With Separate Pickup Patents (Class 324/334)
  • Patent number: 10416334
    Abstract: There is disclosed a method of performing a controlled source electromagnetic survey, which includes in one embodiment deploying a receiver and an electric dipole source. The source defines a dipole axis. An electromagnetic field is transmitted from the electric dipole source. First and second horizontal components of an electromagnetic field response are detected using the receiver. A vertical component of the electromagnetic field response is then estimated using the detected first and second horizontal components of the electromagnetic field response.
    Type: Grant
    Filed: January 20, 2010
    Date of Patent: September 17, 2019
    Assignee: EQUINOR ENERGY AS
    Inventors: Lars Ole Løseth, Lasse Amundsen, Arne Johannes Kaaijk Jenssen
  • Patent number: 10338173
    Abstract: The present invention is directed to a system and method for reducing large magnetic artifact susceptibility in magnetic resonance imaging. The present invention is used to maximize cancellation of the magnetic field distortion cremated when objects with high variations in magnetic susceptibility are placed in a uniform magnetic field. Particularly, the present invention reduces the magnetic resonance imaging artifact produced by pacemakers and internal cardiac defibrillators in order to maximize the diagnostic image quality in the region surrounding these devices.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: July 2, 2019
    Assignee: The Johns Hopkins University
    Inventors: Aravindan Kolandaivelu, Henry Halperin
  • Patent number: 10321843
    Abstract: A portable sensing system device and method for providing microwave or RF (radio-frequency) sensing functionality for a portable device, the device comprising: a portable device housing configured to be carried by a user; and a sensing unit within said housing con-figured to characterize an object located in proximity to the portable system, said sensing unit comprising: a wideband electromagnetic transducer array said array comprising a plurality of electromagnetic transducers; a transmitter unit for applying RF signals to said electromagnetic transducer array; and a receiver unit for receiving coupled RF signals from said electromagnetic transducers array.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: June 18, 2019
    Assignee: VAYYAR IMAGING LTD
    Inventor: Raviv Melamed
  • Patent number: 10208584
    Abstract: A wellbore ranging system and method utilized between first and second wellbores includes an electromagnetic field sensing instrument disposed in the second wellbore, a conductive casing in the first wellbore, an electric current source exciting current flow in the conductive member, and a fiber optic sensor disposed adjacent the conductive member. The current flow along the conductive member results in a magnetic field which is measured by the sensing instrument. The fiber optic sensor includes a core that is responsive to the magnetic field in which it is disposed. The responsive core alters the optical property of an optical wave guide forming the sensor, which altered optical property can be utilized to measure the magnitude of the electrical current at the position of the sensor. The magnitude of the current and the measured magnetic field can be utilized to determine a range between the first and second wellbores.
    Type: Grant
    Filed: December 18, 2013
    Date of Patent: February 19, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Glenn A. Wilson, Burkay Donderici
  • Patent number: 10024997
    Abstract: The Larmor frequency for an in situ nuclear magnetic resonance (NMR) tool is determined and used to acquire NMR data. An NMR tool is provided and placed in situ, for example, in a wellbore. An initial estimate of the Larmor frequency for the in situ NMR tool is made and NMR data are acquired using the in situ NMR tool. A spectral analysis is performed on the NMR data, or optionally, the NMR data are digitized and a discrete Fourier transform (DFT) is performed on the digitized NMR data. The modal frequency of the spectral analysis or DFT is determined, and the Larmor frequency for the in situ NMR tool is determined using the modal frequency. The NMR tool is modified to transmit at the determined Larmor frequency and then used to acquire further NMR data.
    Type: Grant
    Filed: February 5, 2014
    Date of Patent: July 17, 2018
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Vivek Anand, Robert Freedman, Anatoly Dementyev, Payam Tabrizi, Daniel Catina
  • Patent number: 10012754
    Abstract: In some aspects, systems and methods are provided for determining formation properties using data from both a high-frequency dielectric tool (HFDT) and an array induction tool (AIT). The system includes a controller in communication with at least one HFDT, at least one ART (which may be a multi-component AIT), and a processing unit. The acquired ART formation data can be processed and used to set constraints on the processing of the acquired HFDT formation data. In aspects, a set of processed HFDT data can be used to reinitialize the ART data processing, to allow for a repeated or iterative evaluation process. The system and method generate values used to determine one or more formation properties such as a resistivity of the formation, the presence of an invasion in the formation, mud resistivity or permittivity, anisotropy characteristics of the formation, and dipping characteristics of the formation.
