To Detect Return Wave Signals Patents (Class 324/337)
  • Patent number: 10345284
    Abstract: A device for surveying the condition of a substrate, in particular a soil sensor, having at least one transmitting coil and at least one, preferably four, receiving coils. The transmitting coil is arranged to generate an electromagnetic primary field and the receiving coil is arranged to receive the electromagnetic secondary field induced in the substrate by the primary field. The transmitting coil and the receiving coil are arranged in a housing which includes electromagnetic radiation shielding material. Also disclosed is an agricultural driven machine including a soil sensor and a method for operating a driven machine.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: July 9, 2019
    Assignee: Geoprospectors GmbH
    Inventor: Michael Pregesbauer
  • Patent number: 10317565
    Abstract: A method of borehole correction for water-based mud includes conveying an induction logging tool along a borehole through a formation, obtaining one or more formation measurements using the tool, obtaining a water-based mud conductivity, performing an oil-based mud inversion on the formation measurements to determine an inverted formation conductivity, calculating a corrected formation conductivity using the water-based mud conductivity and the inverted formation conductivity, and displaying a log based at least in part on the corrected formation conductivity.
    Type: Grant
    Filed: March 10, 2016
    Date of Patent: June 11, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Burkay Donderici, Glenn Andrew Wilson
  • Patent number: 10227863
    Abstract: A method includes cementing a target well with a target well cement comprising resistive cement having resistivity that is greater than a resistivity of a subsurface formation through which the target well passes. The method includes injecting an injected signal into a conductive casing material at least partially surrounded by the target well cement. The method also includes receiving a resulting signal that results from the injecting at a signal receiver disposed within at least one of the target well and a drilling well separated from the target well.
    Type: Grant
    Filed: January 16, 2018
    Date of Patent: March 12, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Hsu-Hsiang Wu, Yijing Fan, Akram Ahmadi Kalateh Ahmad
  • Patent number: 10132950
    Abstract: A system and method for geophysical data collection, for use with resistivity and induced polarization. The system and method include the use of a single voltage reference wire to which all voltage recorders or nodes are connected by means of a piercing wire connector, the voltage recorders providing a measurement of the potential voltage between the reference wire and the ground and allowing for calculation of relative voltage potentials between adjacent recorders.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: November 20, 2018
    Inventor: Glenn Dale Chubak
  • Patent number: 10119880
    Abstract: A first time difference calculation unit calculates a time difference ?t1 between the timing of detection of vibration that indicates the first vibration mode of a pipe P and the timing of detection of vibration that indicates a second vibration mode of the pipe P by processing a result of a measurement . A second time difference calculation unit calculates a time difference ?t2 between the timing of detection of vibration that indicates the first vibration mode of the pipe P and the timing of detection of vibration that indicates the second vibration mode of the pipe P by processing a result of another measurement. A leakage position calculation unit uses the time differences ?t1, ?t2, and a space interval I between the first vibration detection unit and the first time difference calculation unit to calculate a leakage position in the pipe P.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: November 6, 2018
    Assignee: NEC CORPORATION
    Inventors: Soichiro Takata, Shigeru Kasai
  • Patent number: 10082528
    Abstract: Some embodiments relate to power detector including a voltage sensor configured to detect a voltage of a load and a current sensor configured to detect a current of the load. The power detector also includes circuitry configured to introduce a phase delay between the detected voltage of the load and the detected current of the load, thereby producing a voltage measurement and a current measurement. The circuitry is also configured to multiply the voltage measurement and the current measurement.
    Type: Grant
    Filed: December 9, 2015
    Date of Patent: September 25, 2018
    Assignee: MediaTek Inc.
    Inventors: Meng-Hung Chen, Osama K. A. Shana'a, YuenHui Chee, Chiyuan Lu
  • Patent number: 10012751
    Abstract: An apparatus. At least some illustrative embodiments are an apparatus comprising a sensor streamer. The sensor streamer includes at least one seismic streamer section and a first electrode adapter removably attached to the at least one seismic streamer section. The first electrode adapter includes a first electrode, wherein the first electrode is configured to couple to electrical circuitry configured to measure a potential difference between the first electrode at a first potential and a second potential. The conducting member forms a reference potential, wherein the conducting member is floating. The at least one seismic streamer section is without electromagnetic field-sensing components.
