Within A Borehole Patents (Class 324/355)
  • Patent number: 10927659
    Abstract: In some embodiments, an apparatus and a system, as well as a method and an article, may operate to estimate a value for a mud cake parameter to provide an estimated mud cake parameter value; to generate, in a solution operation, a formation parameter value and an adjusted mud cake parameter value using the estimated mud cake parameter value; and to provide corrected galvanic tool resistivity measurements based on at least the adjusted mud cake parameter value. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: December 11, 2015
    Date of Patent: February 23, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Luis Emilio San Martin, Burkay Donderici, Baris Guner
  • Patent number: 10914159
    Abstract: A method that includes deploying a casing with a multi-electrode configuration over a dielectric layer in a downhole environment. The method also includes collecting electromagnetic (EM) measurements using the multi-electrode configuration, and processing the EM measurements to obtain a characterization of fluids in an annulus between the casing and a borehole wall. A related system includes a casing deployed downhole, the casing having a multi-electrode configuration and a dielectric layer between the casing and the multi-electrode configuration. The system also includes a controller for directing collection of EM measurements using the multi-electrode configuration, and a processor that processes the EM measurements to obtain a characterization of fluids in an annulus between the casing and a borehole wall.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: February 9, 2021
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Mark Roberson, Scott Goodwin
  • Patent number: 10775527
    Abstract: An illustrative permanent electromagnetic (EM) monitoring system including a casing string positioned inside a borehole penetrating a formation, a source electrode attached to the casing string, an electrically insulating layer on an outer surface of the source electrode that provides a capacitive coupling of the source electrode to the formation, a power supply coupled to the source electrode which injects electrical current into the formation via the capacitive coupling, and a processing unit that determines a formation property based on at least the current received by a return electrode.
    Type: Grant
    Filed: March 25, 2014
    Date of Patent: September 15, 2020
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Glenn Andrew Wilson, Burkay Donderici
  • Patent number: 10677954
    Abstract: Method and articles for evaluating mud effect in imaging tool measurements are described. In an example, the method includes taking a plurality of measurements with a sensor positioned down a borehole, the sensor offset from a wall of the formation by a layer of mud, each measurement having an associated azimuth angle and depth. The plurality of measurements are related into a measurement set with each of the plurality of measurements having the same azimuth angle and depth within a designated depth range. The method includes determining, with a motion sensor, a relative position change of the sensor of each of the measurements within the measurement set and determining the offset of the sensor, one or more formation property, and one or more mud property.
    Type: Grant
    Filed: August 17, 2015
    Date of Patent: June 9, 2020
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Luis Emilio San Martin, Hsu-Hsiang Wu
  • Patent number: 10662768
    Abstract: Methods of determining a spatial distribution of an injected tracer material within a subterranean formation are disclosed, including flowing the tracer material, which includes a tracer electrical capacitance that differs from a formation electrical capacitance of a region of the subterranean formation, into the region of the subterranean formation via a wellbore. Subsequent to the flowing, the methods also include providing an input electromagnetic signal to the region of the subterranean formation. Responsive to the providing, the methods further include receiving an output electromagnetic signal from the subterranean formation. The methods further include determining the spatial distribution of the tracer material within the subterranean formation based, at least in part, on the output electromagnetic signal.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: May 26, 2020
    Assignee: ExxonMobil Upstream Research Company
    Inventors: Brent Wheelock, Mehmet Deniz Ertas, Lang Feng, Qiuzi Li, Harry W. Deckman
  • Patent number: 10662763
    Abstract: Models of fluid flow in wells in formation of a subsurface earth reservoir are formed by computers based on measurements obtained by well logging tools run in the wells and measurements of formation rock characteristics obtained from laboratory data. The models so formed are used to form measures of injection/production profiles and assist reservoir engineers in allocation of production and injection wells for the reservoir, and in other reservoir production planning and analysis.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: May 26, 2020
    Inventors: Mohammed H. Alshawaf, Lewis M. Warlick, Fahad A. Al-Ajmi
  • Patent number: 10502859
    Abstract: Apparatus and methods operable to determine a resistivity of a subterranean formation surrounding a wellbore. One such method includes using an apparent impedance function depending on a frequency variable and a plurality of unknown parameters, at least one of the unknown parameters depending on a formation impedance of the subterranean formation. The method also includes applying a voltage, at each of a plurality of frequency values, between electrodes of a resistivity tool that is disposed in the wellbore. The method also includes measuring, across the electrodes, a plurality of apparent impedance values, each corresponding to a different one of the frequency values. The method still further includes determining the unknown parameters based on the frequency values and the apparent impedance values, and estimating the formation resistivity based on an expression that includes at least one of the unknown parameters.