    Type: Grant
    Filed: March 19, 2014
    Date of Patent: July 3, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Dagang Wu, Junsheng Hou
  • Patent number: 9851438
    Abstract: A system and associated methodology identifies and estimates relaxation frequencies, which are used by a Ground Penetrating Radar (GPR). These estimated relaxation frequencies are used to characterize and interpret a reflected GPR signal from a ground. The system also identifies the number of relaxation frequencies and estimates their magnitudes and values. The system also exhibits high resistance to noise.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: December 26, 2017
    Assignee: King Fahd University of Petroleum and Minerals
    Inventors: Ahmad A. Masoud, Ali A Al-Shaikhi
  • Patent number: 9709691
    Abstract: The present invention provides a transmitter for an electromagnetic survey system for transmitting signals having a waveform comprising at least a first pulse and a second pulse, wherein the first and second pulses are different in at least one of shape and power. Embodiments of the invention enable combining various distinct pulses that may have been optimized for respective applications to form a transmitter waveform for conducting a geological survey. In effect, the embodiments of the present invention provides an EM system that is substantially equivalent to multiple EM systems operating at the same time for collecting data in relation to different aspects of the geology of interest. Advantageously, the benefits of the present invention can be obtained without the undesirable complexity and cost associated with the simultaneous deployment of multiple EM systems.
    Type: Grant
    Filed: October 15, 2013
    Date of Patent: July 18, 2017
    Assignee: CGG DATA SERVICES AG
    Inventors: Philip John Miles, Jason Conrad Berringer, Tianyou Chen, David Gregory Hodges
  • Patent number: 9606256
    Abstract: Determining parameters associated with a hydrocarbon bearing formation beneath a sea bed. At least some of the illustrative embodiments are methods including: obtaining data gathered regarding a plurality of distinct readings by sensors, the readings responsive to a source of electrical energy towed in water above the hydrocarbon bearing formation, the sensors sense an electrical parameter associated with the source; combining a first datum associated with a first path of travel of the source with a second datum associated with a second path of travel of the source, the second path of travel distinct from the first path of travel, and the combining creates a first combined datum; and determining the parameter associated with the hydrocarbon bearing formation by evaluating the first combined datum.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: March 28, 2017
    Assignee: PGS Geophysical AS
    Inventors: U. Peter Lindqvist, L. Erik Magnus Bjornemo
  • Patent number: 9588247
    Abstract: A system for detecting a location of a subsurface channel may include a portable frame and a plurality of magnetic coils supported by the frame. The magnetic coils may be spaced apart from one another and ends of each of the magnetic coil are unobstructed by other of the magnetic coils.
    Type: Grant
    Filed: February 27, 2013
    Date of Patent: March 7, 2017
    Assignee: Willowstick Technologies, LLC
    Inventors: Val O. Kofoed, Jerry R. Montgomery, Rondo N. Jeffery, N. Rich Montgomery, Michael L. Jessop, Michael J. Wallace, Benjamin A. Christensen
  • Patent number: 9540085
    Abstract: An ocean exploration apparatus including: a probe body; a buoyancy adjusting section that adjusts buoyancy generated in the probe body; a posture adjusting section that adjusts a posture of the probe body; a position information acquiring section that acquires position information of the probe body; a wing section that moves the probe body using a lifting force applied from seawater; a sensor section that is provided in the probe body and measures an electromagnetic field; and a control section that controls operations of the buoyancy adjusting section, the posture adjusting section, the position information acquiring section, and the sensor section according to predetermined conditions.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: January 10, 2017
    Assignee: YBM CO., LTD.