    Type: Grant
    Filed: December 5, 2014
    Date of Patent: July 3, 2018
    Assignee: PGS Geophysical AS
    Inventor: Geir Andre Motzfeldt Drange
  • Patent number: 10001580
    Abstract: An electromagnetic (EM) receiver system for measuring EM signals. The EM receiver system includes a frame; a first EM receiver attached to the frame and configured to measure the EM signals within a first frequency range; and a second EM receiver attached to the frame and configured to measure the EM signals within a second frequency range. Corresponding axes of the first and second EM receivers are substantially parallel to each other.
    Type: Grant
    Filed: July 12, 2017
    Date of Patent: June 19, 2018
    Assignee: CGG SERVICES SAS
    Inventors: Philip Miles, Jason Berringer
  • Patent number: 9964386
    Abstract: In one aspect, a modular air sampling system includes a sensor module defining a nose, the sensor module including a sensor for sampling contaminants in the atmosphere. A processing and sending module includes processing electronics in communication with the sensor for receiving a signal from the sensor representative of sampled contaminants in the atmosphere. The processing and sending module further includes a radio frequency transmitter operably coupled to the processing electronics for transmitting a radio frequency signal representative of one or more contaminants sensed by the sensor. In another aspect, a modular air sampling system includes a sensor module containing the sensor, processing electronics, and radio frequency transmitter within the sensor module housing.
    Type: Grant
    Filed: July 7, 2015
    Date of Patent: May 8, 2018
    Assignee: Wilcox Industries Corp.
    Inventor: James W. Teetzel
  • Patent number: 9806928
    Abstract: The present disclosure generally relates to a wireless communication system that provides lower peak to average power ratio (PAPR). In particular, the present disclosure pertains to communication systems and methods for achieving low peak to average power ratio (PAPR) for transmitted symbols of wireless devices. In an aspect, the present disclosure relates to transmitter of a communication system, wherein the transmitter can include a source encoding module that is configured to generate source coded symbols from information to be transmitted by the transmitter, a preset values based multiplication module that is configured to multiply M symbols from the generated source coded symbols with M preset values to generate a first set of multiplied samples, and an N-point IDFT module that is configured to process the first set of multiplied samples to obtain a first set of inverse discrete Fourier transform (IDFT) samples for onward transmission to a receiver.
    Type: Grant
    Filed: August 1, 2016
    Date of Patent: October 31, 2017
    Assignee: Tejas Networks Ltd.
    Inventors: Vinod Kumar Madaiah, Rohith C. Aralikatti
  • Patent number: 9766372
    Abstract: Systems and methods for calibrating resistivity tools in environments with radio-frequency (RF) noise are described herein. The method may include receiving a first measurement from a resistivity tool. The measurement may be taken with the resistivity tool elevated to reduce ground effects on the measurements. The first measurement may be altered by excluding at least some RF noise from the first measurement. The RF noise may be a by product of the resistivity tool being elevated. Additionally, the resistivity tool may be calibrated using the altered first measurement.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 19, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Randolph S. Coles
  • Patent number: 9651707
    Abstract: Methods and data acquisition systems enable joint acquisition of seismic and electromagnetic data in a target area using stand-alone digital recorders.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: May 16, 2017
    Assignee: CGG SERVICES SAS
    Inventors: Brice Tayart De Borms, Charles Boulanger, Baptiste Rondeleux, Jean-Jacques Postel
  • Patent number: 9627753
    Abstract: A system that incorporates the subject disclosure may include, for example, a circuit for determining a magnitude difference between a first signal supplied to an antenna and a second signal radiated by the antenna, determining a phase difference between the first signal supplied to the antenna and the second signal radiated by the antenna, measuring a change in reactance of an antenna, detecting an offset in an operating frequency of the antenna based on one of the magnitude difference, the phase difference, the change in reactance, or any combination thereof, and adjusting a resonant frequency of the antenna to mitigate the offset in the operating frequency of the antenna. Other embodiments are disclosed.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: April 18, 2017
    Assignee: Achilles Technology Management Co II, Inc.
    Inventors: Frank M. Caimi, Mark T. Montgomery, Duane Rabe, Li Chen, Mark W. Kishler
  • Patent number: 9568633
    Abstract: Apparatus and methods are described, such as for obtaining information indicative of a formation resistivity using an electromagnetic formation evaluation tool apparatus. For example, the electromagnetic formation evaluation tool apparatus includes exciter electrodes configured to transmit and receive a formation current. A first exciter electrode may be insulated from a conductive apparatus housing and a second exciter electrode may be coupled to the conductive apparatus housing. Monitor electrodes may be insulated from the conductive apparatus housing. A receiver circuit may be coupled to the monitor electrodes and configured to measure a voltage differential between the monitor electrodes. A power amplifier circuit may be coupled to the first exciter electrode and the conductive apparatus housing and configured to generate the formation current wherein the conductive apparatus housing provides a return path to the power amplifier circuit for the formation current.
