Byerly
  • Publication number: 20010006488
    Abstract: An electroacoustic transducer 1 is constituted by a base 24 formed of magnetic material; a magnetic core 22 formed of magnetic material and provided erectly on the base 24; a diaphragm 20 formed of magnetic material and supported with an air gap between the diaphragm and a forward end of the magnetic core; a magnet 25 constituting a magnetic circuit together with the base 24, the magnetic core 22 and the diaphragm 20 so as to provide a magnetostatic field; a coil 23 disposed around the magnetic core 22 for applying an oscillating magnetic field to the magnetic circuit; a housing 30 molded integrally with the base 24 and the magnet 25, and so on. The housing 30 has notch holes 38 extending from a bottom surface thereof to the magnet 25.
    Type: Application
    Filed: December 22, 2000
    Publication date: July 5, 2001
    Inventor: Kazushige Tajima
  • Patent number: 6208585
    Abstract: A sonic or acoustic tool having a transmitter and a receiver and further having a receiver testing and calibration device is disclosed. Methods for testing and tuning acoustic receivers dynamically are also disclosed. The calibration device includes an acoustic signal generator in acoustic communication with a receiver or a plurality of receivers, where the generator generates an acoustic calibration signal or test signal which propagates to each receiver. The receiver response is monitored to determine receiver integrity and tune. Based on the response, the processing unit or units can adjust the receiver response or instruct tuning circuitry associated with the receiver to adjust the receiver response.
    Type: Grant
    Filed: June 26, 1998
    Date of Patent: March 27, 2001
    Assignee: Halliburton Energy Services, Inc.
    Inventor: James W. Stroud
  • Patent number: 6194706
    Abstract: The invention provides for assessing location and/or proximity to a buried or submerged optical fiber cable. A seismic generator creates seismic pulses, at known frequencies, on the ground (or water) at a first location and the synchronous rotation of the polarization state of light transmitted through the optical fiber cable is detected. Other seismic pulses are generated at different locations and the polarization rotation is detected at each such location to locate a closest proximity to the cable, corresponding to a minimum or maximum of polarization rotation. A wireless synchronous signal is generated with the seismic pulses to differentially isolate the polarization rotation signal; and, if desired, to further determine distance between the cable and the source of the seismic pulse.
    Type: Grant
    Filed: May 19, 1999
    Date of Patent: February 27, 2001
    Assignee: Lucent Technologies Inc.
    Inventor: Michael G. Ressl
  • Patent number: 6076630
    Abstract: A marine seismic source for generating acoustic source energy. A housing has a continuous exterior perimeter which is moveable to displace water. Movement of the housing can be accomplished by providing alternating convex and concave exterior surfaces connected with inflection points. The composite shape provides movement inwardly or outwardly, and can be moved with different types of actuators. Piezoelectric elements can be activated to move the housing surfaces and to change the internal housing volume. The resulting pressure pulse provides acoustic source energy useful for the evaluation of subterranean geologic formations and for other purposes.
    Type: Grant
    Filed: February 4, 1999
    Date of Patent: June 20, 2000
    Assignee: Western Atlas International, Inc.
    Inventor: Loran D. Ambs
  • Patent number: 6065562
    Abstract: A seismic vibrator system for imparting compressional and shear wave vibrations into the earth has an earth contacting base with a vertical post. A tubular hub is slidably received on the post in a piston/cylinder relationship. Spaced apart horizontal top and bottom plates are secured to the hub. A mass is slidably supported between the plates. Pistons interconnect the hub and the mass. Hydraulic energy is used to reciprocate the mass vertically on the post and horizontally between the plates.
    Type: Grant
    Filed: July 27, 1998
    Date of Patent: May 23, 2000
    Assignee: Industrial Vehicles International, Inc.
    Inventors: James M. Bird, James M. Bird, Jr., Elmo W. Christensen, Michael G. Grady
  • Patent number: 6038512
    Abstract: This method and system for estimating Earth environmental effects in relation to planetary orbital dynamics provides for integrating seemingly diverse data input sources gathered from historical data, field data, meteorological sensors, satellites, and the like for geophysical, meteorological, archeological and astrophysical purposes to perform comparison, correlation, time and date determinations for historical analysis and future event prediction. Computer systems which are used to collect and store necessary data are linked by the most appropriate transmission means given the location and data transmission characteristics to be networked. A data base module is used to store historical or archival data as well as large input current data.
    Type: Grant
    Filed: January 15, 1999
    Date of Patent: March 14, 2000
    Inventor: Joseph T. Williams
  • Patent number: 6002339
    Abstract: A system for synchronizing a seismic system having multiple subsystems. A control system transmits a message to selected subsystems and an internal subsystem counter is zeroed to a selected epoch. Depending on the message or on an internal instruction code, each subsystem initiates an event or sequence of events synchronized to the selected epoch. The system is based on the relative occurrence of cyclic events and does not depend on the transmission of an absolute time signal. The system is self rectifying, reduces systemic errors, and reduces the data transmission required for system control and operation. The system permits autonomous, asynchronous operation by a subsystem without continuous control by a central controller as a function of time, and can interactively respond to events without intervention from the central controller.
    Type: Grant
    Filed: January 30, 1998
    Date of Patent: December 14, 1999
    Assignee: Western Atlas International, Inc.
    Inventor: Michael W. Norris
  • Patent number: 5999885
    Abstract: An interpretation workstation based apparatus having an "Auto Fault" software stored therein automatically identifies a plurality of fault cuts in each of a plurality of horizons in a seismic data volume in response to a plurality of predetermined "horizon time structures".
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: December 7, 1999
    Assignee: GeoQuest
    Inventors: Peter P. Van Bemmel, Randolph E. F. Pepper, William G. Dillon
  • Patent number: 5903153
    Abstract: A method and apparatus for detecting underground liquids is disclosed in which the electrical potential generated by a seismic shock is detected and measured with respect to a base point insulated from the earth.
    Type: Grant
    Filed: October 18, 1996
    Date of Patent: May 11, 1999
    Assignee: Court Services Limited
    Inventors: Richard Hedley Clarke, John William Aidan Millar
  • Patent number: 5883856
    Abstract: An improved bottom cable for a seismic marine data acquisition system 10. The bottom cable 30 includes a cable section 30b having a bus 48. The cable, along with the cable section and bus, are used to electrically connect a master control unit 40 to first and second modules 32b and 32c, respectively. The bus 48 includes first and second switches 48b and 48c, respectively, located near opposite ends of the bus. In this way, if a leak R1 occurs in the bus, the first and second switches can be opened, thereby electrically isolating the bus and stopping the leak.
    Type: Grant
    Filed: October 31, 1997
    Date of Patent: March 16, 1999
    Assignee: Input/Output, Inc.
    Inventors: Paul Ellington Carroll, Karl Joseph Schuler, Roy Wilson James III
  • Patent number: 5877995
    Abstract: Method and apparatus are provided for a new type of geophysical prospecting. The method applies an electric field to a fluid-containing porous subsurface formation to create a fluid pulse from changes in the polarization of pore fluid dipoles. The fluid pulse propagates in the subsurface as a seismic wave that may be detected by an appropriate array of seismic detectors. The apparatus is a pulsed DC or AC source for generating an applied electric field and a seismic detector.
    Type: Grant
    Filed: May 6, 1991
    Date of Patent: March 2, 1999
    Assignee: Exxon Production Research Company
    Inventors: Arthur Howard Thompson, Grant Alan Gist