    Inventors: Hideki Mizunaga, Satoru Yamaguchi
  • Patent number: 9405031
    Abstract: A method for mapping geological structures of a formation on a side of a surface, includes: generating a magnetic moment using at least one magnetic moment generator to build up a magnetic field in the formation in an on-period, wherein the magnetic moment has a moment strength, and wherein the magnetic moment is positioned on another side of the surface; changing the magnetic moment to change the magnetic field; and making at least one record in a recording device at a recording time trecord in an off-period, wherein the record includes at least a representation of the change in the magnetic field and/or a representation of the magnetic field obtained by a B/E-measuring unit; wherein the on-period is separated from the off-period by the act of changing the magnetic moment.
    Type: Grant
    Filed: May 14, 2012
    Date of Patent: August 2, 2016
    Assignee: SkyTEM Surveys Aps
    Inventor: Kurt Ingvard Sorensen
  • Patent number: 9359888
    Abstract: Techniques involve determining the conductivity profile of a formation from a well between a surface location and a borehole location. The method involves placing a first sensor at the surface location, a second sensor located at the borehole location, obtaining a first signal by detecting Schumann resonances from the electric field occurring at the first location, obtaining a second signal by detecting Schumann resonances from the electric field occurring at the second location with the second sensor; and combining the first and the second signal to determine the conductivity profile of the formation between the first location and the second location.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: June 7, 2016
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Erwann Lemenager, Martin G. Luling, Yves G. Mathieu, Christian Chouzenoux
  • Patent number: 9335435
    Abstract: A technique provides a methodology for improving surveys of subterranean regions. The methodology comprises estimating macro anisotropy and an intrinsic or micro anisotropy of an overburden. A surface electromagnetic survey is conducted, and the data from the survey is inverted based on or including information gained from estimating the macro anisotropy and/or intrinsic anisotropy. A processor system can be used to conduct the inversion with the adjustments for anisotropy to improve the information provided by the survey.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: May 10, 2016
    Assignee: Schlumberger Technology Corporation
    Inventors: James P. Brady, Andrew Hawthorn, John P. Horkowitz, Jean Seydoux, Jacques R. Tabanou, Jian Yang, David L. Alumbaugh
  • Patent number: 9239401
    Abstract: Disclosed are methods and systems for using electromagnetic sources that are substantially stationary in a body of water while electromagnetic field signals are detected with electromagnetic sensors towed through the body of water. An embodiment discloses an apparatus comprising: a vessel; a first electromagnetic source coupled to the vessel and configured to have a dipole moment oriented in a first direction; and a second electromagnetic source coupled to the vessel and configured to have a dipole moment oriented in a second direction, wherein the second direction is generally orthogonal to the first direction. Another embodiment discloses a system comprising: a sensor streamer configured for towing in a body of water, wherein the sensor streamer comprises a plurality of electromagnetic sensors disposed at spaced apart positions; and an electromagnetic source assembly configured for deployment at a substantially stationary position in the body of water.
    Type: Grant
    Filed: March 1, 2012
    Date of Patent: January 19, 2016
    Assignee: PGS Geophysical AS
    Inventors: Carl Joel Gustav Skogman, Johnathan P. Linfoot
  • Patent number: 9229102
    Abstract: Systems and methods for sensing targets on an opposite side of a wall are disclosed. In some aspects, the techniques include providing an indication to a user that portions of reflected radar signals were blocked by radiofrequency-blocking material at the wall. In some aspects, the techniques include identifying candidate targets as multipath echoes or motion-induced errors based on a correlation map.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: January 5, 2016
    Assignee: L-3 Communications Security and Detection Systems, Inc.