    Type: Grant
    Filed: March 21, 2014
    Date of Patent: February 14, 2017
    Assignee: Halliburton Energy Services, Inc.
    Inventors: George David Goodman, Burkay Donderici
  • Patent number: 9519072
    Abstract: An exploration paradigm for detecting and/or characterizing gas hydrate deposits using either electromagnetic or seismic surveys, that accounts for the possibility that gas hydrate may accumulate in vertical or subvertical dikes. Geologic factors, such as the presence of the gas hydrate stability zone, indications that a prolific source of gas exists (or existed) below the gas hydrate stability zone and indications that a high flux of gas could be transported into the gas hydrate stability zone, may be considered as part of an exploration strategy. Data may be collected using seismic techniques, such as a walk-away vertical seismic profile techniques, or electromagnetic surveys that are adapted to detecting the presence of vertical or subvertical dikes. In one example, data processing and acquisition techniques may be adapted to detect hydrate dikes, and do not assume a horizontally isotropic earth model.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: December 13, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Robert Kleinberg, Jakob B.U. Haldorsen
  • Patent number: 9459368
    Abstract: An electromagnetic survey acquisition system includes a sensor cable and a source cable, each deployable in a body of water, and a recording system. The sensor cable includes an electromagnetic sensor thereon. The source cable includes an electromagnetic antenna thereon. The recording system includes a source current generator, a current sensor, and an acquisition controller. The source current generator powers the source cable to emit an electromagnetic field from the antenna. The current sensor is coupled to the source current generator. The acquisition controller interrogates the electromagnetic sensor and the current sensor at selected times in a synchronized fashion.
    Type: Grant
    Filed: October 20, 2014
    Date of Patent: October 4, 2016
    Assignee: PGS Geophysical AS
    Inventors: Andras Robert Juhasz, Gustav Göran Mattias Südow, Ulf Peter Lindqvist
  • Patent number: 9348020
    Abstract: Systems and methods involve generating a baseband signal, up-converting the baseband signal to a radar signal frequency, filtering a lower sideband of the up-converted signal, and transmitting the filtered up-converted signal. Systems and methods also involve receiving a return signal, down-converting the return signal using a signal having a frequency offset from the up-converted signal, filtering the upper sideband of the down-converted return signal, and producing a baseband return signal.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: May 24, 2016
    Assignee: VERMEER MANUFACTURING COMPANY
    Inventors: Alan Wilson-Langman, Kenneth J. Ryerson, Walter Rothe
  • Patent number: 9331375
    Abstract: An underwater antenna assembly (or array thereof) suitable for subsurface RFID tag interrogation in flowing water such as a river. In preferred embodiments, the antenna interrogates RFID tags implanted in aquatic species. The antenna resides in an elongate antenna housing whose cross-sectional shape is preferably a hydrodynamic teardrop shape. A first end of the housing is linked to a pivoting mechanism such that when the pivoting mechanism is held substantially stationary with respect to the water flow, the second end of the housing is free to rotate generally about the first end in a substantially vertical plane parallel to the water flow direction. The length of the antenna housing is advantageously selected to enable the antenna to monitor for signals across substantially the entire water depth.
    Type: Grant
    Filed: June 24, 2013
    Date of Patent: May 3, 2016
    Assignee: West Fork Environmental, Inc.
    Inventors: N. Phil Peterson, Kyle B. Meier
  • Patent number: 9291050
    Abstract: Formation wettability is quantifiably estimated from measurements of dielectric constant and conductivity. In particular, wettability state of formation rock in a subterranean environment is estimated from multi-frequency measurements of rock dielectric constant and conductivity. A dielectric dispersion model is used to invert the measurements and estimate the saturation exponent. The resulting saturation exponent is used to quantify wettability, e.g., by calculating a wettability index.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: March 22, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: Nikita Seleznev, Tarek M. Habashy
  • Patent number: 9103198
    Abstract: A system, method and device may be used to monitor conditions in a borehole. Well tubing and casing act as a conductive pair for delivering power to one or more downhole active sensors. At the surface, power and signal are isolated so that the same conductive pair may act to transmit the sensor signals to the surface. In an embodiment, the sensor signals are RF signals and the surface electronics demodulate the RF signals from the sensor power.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: August 11, 2015
    Assignee: CHEVRON U.S.A. INC.