    Type: Grant
    Filed: August 6, 2015
    Date of Patent: December 10, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Emmanuel Legendre, Alexandre Abellan
  • Patent number: 10502856
    Abstract: Apparatus and techniques are described, such as for obtaining information indicative of a formation resistivity, such as using an array laterolog apparatus. For example, an electrical excitation is coupled from a well tool in a borehole to a geologic formation through which the borehole extends, the excitation coupled through excitation electrodes on the well tool selected according to a specified excitation mode, and induced voltages are received from the geologic formation resulting from the excitation using monitor electrodes selected according to the specified excitation mode. In some examples, a voltage difference between a first pair of monitor electrodes is estimated through use of the induced voltage received through at least one additional monitor electrode.
    Type: Grant
    Filed: August 14, 2013
    Date of Patent: December 10, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Burkay Donderici, Baris Guner
  • Patent number: 10422913
    Abstract: An electromagnetic field measuring device utilizes metamaterials to manipulate electromagnetic fields. Such a device is useful in a variety of applications including, for example, downhole gradiometric ranging.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: September 24, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ahmed E. Fouda, Burkay Donderici
  • Patent number: 10392919
    Abstract: Methods, systems, and devices for evaluating an earth formation intersected by a borehole using information from standard resolution measurements. Methods include generating an image representative of the formation over an interval of borehole depth, the image having a second resolution greater than the first resolution. Generating the image may be carried out by identifying layers corresponding to lithotype facies within the interval, the layers defined by boundaries having boundary locations along the borehole; and using a unified characterization of the formation within the interval determined from the standard resolution measurements and the boundary locations within the interval to solve for a value for the formation parameter corresponding to each layer consistent with the unified characterization of the interval. The unified characterization may be an average value for the formation parameter within the interval.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: August 27, 2019
    Assignee: BAKER HUGHES, A GE COMPANY, LLC
    Inventors: Jean-Baptiste Peyaud, Qiong Zhang
  • Patent number: 10255473
    Abstract: A method and a resistivity image logging tool connected or connectable to one or more processing devices process geological log data to construct missing information from destroyed or occluded parts using cues from observed data. The geological log data signals can be generated through use of the logging tool having one or more electrodes interacting with a formation intersected by a borehole. The processing involves the steps of: in respect of one or more data dimensions associated with missing values in a log data set, decomposing the signal into a plurality of morphological components; and morphologically reconstructing the signal such that missing values are estimated.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: April 9, 2019
    Assignee: Reeves Wireline Technologies Limited
    Inventors: Peter Adrian Spencer Elkington, Said Assous
  • Patent number: 10254431
    Abstract: In some embodiments, an apparatus, system, and method may operate to transmit a current from an electrode at a first azimuthal location into a borehole wall in a geological formation, and to receive the first current at a second electrode at a second azimuthal location in the borehole wall. The first and second azimuthal locations are disposed approximately along the same longitudinal location of the borehole wall. The current may be adjusted to maintain a selected voltage profile between the electrodes at the first and second azimuthal locations, and the electrodes at the first and second azimuthal locations may be members of two different sets of azimuthally] differentiated electrodes. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: December 30, 2014
    Date of Patent: April 9, 2019
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Luis Emilio San Martin
  • Patent number: 10227868
    Abstract: A method for signal communication between a well drilling instrument and the Earth's surface includes generating an electromagnetic field in an instrument disposed in drill string used to drill a wellbore. The electromagnetic field comprises encoded measurements from at least one sensor associated with the instrument. A signal is measured corresponding to an amplitude, phase or frequency of the electromagnetic field. The measurements are decoded from the measured signal. The measured signal comprises at least one of a voltage imparted across a capacitive electrode proximate ground surface and a galvanic electrode in contact with the ground surface, and a voltage imparted across two capacitive electrodes each proximate a ground surface and separated from each other by a known distance.