    Inventors: Donald Charles Wright, Christopher Gary Sentelle, Jeffery Carter May, Rafik Hanna, Liviu Voicu
  • Patent number: 9110180
    Abstract: A method for acquisition and processing of marine seismic signals to extract up-going and down- going wave-fields from a seismic energy source includes deploying at least two marine seismic energy sources at different depths in a body of water. These seismic energy sources are actuated with known time delays that are varied from shot record to shot record. Seismic signals from sources deployed at different depths are recorded simultaneously, Seismic energy corresponding to each of the sources is extracted from the recorded seismic signals. Up-going and down-going wave-fields are extracted from the sources deployed at different depths using the extracted seismic energy therefrom. A method includes the separated up-going and down-going wave-fields are propagated to a water surface or a common reference, the up-going or the down-going wave-field is 180 degree phase shifted, and the signals from these modified up-going and down-going wave-fields are summed.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: August 18, 2015
    Assignee: PGS Geophysical AS
    Inventors: Stian Hegna, Gregory Ernest Parkes
  • Patent number: 9035656
    Abstract: A device rotates at least one static magnetic field about an axis, producing a rotating magnetic dipole field, and is movable in relation to the surface of the ground. The field is periodically sensed using a receiver to produce a receiver output responsive to the field. A positional relationship between the receiver and the device is monitored using the output. In one aspect, changing the positional relationship, by moving the device nearer to a boring tool which supports the receiver, causes an increase in accuracy of depth determination. In another aspect, determination of an actual overhead position of the boring tool, and its application, are described. Use of a plurality of measurements over at least one-half revolution of each magnet is disclosed. Establishing a surface radial direction toward a boring tool and resolution of multi-valued parameters is described. Calibration techniques, as well as a three transmitter configuration are also described.
    Type: Grant
    Filed: February 12, 2014
    Date of Patent: May 19, 2015
    Assignee: Merlin Technology Inc.
    Inventors: Rudolf Zeller, Guenter W. Brune, Albert W. Chau, John E. Mercer
  • 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
  • Patent number: 8994527
    Abstract: A device for collecting samples of the sea floor, including a collection apparatus, a diving apparatus and a control apparatus.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: March 31, 2015
    Inventor: Galen G. Verhulst
  • Publication number: 20150048833
    Abstract: Methods and systems for measuring subsurface electrical conductivity, using first and second sensor coils. The second sensor coil has a smaller effective area and a greater bandwidth than the first sensor coil. The first and second sensor coils are positioned with respect to each other to achieve zero or near zero mutual inductance.
    Type: Application
    Filed: January 24, 2014
    Publication date: February 19, 2015
    Applicant: Geonics Limited
    Inventor: Miroslav Bosnar
  • Patent number: 8933699
    Abstract: A resistivity array having a modular design includes a transmitter module with at least one antenna, wherein the transmitter module has connectors on both ends adapted to connect with other downhole tools; and a receiver module with at least one antenna, wherein the transmitter module has connectors on both ends adapted to connect with other downhole tools; and wherein the transmitter module and the receiver module are spaced apart on a drill string and separated by at least one downhole tool. Each transmitter and receiver module may comprise at least one antenna coil with a magnetic moment orientation not limited to the tool longitudinal direction. A spacing between the transmitter and receiver module may be selected based on expected reservoir thickness.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: January 13, 2015
    Assignee: Schlumberger Technology Corporation
    Inventors: Jean Seydoux, Emmanuel Legendre, Reza Taherian
  • Patent number: 8928324
    Abstract: Methods for geophysical surveying include disposing an electromagnetic source and first and second receiver electrodes in water; actuating the source; and detecting a responsive electromagnetic field by measuring a potential difference between the first and second receiver electrodes, wherein: the electromagnetic source defines a source dipole axis; the first and second receiver electrodes define a receiver dipole axis; and the source dipole axis is not substantially parallel to the receiver dipole axis. Systems for geophysical surveying include a first source electrode on a first source cable; a second source electrode on a different second source cable, the first and second source electrodes forming an electromagnetic source and defining a source dipole axis; a first receiver electrode on a first receiver cable; a second receiver electrode on a different second receiver cable, the first and second receiver electrodes defining a receiver dipole axis not substantially parallel to the source dipole axis.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: January 6, 2015
    Assignee: PGS Geophysical AS
    Inventor: Bruce Alan Hobbs
  • 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: 8917102
    Abstract: A method for measuring a capacitance using a capacitance meter. The capacitance meter includes an AC power source with a controllable frequency which is fed to a capacitor to measure its capacitance. A first measurement of the capacitance is performed by the capacitance meter using a first frequency. When the first measurement of the capacitance indicates the capacitance is below a threshold capacitance a lower capacitance measurement is performed in the capacitance meter, using a second measurement of the capacitance using a second frequency. When the first measurement of the capacitance indicates the capacitance is above a threshold capacitance, a higher capacitance measurement is performed in the capacitance meter, using a second measurement of the capacitance using a third frequency, the third frequency being lower than the second frequency.