    Inventors: Manuel E. Gonzalez, Melvin Clark Thompson, Robert Louis Williford, David William Beck
  • Patent number: 9000768
    Abstract: A method of surveying the condition of an underground enclosure including the steps of: (a) positioning at least one transmitter/receiver unit (including an antenna) within an underground, substantially nonconductive enclosure, such that a substantial air gap exists between the antenna and the inner wall of the enclosure; (b) transmitting an ultra wideband (UWB) signal toward at least a portion of the inner wall; and (c) processing the return signal in order to identify the interface between the soil and a region of conductivity different from the soil.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: April 7, 2015
    Assignee: Louisiana Tech University Research Foundation; a division of Louisiana Tech University Foundation, Inc.
    Inventors: Erez Allouche, Arun Prakash Jaganathan, Neven Simicevic
  • Publication number: 20150081219
    Abstract: Devices and processes provide for geophysical oil, gas, or mineral prospecting and subsurface fluid monitoring, using a controlled source electromagnetic system that transmits a designed probe wave to create images of sub-surface structures and fluids either statically or while in motion.
    Type: Application
    Filed: September 19, 2014
    Publication date: March 19, 2015
    Inventors: Trevor Keith Charles Pugh, Robert Michael Payton, Timothy Morgan
  • Patent number: 8957810
    Abstract: Systems and method for near-field millimeter wave imaging are provided, in particular, near-field millimeter wave imaging systems and methods that enable sub-wavelength resolution imaging by scanning objects with sub-wavelength probe elements and capturing and measuring phase and intensity of reflected energy to generate images.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: February 17, 2015
    Assignee: International Business Machines Corporation
    Inventors: Aydin Babakhani, Duixian Liu, Scott K. Reynolds, Mihai A. Sanduleanu
  • Patent number: 8922214
    Abstract: The present disclosure describes various geophysical survey systems and methods for mapping an electric potential field. At least one illustrative embodiment includes an electromagnetic (EM) source and geophysical survey cables that each includes multiple electrodes spaced apart along each geophysical survey cable's length, and multiple data acquisition units that each obtains measurements indicative of an electric potential between two the electrodes. A modeling module is included and configured to calculate a reference potential at a selected electrode for each of the plurality of geophysical survey cables, as well as a calculation module to combine signals representative of the measurements to produce signals indicative of the electric potential of each electrode relative to the reference potential.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: December 30, 2014
    Assignee: PGS Geophysical AS
    Inventors: Mattias Südow, Frederick James Barr, Jr., Peter Lindqvist, Robert Juhasz
  • Patent number: 8917094
    Abstract: Downhole tools and techniques acquire information regarding nearby conductors such as pipes, well casing, and conductive formations. At least some method embodiments provide a current flow along a drill string in a borehole. The current flow disperses into the surrounding formation and causes a secondary current flow in the nearby conductor. The magnetic field from the secondary current flow can be detected using one or more azimuthally-sensitive antennas. Direction and distance estimates may be obtainable from the azimuthally-sensitive measurements, and can be used as the basis for steering the drillstring relative to the distant conductor. Possible techniques for providing current flow in the drillstring include imposing a voltage across an insulated gap or using a toroid around the drillstring to induce the current flow.
    Type: Grant
    Filed: May 12, 2011
    Date of Patent: December 23, 2014
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael S. Bittar, Jing Li
  • Publication number: 20140368199
    Abstract: A drill string can include at least one transmit antenna and at least one receive antenna. The transmit antenna transmits at least one electromagnetic signal into a region of an earth formation. The receive antenna receives the signal from the region of the earth formation. The transmit antenna comprises one of a magnetic dipole and an electric dipole, and the receive antenna comprises the other of the magnetic dipole and the electric dipole. At least one characteristic of the region of the earth formation is determined, based at least partially on the signal received by the receive antenna. A homogeneous part of the electromagnetic signal may be reduced, to thereby increase a depth of detection of the characteristic.