    Type: Grant
    Filed: November 2, 2016
    Date of Patent: March 12, 2019
    Assignee: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Luis E. DePavia, Jiuping Chen
  • Patent number: 10036825
    Abstract: The invention relates to measuring and generating electrical fields downhole. In one embodiment a system is provided that includes an amplifier connected to a first electrode in electrical contact with the Earth via an operative capacitive coupling. An additional electrode and amplifier are disposed in the borehole opposite the first electrode and constitute a first pair of electrodes spaced in a direction orthogonal to the axis. A second electrode is part of a group of counter electrodes spaced from each other and disposed outside the borehole. The first pair of electrodes and the amplifiers are configured to be one of a source that generates an electrical field in a direction substantially orthogonal to the axis of the borehole and a sensor that measures an electric field substantially orthogonal to the axis of the borehole.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: July 31, 2018
    Assignee: GroundMetrics, Inc.
    Inventors: Andrew Hibbs, Eli Glezer
  • Patent number: 9933543
    Abstract: An example method for downhole surveying and measuring may include receiving a measurement from a receiver of a conformable sensor, the measurement corresponding to a response of a downhole element to an electromagnetic signal generated by a transmitter of the conformable sensor. A parameter of the downhole element may be determined based, at least in part, on the received measurement. A visualization of a feature of the downhole element may be generated based, at least in part, on at least one of the received measurement and the determined parameter.
    Type: Grant
    Filed: September 30, 2014
    Date of Patent: April 3, 2018
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Neeraj Sethi, Jim Taylor Hill, Burkay Donderici
  • Patent number: 9879521
    Abstract: Disclosed embodiments include well ranging apparatus, systems, and methods which operate to measure electromagnetic field strength components associated with an electromagnetic field originating at a first well, via direct transmission or backscatter transmission, using at least one ranging electromagnetic field strength sensor attached to a housing, to provide ranging measurements. Further activities may include obtaining distorting field strength measurements using one or more reference electromagnetic field strength sensors, which may form or be attached in a closed loop path around the housing; and determining an approximate range between the first well and a second well in which the ranging electromagnetic field strength sensors are disposed, based on the ranging measurements and the distorting field strength measurements. Additional apparatus, systems, and methods are disclosed.
    Type: Grant
    Filed: August 4, 2015
    Date of Patent: January 30, 2018
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Hsu-Hsiang Wu, Burkay Donderici
  • Patent number: 9518851
    Abstract: Probes for an inspection system for a substantially round hole in a material are provided. One version of the probe may include a flexible sheet shaped and biased to substantially conform with a portion of an interior of the substantially round hole; and a plurality of sensors disposed on the flexible sheet, each sensor configured to transmit a non-destructive signal into the material for inspecting the substantially round hole.
    Type: Grant
    Filed: December 3, 2014
    Date of Patent: December 13, 2016
    Assignee: General Electric Company
    Inventors: Robert William Bergman, Thomas James Batzinger
  • Patent number: 9223046
    Abstract: An apparatus and method for estimating the at least one resistivity parameter using at least one processor to estimate capacitance information, wherein the capacitance information is estimated using only one selected frequency electromagnetic signal. The apparatus may include at least one measure electrode. The apparatus may also include a transverse antenna. The method may include imparting an electric current at only one selected frequency into a formation using the at least one measure electrode. The method may also include using capacitance information to estimate a standoff between the at least one measure electrode and a borehole wall. In some embodiments, the estimated capacitance information may be used to reduce errors due to eccentricity.