    Type: Grant
    Filed: September 17, 2010
    Date of Patent: December 23, 2014
    Assignee: ABB Technology AG
    Inventors: Alf Brodin, Jon Lissmats, Jerry Svedlund, Hans Olof Fröjd
  • 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
  • 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
  • Patent number: 8896313
    Abstract: Disclosed is an electromagnetic receiver assembly for marine electromagnetic surveying, the electromagnetic receiver assembly comprising an elongated housing and receiver electrodes mounted at separate points along the elongated housing. An embodiment may include an electromagnetic receive assembly that includes an elongated housing, wherein the elongated housing defines an interior chamber. The electromagnetic receiver assembly may further include receiver electrodes configured to be in contact with water when in operation, wherein the receiver electrodes are mounted at separate points along the elongated housing. The electromagnetic receiver assembly may further include sensor electronics disposed in the interior chamber and electrically coupled to the receiver electrodes. The electromagnetic receiver assembly may be configured for deployment on or near a bottom of a body of water.
    Type: Grant
    Filed: March 15, 2012
    Date of Patent: November 25, 2014
    Assignee: PGS Geophyiscal AS
    Inventors: Ulf Peter Lindqvist, Gustav Goran Mattias Sudow, Andras Robert Juhasz, Rune Johan Magnus Mattsson, Carl Joel Gustav Skogman, Lars Erik Magnus Bjornemo
  • Patent number: 8896314
    Abstract: A method for marine electromagnetic surveying includes transmitting a first electromagnetic field oriented in a first direction into a body of water. A second electromagnetic field oriented in a second direction is transmitted into the body of water, wherein the second direction is substantially transverse to the first direction. A parameter related to electromagnetic field amplitude is detected at a plurality of longitudinally and laterally spaced apart positions behind a vessel. The components of the detected electromagnetic field parameter are resolved into components along the first and second directions by using the geometrical symmetries and asymmetries of the transmitting source. Systems for implementing such methods are also provided.
    Type: Grant
    Filed: May 5, 2010
    Date of Patent: November 25, 2014
    Assignee: PGS Geophysical AS
    Inventor: Gustav Göran Mattias Südow
  • Publication number: 20140312906
    Abstract: An apparatus for estimating a subsurface material property includes: a first energy interface device configured to transmit electromagnetic or electrical energy into the subsurface material; a second energy interface device configured to receive return electromagnetic or electrical energy due to the transmitted electromagnetic or electrical energy interacting with the subsurface material; and a processor configured to estimate the property using a signal received from the second device; wherein at least one of the first energy interface device and the second energy interface device is a fractal-shaped antenna comprising a base motif figure and at least one scaled down replication of the base motif figure, the at least one replication being a change from the base motif by at least one of a linear displacement translation and a rotation, and a position of the replication upon the base motif figure is by at least one of rotation, translation, and stretching.
    Type: Application
    Filed: April 23, 2013
    Publication date: October 23, 2014
    Applicant: BAKER HUGHES INCORPORATED
    Inventor: Randy Gold
  • Patent number: 8829899
    Abstract: A pneumatic vibration isolating suspension is disclosed for supporting a payload on a moving carrier while suppressing the transmission of vibrations in the 1 to 50 Hz band between the carrier and the payload. The disclosed invention can be deployed in the air in a towed carrier or sonde, and operated from aircraft power, making it a suitable platform for airborne geophysical instrumentation. It also has particular application to airborne electromagnetic surveying operating in the same frequency band because the sensor vibrations that result in noise created by the modulation of the sensor coupling with the earth's magnetic field are suppressed. Furthermore, the invention can be constructed from resistive composite materials and non-magnetic metals, so it can be operated without producing significant modification to the ambient electromagnetic field being measured.