    Type: Application
    Filed: August 28, 2014
    Publication date: December 18, 2014
    Inventors: Michael S. BITTAR, Burkay DONDERICI
  • Patent number: 8901931
    Abstract: A method for water monitoring about a deviated well is disclosed. The method includes positioning a series of electromagnetic (EM) receivers in a completed deviated wellbore, said receivers being spaced along substantially the length of the well located in a region of a reservoir to be monitored. The method also includes positioning an electromagnetic (EM) source at a first Earth surface location. Then the EM source is activated for a first survey measurement of the reservoir, and an EM field detected at each EM receiver is recorded. The EM source is moved to a second Earth surface location, and activated for a second survey measurement of the reservoir, and an EM field detected at each EM receiver is recorded. From the first and second survey measurements at each of the receivers, an inversion is performed to determine position of water about (and specifically below) the horizontal well.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: Cengiz Esmersoy
  • Publication number: 20140239958
    Abstract: Disclosed are methods and apparatus for adaptive source electromagnetic (EM) surveying. In accordance with one embodiment, a source waveform signal is generated, and an outgoing EM signal which is based on the source waveform signal is transmitted using an antenna. A responsive electromagnetic signal is detected using at least one electromagnetic sensor, and a receiver waveform signal based on the responsive electromagnetic signal is obtained. A feedback control signal which depends on at least one input signal is determined. Based on the feedback control signal, the source waveform signal is adapted. Other embodiments, aspects, and features are also disclosed.
    Type: Application
    Filed: May 6, 2014
    Publication date: August 28, 2014
    Applicant: PGS GEOPHYSICAL AS
    Inventors: Dougal KENNEDY, Gustav Goran Mattias SUDOW, Robert JUHASZ
  • Patent number: 8816689
    Abstract: A method and apparatus is provided for collecting reservoir data. The method includes providing one or more electromagnetic sources for generating an electromagnetic field in a reservoir and providing one or more electromagnetic sensors equipped with capacitive electrodes. The electromagnetic source is located separately from the electromagnetic sensor. The electromagnetic sensor may either be located within a well or at the surface, is capable of measuring the electromagnetic field in three dimensions, and may be isolated from the well fluids. The data collected by the electromagnetic sensors can be used to create a model of the oil reservoir, including the water saturation.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: August 26, 2014
    Assignee: Saudi Arabian Oil Company
    Inventors: Daniele Colombo, Timothy H. Keho, Michael Anthony Jervis, Brett W. Bouldin
  • Patent number: 8810391
    Abstract: A method of sensing exposure to one or more of a plurality of environmental factors includes exposing a code circuit to at least some of the environmental factors, the code circuit disposed over a substrate and including a plurality of electrically-connected sensor patches, each sensor patch susceptible to one of the environmental factors, wherein the code circuit has an electrical state. An electrical excitation signal is passed through the code circuit, and a corresponding received electrical signal detected, using a transceiver formed on a transceiver substrate separate from and disposed over the substrate, wherein the transceiver includes a controller and the received electrical signal depends on the excitation signal and the electrical state of the code circuit. Using the controller, the received electrical signal or a representation thereof is automatically stored in a memory. The checking and storing steps are automatically repeated after one or more selected time intervals.
    Type: Grant
    Filed: August 31, 2012
    Date of Patent: August 19, 2014
    Assignee: Eastman Kodak Company
    Inventors: Ronald Steven Cok, Christopher J. White
  • Patent number: 8797036
    Abstract: Disclosed are methods and apparatus for adaptive source electromagnetic (EM) surveying. In accordance with one embodiment, a source waveform signal is generated, and an outgoing EM signal which is based on the source waveform signal is transmitted using an antenna. A responsive electromagnetic signal is detected using at least one electromagnetic sensor, and a receiver waveform signal based on the responsive electromagnetic signal is obtained. A feedback control signal which depends on at least one input signal is determined. Based on the feedback control signal, the source waveform signal is adapted. Other embodiments, aspects, and features are also disclosed.
    Type: Grant
    Filed: February 29, 2012
    Date of Patent: August 5, 2014
    Assignee: PGS Geophysical
    Inventors: Dougal Kennedy, Mattias Sudow, Robert Juhasz
  • Patent number: 8754650
    Abstract: The present disclosure relates to a method to determine a characteristic of a subsurface formation using electromagnetic coupling components. A downhole logging tool having one or more transmitters and one or more receivers, and being capable of measuring the electromagnetic coupling components is provided. The electromagnetic coupling components are measured using the downhole logging tool and used to form a 3-D Lateral Indicator and/or a 3-D Longitudinal Indicator. The 3-D Lateral Indicator and/or the 3-D Longitudinal Indicator are used to determine the characteristic of the subsurface formation.