    Type: Grant
    Filed: October 1, 2010
    Date of Patent: December 29, 2015
    Assignee: BAKER HUGHES INCORPORATED
    Inventor: Yuliy Aleksandrovich Dashevsky
  • Patent number: 9081114
    Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. At least some of the guard electrodes are positioned between component electrodes of associated split monitor electrodes that enable more accurate measurement of the guard electrode potential. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: July 14, 2015
    Assignee: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Xiaochun Nie, Shanjun Li, Burkay Donderici, Luis E. San Martin
  • Patent number: 8994377
    Abstract: The invention is concerned with a tool and method for determining standoff from a formation though mud. The tool comprising a first electrode located at a distance from the formation for measuring a first impedance. A second electrode is located at a second distance from the formation for measuring a second impedance. A processing unit measures a difference between the first impedance and the second impedance, uses the difference to determine a conductivity of the mud and based thereon, determines the standoff of at least one of the first and the second electrode.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: March 31, 2015
    Assignee: Schlumberger Technology Corporation
    Inventor: Andrew Hayman
  • Publication number: 20150061683
    Abstract: Resistivity in subsurface earth at locations kilometers away from wells in the reservoirs is mapped and monitored. An electromagnetic source with an electrode is deployed a borehole in the reservoir, and a group of sensors at counter electrodes is deployed at a number of other locations radially spaced at some distance from the well. The source transmits a current which flows to the counter electrodes causing an electromagnetic field which is sensed at the sensors. The source is activated at different depths in the well and ratios of the electromagnetic field sensed with the source at different depths used to obtain data to map the resistivity. The sensors are capable of sensing electromagnetic fields along two orthogonal axes, and the measurements at a sensor along these axes used to reduce undesirable effects of noise and other factors on the data measurements.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 5, 2015
    Applicants: Groundmetrics, Inc., Saudi Arabian Oil Company
    Inventors: Alberto Marsala, Andrew Dennis Hibbs, Todor Petrov
  • Publication number: 20150061684
    Abstract: Errors produced in a borehole to surface electromagnetic (BSEM) survey by near surface electrical anomalies on the estimates of formation properties are reduced. The effects of variations in subsurface electrical resistivity near the surface are separated from electrical resistivity changes at locations in the formations of interest far from the measurement region. A survey system includes one or more electrodes to inject electrical current at formation depth within a borehole, one or more counter electrodes which collect such current on the surface of the earth, and one or more electrodes to inject current on the surface. A transmitter is selectively connectable to different sets of the electrodes to cause a current to flow between the selected electrode sets. The resultant fields from the current flow are sensed and processed. The effects of near surface anomalies are detectable in the data and removable from the survey data of interest regarding the formations.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 5, 2015
    Applicants: Groundmetrics, Inc., Saudi Arabian Oil Company
    Inventors: Alberto Marsala, Andrew Dennis Hibbs
  • Patent number: 8965702
    Abstract: Disclosed is an apparatus for estimating a property of an earth formation penetrated by a borehole. The apparatus includes a plurality of electrodes disposed downhole and configured to inject an electrical current into the earth formation using an applied voltage and/or measure electrical current resulting from an injection of the electrical current. The apparatus also includes a processor configured to perform a series of formation measurements that include injecting current into the earth formation using a unique subset of electrodes in the plurality of electrodes and measuring current in the earth formation using one or more electrodes not used for the current injecting. The processer sums the measured currents for the electrodes wherein the sum of electrical currents for at least one electrode that measured electrical current is substantially in phase with the applied voltage; and uses the sum of in phase currents to estimate the property.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: February 24, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Leonty A. Tabarovsky, Stanislav W. Forgang
  • Patent number: 8965704
    Abstract: Disclosed is an apparatus for estimating a property of an earth formation penetrated by a borehole containing an oil-based drilling fluid. The apparatus includes an electrode disposed at a carrier and configured to inject alternating current into the formation. An electrically conductive plate is disposed between the first electrode and a borehole wall. An electrical insulator is disposed between and contacts the first electrode and the conductive plate. The apparatus is configured to prevent the drilling fluid from being disposed between the first electrode and the conductive plate. A first sensor is used to measure an electric field established between the first electrode and the conductive plate. A processor is configured to receive a measurement of the electric field to use as a floating reference signal to determine a phase difference with respect to a measured electrical quantity related to the injected electrical current in order to estimate the property.
    Type: Grant
    Filed: January 27, 2012
    Date of Patent: February 24, 2015
    Assignee: Baker Hughes Incorporated
    Inventors: Leonty A. Tabarovsky, Stanislav W. Forgang
  • Patent number: 8947095
    Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means. This novel arrangement of currents provides a complete set of measurements that enables one tool to simultaneously emulate a whole range of laterolog tools.
    Type: Grant
    Filed: November 15, 2010
    Date of Patent: February 3, 2015
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Michael S. Bittar, Shanjun Li, Jing Li
  • Patent number: 8933700
    Abstract: The invention is concerned with a tool for imaging a formation, the tool comprising: a pad capable of alignment adjacent a wall of the formation. The pad has located thereon an imaging electrode for injecting current into the formation. There is a first return electrode separated from the imaging electrode for receiving the injected current. There is at least one recessed electrode that is located at a different distance from the wall of the formation as the other electrodes.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: January 13, 2015
    Assignee: Schlumberger Technology Corporation
    Inventor: Andrew Hayman
  • Patent number: 8901933
    Abstract: The invention is concerned with a tool and method for determining a downhole parameter. The tool is located in mud surrounded by a formation and comprising a first electrode spaced at a distance from the formation for measuring a first impedance. There is a second electrode located at a second distance from the formation for measuring a second impedance. There is a processing unit for measuring a difference between the first impedance and the second impedance and wherein the parameter is determined based on the difference.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: Andrew Hayman
  • Patent number: 8901932
    Abstract: The invention is concerned with a tool and method for imaging a formation through a substantially non-conductive medium. The tool comprises first circuitry for injecting a current into the formation, wherein a complex impedance to the current is measured. Second circuitry for determining a phase angle of an impedance of the non-conductive medium and third circuitry for determining a component of the complex impedance that is orthogonal to the phase angle.