    Type: Grant
    Filed: July 26, 2012
    Date of Patent: September 9, 2014
    Assignee: Vale S.A.
    Inventors: Benjamin David Polzer, Gordon Fox West, Peter White Walker
  • Publication number: 20140239956
    Abstract: A surface electromagnetic survey system and method for detecting a fracture or fracture zone in a rock formation are provided. The system includes an electromagnetic source configured to generate an electromagnetic field in the vicinity of or at a surface of the rock formation. The electromagnetic source includes one or more electric dipole sources that are arranged so as to generate a substantially vertical electric field. The system also includes an electromagnetic receiver associated with the electromagnetic source, the electromagnetic receiver being configured to measure a component of the electromagnetic field at the surface of the rock formation; and a processor configured to convert the measured component of the electromagnetic field measured at the electromagnetic receiver into an electromagnetic field response per unit moment of the electromagnetic source. The electromagnetic field response provides information about characteristics parameters of the fracture or fracture zone.
    Type: Application
    Filed: February 28, 2013
    Publication date: August 28, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventors: Gary Michael Hoversten, David Lee Alumbaugh
  • Publication number: 20140239957
    Abstract: A method for mapping a subterranean formation having an electrically conductive wellbore casing therein may include using a low frequency electromagnetic (EM) transmitter and EM receiver operating at a low frequency of less than or equal to 10 Hertz to perform a first EM survey of the subterranean formation, and with either the low frequency EM transmitter or EM receiver within the electrically conductive well-bore casing. The method may further include injecting a magnetic fluid into the subterranean formation, and using the low frequency EM transmitter and EM receiver to perform a second EM survey of the subterranean formation after injecting the magnetic fluid.
    Type: Application
    Filed: July 9, 2012
    Publication date: August 28, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Ping Zhang, David L. Alumbaugh, Michael Wilt
  • 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: 8791701
    Abstract: Electromagnetic proximity detection method for a buried structure executed with a mobile detection device, including sensing an electromagnetic field emitted from the structure as an analog electrical signal and digitalizing the analog electrical signal as a digital signal, performed after or while filtering the analog and/or digital signal. The proximity of the buried structure is determined by analyzing the digital signal, wherein the detection method can be alternatively executed in at least two of the following modes of detection: Power-Mode of detection, Radio-Mode of detection or Active-Mode of detection. An additional Switching-Mode of operation includes a repeated sequential detection in at least two of the mentioned modes of detection and is done by automatic subsequent alternating of the mode of detection with a minimum rate of alternation that an area of detection is coverable by the at least two modes of detection in a single execution of the detection method.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: July 29, 2014
    Assignee: Leica Geosystems AG
    Inventors: Simon Branson, Ping Wang
  • Publication number: 20140191760
    Abstract: The far zone “airwave” that arises when surveying subsea formations is greatly diminished by deployment of the transmitter combining mutually orthogonal horizontal electric and magnetic dipoles with the electric and magnetic dipole moments being locked in a special relationship. At each of the operating frequencies, the amplitude and phase characteristics of the transmitter electric and magnetic dipole moments are determined either from a supplementary measurement earned out using natural and/or controlled field sources, or by minimization of the vertical magnetic field at a remote receiver. Similar results can be obtained when data acquired in two independent surveys—one with the horizontal electric dipole transmitter pointing in one direction and another with a horizontal magnetic dipole transmitter pointing in the orthogonal direction and towed over the same or close positions—are linearly combined to minimize the vertical component of the combined magnetic field at remote receivers.
    Type: Application
    Filed: January 17, 2014
    Publication date: July 10, 2014
    Inventor: Bentsion Zinger
  • Publication number: 20140184227
    Abstract: Concurrently measuring, correlating, and processing magnetic and electric field data includes measuring base band signals, and then up-converting those band signals to a higher frequency for filtering, while at the same time preserving phase and amplitude information. All timed elements in the system are rigorously synchronized. The increased data set results in improved signal-to-noise ratio and information correlation.