    Type: Grant
    Filed: March 5, 2010
    Date of Patent: June 17, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Emmanuel Legendre, Fabienne Legendre
  • Patent number: 8749241
    Abstract: A method of geophysical prospecting for detecting bodies of fluids in underground formations comprises the steps of activating a seismic energy source (2) to transmit seismic energy into the ground, detecting an electromagnetic signal (14) generated by interaction between the seismic energy and underground formations (12) including fluids, and recording properties of the detected electromagnetic signal against time, so as to record an electromagnetic signal generated by interaction between a secondary energy impulse (10) from the activation of the energy source and underground formations including fluids. The secondary energy impulse propagates to the formations more slowly than the primary seismic waves from the same activation of the energy source travelling at the speed of sound as attenuated by the materials through which they pass. The detected electromagnetic signal comprises frequencies in the range 0 to 30 Hz.
    Type: Grant
    Filed: October 20, 2011
    Date of Patent: June 10, 2014
    Assignee: EMON (UK) Limited
    Inventors: Christopher Edwards, Michael Nosworthy
  • Patent number: 8736269
    Abstract: The present disclosure describes various geophysical survey systems and methods for mapping an electric potential field. At least one illustrative embodiment includes an electromagnetic (EM) source and geophysical survey cables that each includes multiple electrodes spaced apart along each geophysical survey cable's length, and multiple data acquisition units that each obtains measurements indicative of an electric potential between two the electrodes. A calculation module is included and configured to combine signals representative of the measurements to produce signals indicative of the electric potential of each electrode relative to a reference potential assumed to be present at a selected electrode for each of the plurality of geophysical survey cables. Each reference potential is assumed to be of a magnitude that is within a tolerance range of a common reference potential.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: May 27, 2014
    Assignee: PGS Geophysical AS
    Inventors: Mattias Südow, Frederick James Barr, Jr., Peter Lindqvist, Robert Juhasz
  • Patent number: 8729903
    Abstract: Method for assessing hydrocarbon source rock potential of a subsurface region without well log information. The method uses surface electromagnetic (121) and seismic (122) survey data to obtain vertical profiles of resistivity and velocity (123), which are then analyzed in the same way as well log data are analyzed by the well known Delta Log R method (124).
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: May 20, 2014
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Leonard J. Srnka, Quinn R. Passey, Kevin M. Bohacs, David R. Converse, Yaping Zhu
  • Patent number: 8638103
    Abstract: The present disclosure relates to determining a property, such as resistivity, of an earth formation. A transmitter is disposed in a wellbore penetrating the formation, and a plurality of receivers are distributed on or near the earth's surface. The transmitter sends electromagnetic energy into the formation and the resulting signal, after passing through the formation, is detected by the array of receivers. The received signal is used to determine the property of the formation. This is often achieved using an inversion or numerical model of the formation being measured. The inversion takes into account changes in the background formation model due to transmitting from various locations. The measurements made on the formation can be performed while drilling the wellbore or subsequent to the drilling.
    Type: Grant
    Filed: October 21, 2009
    Date of Patent: January 28, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Richard Rosthal, Edward Nichols, John Lovell, Christopher Bogath
  • Patent number: 8614577
    Abstract: A method of determining anisotropy in a borehole is disclosed. An array of measurements along the borehole is obtained and a first depth in the borehole is selected. An arbitrary plane oriented with respect to the borehole at the first depth is designated and an anisotropy for the first depth with respect to the arbitrary plane is determined. The arbitrary plane is repositioned at the first depth and an anisotropy for different positions of the arbitrary plane at the first depth is determined. A minimum anisotropy coefficient with respect to the arbitrary plane at the first depth is identified based on anisotropy for different positions of the arbitrary plane. An anisotropy tensor for the first depth is then identified.
    Type: Grant
    Filed: May 18, 2011
    Date of Patent: December 24, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mark A. Proett, Tegwyn J. Perkins, Ronald Stamm
  • Publication number: 20130221969
    Abstract: Disclosed are methods and apparatus for adaptive source electromagnetic (EM) surveying. In accordance with one embodiment, a source waveform signal is generated, and an outgoing EM signal which is based on the source waveform signal is transmitted using an antenna. A responsive electromagnetic signal is detected using at least one electromagnetic sensor, and a receiver waveform signal based on the responsive electromagnetic signal is obtained. A feedback control signal which depends on at least one input signal is determined. Based on the feedback control signal, the source waveform signal is adapted. Other embodiments, aspects, and features are also disclosed.
    Type: Application
    Filed: February 29, 2012
    Publication date: August 29, 2013
    Inventors: Dougal KENNEDY, Mattias Südow, Robert JUHASZ
  • Patent number: 8513941
    Abstract: A power detection regulation device including a power detection signal generator, a power state detector and a regulated output unit is disclosed. The power detection signal generator receives the input power from an external power supply and generates a power detection signal. The power state detector generates a power state signal based on the power state derived from the power detection signal. The regulated output unit receives the power state signal and generates a driving signal to an external electrical device in accordance with the feedback signal from the external electrical device. The power state signal is provided for the external electrical element to perform relevant processes, and the regulated output device can output the predetermined driving signal on receiving the power state signal indicating some abnormal situation in the input power so as to maintain the normal operation performed by the actuating element in the external electrical device.
    Type: Grant
    Filed: July 30, 2011
    Date of Patent: August 20, 2013
    Assignee: Inno-Tech Co., Ltd.
    Inventors: Ting-Chin Tsen, Shu-Chia Lin, Wen-Yueh Hsieh
  • Publication number: 20130141101
    Abstract: The invention relates to instruments designated for geophysical survey, in particular for soil mass exploration using electromagnetic waves. Radio frequency assisted geostructure analyzer comprising transmitting antenna and radio transmitter (2) installed on the first pillar (3), with transmitting antenna consisting of transmitting loop (1) and antenna rod (10), and also receiving loop (4) and radio receiver (7) installed on the second pillar (9), and receiving ferrite antenna (5).
    Type: Application
    Filed: December 13, 2010
    Publication date: June 6, 2013
    Inventor: Anatolii Kudelia
  • Patent number: 8427165
    Abstract: A method for removing the effects of an airwave from marine electromagnetic data comprising providing an electromagnetic source and at least one receiver in the water; measuring the electromagnetic response at a first source-receiver separation; determining a scaled version of the airwave response at a source-receiver separation where the earth response is negligible and using the scaled airwave response to determine the earth response measured at the first separation. Using this method, an improved estimate of the earth's response can be achieved.
    Type: Grant
    Filed: February 11, 2008
    Date of Patent: April 23, 2013
    Assignee: PGS EM Limited
    Inventor: Antoni Marjan Ziolkowski
  • Patent number: 8427163
    Abstract: A spot indicating metal detector apparatus rides on a motorized platform having a rotary framework having a plurality of metal detectors mounted thereon with a plurality of metal detector coils positioned adjacent the ground below. The metal detector apparatus has a plurality of spray heads each associated with one metal detector detector coil for spraying a fluid onto the earth at the position the metal detector detects the presence of a metallic object.
    Type: Grant
    Filed: April 2, 2010
    Date of Patent: April 23, 2013
    Inventor: Robert L. Sickler, Jr.
  • Patent number: 8384389
    Abstract: A method of monitoring a behavior of carbon dioxide in a stratum by using a marine Controlled-Sources Electromagnetic survey, includes: (S10) collecting a sample of sandstone at a stratum for charging carbon dioxide; (S20) calculating an effective porosity of the collected sample; (S30) measuring an electrical resistivity by saturating the collected rock sample with a pore fluid having a different concentration; (S40) forecasting a change of an electrical resistivity of stratum by charging carbon dioxide; (S50) carrying out a Marine CSEM exploration before and after charging the carbon dioxide separately in each step; and (S60) monitoring a charging behavior of carbon dioxide in stratum by a Marine CSEM exploration.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: February 26, 2013
    Assignee: Korea Institute of Geoscience and Mineral Resources (KIGAM)
    Inventors: Sam Gyu Park, Yutaka Sasaki, Sung Joon Cho
  • Patent number: 8378684
    Abstract: A method for determining a formation type within a wellbore includes forming the wellbore such that the wellbore intersects fractures within a formation. Hydrocarbons are produced from the formation. An induction tool is disposed into the wellbore after producing the hydrocarbons. A resistivity of a portion of the formation is measured with the induction tool. The resistivity of the portion of the formation is compared with a known formation type. The formation type of the portion of the formation is determined based on the resistivity. A characteristic of the formation type is output.
    Type: Grant
    Filed: April 14, 2009
    Date of Patent: February 19, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Chanh Cao Minh, Michel Claverie
  • Patent number: 8350570
    Abstract: A method of surveying the condition of an underground enclosure including the steps of (a) positioning at least one transmitter/receiver unit (including an antenna) within an underground, substantially nonconductive enclosure, such that a substantial air gap exists between the antenna and the inner wall of the enclosure; (b) transmitting an ultra wideband (UWB) signal toward at least a portion of the inner wall; and (c) processing the return signal in order to identify the interface between the soil and a region of conductivity different from the soil.