    Type: Application
    Filed: March 5, 2014
    Publication date: July 3, 2014
    Applicant: Deep Imaging Technologies, Inc.
    Inventor: Alexander Edward Kalish
  • Patent number: 8754649
    Abstract: A disclosed electromagnetic survey system includes one or more streamer(s) having multiple electromagnetic sensors and motion sensing units. Each motion sensing unit has one or more accelerometer(s) to measure motion perpendicular to an axis of the streamer, and a rotation sensor to measure rotation about the axis. The measurements of the accelerometer are adjusted based on measurements from the rotation sensor. The survey system also includes one or more processor(s) that determine, for each electromagnetic sensor, a motion signal based on the adjusted measurements. A described electromagnetic survey method includes processing acceleration and rotational motion measurements to obtain an orientation of motion sensing units as a function of time. The measured acceleration is manipulated based on the orientation to obtain one or more velocity signal(s) for each motion sensing unit. Interpolation is performed on the velocity signals to determine at least one velocity signal for each electromagnetic sensor.
    Type: Grant
    Filed: May 12, 2010
    Date of Patent: June 17, 2014
    Assignee: PGS Geophysical AS
    Inventors: Gustav Göran Mattias Südow, Ulf Peter Lindqvist, Andras Robert Juhasz, Carl Joel Gustav Skogman
  • 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: 8692555
    Abstract: A vertical receiver antenna device includes first and second receiving, electrode units interconnected by a receiver antenna cable and connected to means for the electromagnetic surveying of electrically resistive targets potentially containing hydrocarbons. The receiver antenna is arranged in a tubular, non-magnetic antenna housing arranged vertically in subsea uncompacted material, and one of the first and second receiving electrode units being connected in a electrically conductive manner to the underlying structure, and the other one of the first and second receiving electrode units being arranged in a portion of the antenna housing distantly from the first one of first and second receiving electrode units.
    Type: Grant
    Filed: September 18, 2009
    Date of Patent: April 8, 2014
    Assignee: Advanced Hydrocarbon Mapping AS
    Inventor: Jostein Kåre Kjerstad
  • Patent number: 8686917
    Abstract: Location determination is performed using a transmitter including an elongated generally planar loop antenna defining an elongation axis. The elongation axis is positioned along at least a portion of a path. A magnetic field is then generated which approximates a dipole field. Certain characteristics of the magnetic field are then determined at a receiving position radially displaced from the antenna elongation axis. Using the determined certain characteristics, at least one orientation parameter is established which characterizes a positional relationship between the receiving position and the antenna on the path. The magnetic field may be transmitted as a monotone single phase signal. The orientation parameter may be a radial offset and/or an angular orientation between the receiving position and the antenna on the path. The antenna of the transmitter may be inserted into a first borehole to transmit the magnetic field to a receiver inserted into a second borehole.
    Type: Grant
    Filed: August 24, 2012
    Date of Patent: April 1, 2014
    Assignee: Merlin Technology Inc.
    Inventors: Guenter W. Brune, John E. Mercer, Albert W. Chau, Rudolf Zeller
  • Patent number: 8686731
    Abstract: A device rotates at least one static magnetic field about an axis, producing a rotating magnetic dipole field, and is movable in relation to the surface of the ground. The field is periodically sensed using a receiver to produce a receiver output responsive to the field. A positional relationship between the receiver and the device is monitored using the output. In one aspect, changing the positional relationship, by moving the device nearer to a boring tool which supports the receiver, causes an increase in accuracy of depth determination. In another aspect, determination of an actual overhead position of the boring tool, and its application, are described. Use of a plurality of measurements over at least one-half revolution of each magnet is disclosed. Establishing a surface radial direction toward a boring tool and resolution of multi-valued parameters is described. Calibration techniques, as well as a three transmitter configuration are also described.
    Type: Grant
    Filed: May 3, 2011
    Date of Patent: April 1, 2014
    Assignee: Merlin Technology, Inc.