    Type: Grant
    Filed: August 29, 2008
    Date of Patent: January 8, 2013
    Assignee: Louisiana Tech Research Foundation; a division of Lousiana Tech University Foundation, Inc.
    Inventors: Erez Allouche, Arun Prakash Jaganathan, Neven Simicevic
  • Patent number: 8310238
    Abstract: A system for monitoring movement in a subsurface environment, which may be used to determine flow dynamics within a fluid mass such as an ore body, or track subsurface persons or moving assets. A plurality of underground positioning system (UPS) elements in the subsurface environment transmit characteristic signals to a plurality of antennas, which transmit the signals to a data processing apparatus. The system thus determines changes in the positions of the UPS elements to derive an indication of the motion of the fluid mass or the locations and movement of subsurface persons or assets.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: November 13, 2012
    Assignee: Penguin Automated Systems, Inc.
    Inventor: Greg Baiden
  • Publication number: 20120283952
    Abstract: Methods and apparatus for detecting nearby conductors such as pipes, well casing, etc., from within a borehole. A nearby casing string can be detected by transmitting an electromagnetic signal from a transmit antenna on a downhole logging tool and measuring a parallel response signal with a first receive antenna parallel to the transmit antenna and a perpendicular response signal with a second receive antenna perpendicular to the transmit antenna, both receive antennas on the downhole logging tool. As the tool rotates, the transmitting and measuring are repeated to determine the azimuthal dependence of the parallel and perpendicular response signals. The azimuthal dependence is analyzed to determine a diagonal component of said azimuthal dependence for each response signal. Distance to a casing string can be estimated using the diagonal component of each response signal. At least one of the antennas is preferably tilted.
    Type: Application
    Filed: July 16, 2012
    Publication date: November 8, 2012
    Applicant: Halliburton Energy Services, Inc.
    Inventors: Yumei TANG, Michael S. BITTAR, Shanjun LI
  • Patent number: 8305081
    Abstract: A transient electromagnetic (TEM) signal is recorded in an earth formation during vibration of a logging tool. Concurrently, accelerometer measurements are made. The accelerometer measurements are used to correct the TEM signal for the vibration using the accelerometer measurement and a transfer function relating the TEM signal and the accelerometer. The transfer function may be determined using measurements in a water tank or by using the tail end of the TEM measurements.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: November 6, 2012
    Assignee: Baker Hughes Incorporated
    Inventors: Arcady Reiderman, Vladimir Dubinsky, Zarema Dubinsky, legal representative
  • Patent number: 8299936
    Abstract: A method for generating electromagnetic waves in the ELF/ULF comprising the steps of using a ground-based Horizontal Electric Dipole (HED) antenna to send electromagnetic pulses upwardly in the E-region of the ionosphere to form an oscillatory or pulsed electric field; allowing said pulsed electric field to interact with magnetized plasma of the lower ionosphere to generate a pulsed horizontal and vertical current which have associated Horizontal and Vertical Electric Dipole moment; and allowing them to radiate.
    Type: Grant
    Filed: December 15, 2009
    Date of Patent: October 30, 2012
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Konstantinos Papadopoulos
  • Patent number: 8299794
    Abstract: A method for electromagnetic geophysical surveying of rock formations (1) under a sea-floor (3) comprising the following steps: *—towing first and second alternating field (E1, E2) emitting sources (s1, S2) in first and second depths below the sea surface, said first field (E1) having a first phase (?1);—said second alternating field (E2) given a second phase (?2) different from said first phase (?1), said sources (S1, S2) constituting a phased array emitter antenna with directivity for transmitting a major proportion of the combined electromagnetic energy downwards;—said first and second fields (E1, E2) for propagating partly down through the sea-floor (3) and being reflected and/or refracted through said rock formations (1) and partly propagating back through the seafloor (3);—said first and said second fields (E1, E2) for merging to a total field and being measured by electromagnetic receivers (r1, r2, . . . , rn) recording corresponding field registrations (Er1(t), Er2(t), Er3(t), . . . , Ern(t)).
    Type: Grant
    Filed: May 16, 2007
    Date of Patent: October 30, 2012
    Assignee: Norsk Hydro ASA
    Inventors: Brian Anthony Farrelly, Svein Erling Johnstad