    Inventors: Rudolf Zeller, Guenter W. Brune, Albert W. Chau, John E. Mercer
  • Patent number: 8680866
    Abstract: An electromagnetic energy transmitter is provided for borehole to surface electromagnetic (BSEM) surveying. The transmitter is lowered into a well borehole to a desired location in a well borehole to emit electromagnetic energy for the surveys. The transmitter affords more accurate measurements of its position in the well borehole. The transmitter also senses pressure and temperature conditions at its borehole location to provide indications of detected potential problems in the well from the survey or other sources, and to reduce risks and enhance safety and quality of the operations.
    Type: Grant
    Filed: April 20, 2011
    Date of Patent: March 25, 2014
    Assignees: Saudi Arabian Oil Company, BGP Arabia Co., Ltd.
    Inventors: Alberto Marsala, Mohammad H Al-Buali, Zhanxiang He, Tang Biyan
  • Publication number: 20140039796
    Abstract: A method of passive surveying comprises generating one or more detected signals by passively detecting a signal generated within a subsurface earth formation due to a seismoelectric response or an electroseismic response in at least one porous subsurface earth formation containing at least one fluid, and processing the one or more detected signals to determine at least one property of the subsurface earth formation.
    Type: Application
    Filed: October 2, 2013
    Publication date: February 6, 2014
    Inventors: Arthur Thompson, Alan Katz, Robert England, Mohammad Rahman, Naga P. Devineni
  • 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: 20130320984
    Abstract: Techniques for surface exploration and monitoring are presented. In representative embodiments, a system is provided that cars perform multiple types of measurements of a surface. For example a single system of survey probes and one or more survey controllers can be used to offer both seismic and electrical measurements. A survey controller can be configured to automatically poll survey probes to obtain identifiers of the probes aid determine a relative order the probes. Survey probes can be configured to; (a) collect signals associated with a surface; (b) digitize the signals to form digital data; and (c) store the digital data for later transmission to the survey controller. Relative positions of survey probes can be automatically determined using a transmitting beacon or other techniques. Survey probes can automatically disconnect from a power conduit while measuring a surface property and operate using an internal source of power when disconnected, to reduce noise.
    Type: Application
    Filed: February 18, 2013
    Publication date: December 5, 2013
    Applicant: ADVANCED GEOSCIENCES, INC
    Inventors: Mats Lagmanson, Liz Lagmanson, Markus Lagmanson, Bo Berglund
  • Publication number: 20130320985
    Abstract: An apparatus for making directional resistivity measurements of a subterranean formation includes a resistivity tool with a longitudinal axis and an outer surface, a first antenna deployed below the outer surface and having an axial mode coil for processing an axial electromagnetic wave and a transverse mode coil for processing a transverse electromagnetic wave to form a joint-coil structure, a second antenna deployed below the outer surface and spaced at an axial distance from the first antenna, at least two sets of slots with different orientations formed on the outer surface. A corresponding method for making directional resistivity measurements includes rotating a resistivity tool in a borehole, utilizing a transmitter-receiver antenna group formed in the resistivity tool to process a superimposition of the axial and transverse electromagnetic waves, and computing a resistivity-related measurement from the superimposition of the axial and transverse electromagnetic waves received on the receiver antenna.
    Type: Application
    Filed: June 5, 2012
    Publication date: December 5, 2013
    Inventors: Ce Liu, Zhong Wang, Suming Wu
  • Patent number: 8589079
    Abstract: A method of passive surveying comprises generating one or more detected signals by passively detecting a signal generated within a subsurface earth formation due to a seismoelectric response or an electroseismic response in at least one porous subsurface earth formation containing at least one fluid, and processing the one or more detected signals to determine at least one property of the subsurface earth formation.
    Type: Grant
    Filed: December 12, 2012
    Date of Patent: November 19, 2013
    Assignee: Hunt Energy Enterprises, LLC
    Inventors: Arthur Thompson, Alan Katz, Robert England, Mohammad Rahman, Naga P. Devineni