    Type: Grant
    Filed: October 22, 2009
    Date of Patent: December 2, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: Andrew Hayman
  • Publication number: 20140347056
    Abstract: System and methods of generating calibrated downhole images of a subterranean formation (110) surrounding a wellbore (105). The method involves measuring open hole and cased hole measurements with a downhole tool (132); determining (698) open hole parameters (e.g., Z90) from the cased hole parameters, known parameters and the open hole measurements; and generating (699) downhole outputs from the determined open hole parameters.
    Type: Application
    Filed: December 20, 2012
    Publication date: November 27, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Andrew J. Hayman, Laetitia Comparon, Richard Bloemenkamp
  • Publication number: 20140306710
    Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. At least some of the guard electrodes are positioned between component electrodes of associated split monitor electrodes that enable more accurate measurement of the guard electrode potential. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means.
    Type: Application
    Filed: July 13, 2012
    Publication date: October 16, 2014
    Applicant: HALLIBURTON ENERGY SERVICES, INC.
    Inventors: Xiaochun Nie, Shanjun Li, Burkay Donderici, Luis E. San Martin
  • Patent number: 8847600
    Abstract: An apparatus for estimating a property of an earth formation penetrated by a borehole, apparatus including: a carrier configured to be conveyed through the borehole; a transducer disposed at the carrier and configured to transmit and/or receive electromagnetic energy into and/or from the earth formation to estimate the property; wherein the transducer includes a plurality of inductively coupled elements in a series, each element configured to transmit and/or receive electromagnetic energy and at least a first connection to a first element in the plurality and a second connection to a second element in the plurality with at least one of the first element and the second element being disposed between end transducer elements in the series.
    Type: Grant
    Filed: February 25, 2011
    Date of Patent: September 30, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Jack Signorelli, Samuel R. Bell, Stanislav W. Forgang, Sheng Fang
  • Publication number: 20140266214
    Abstract: A method and a system for providing electromagnetic measurement in a rock formation are provided. The system includes a borehole casing having a plurality of casing segments. At least two casing segments of the plurality of casing segments are electrically isolated from each other. The system further includes an electromagnetic source positioned on a surface of the earth. The electromagnetic source is connected to the at least two casing segments. The electromagnetic source is configured to energize the at least two casing segments so as to generate an electromagnetic field in the rock formation around the borehole casing.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: Chevron U.S.A. Inc.
    Inventors: David Lee Alumbaugh, Gary Michael Hoversten
  • Patent number: 8836325
    Abstract: A valve position sensor of a sliding sleeve of a flow control valve comprising a sleeve displacement converting means for converting a sleeve displacement into a radial displacement, and a measuring means for detecting the radial displacement and correlating the radial displacement to the position of the sliding sleeve within the flow control valve.
    Type: Grant
    Filed: March 18, 2009
    Date of Patent: September 16, 2014
    Assignee: Schlumberger Technology Corporation
    Inventors: Jerome Prost, Bernard Juchereau, Jean-Luc Garcia, Fabien Cens, Anthony Veneruso
  • Publication number: 20140239960
    Abstract: A system and method for imaging properties of subterranean formations in a wellbore is provided. The system comprises a formation sensor for collecting currents injected into the subterranean formations, the formation sensor positionable on a downhole tool deployable into the wellbore. The system comprises a controller for controlling the formation sensor and a formation imaging unit. The formation imaging unit comprises a current management unit for collecting data from the currents injected into the subterranean formations, the currents having at least two different frequencies. The formation imaging unit comprises a drilling mud data unit for determining at least one drilling mud parameter, a formation data unit for determining at least one formation parameter from the collected data, and an inversion unit for determining at least one formation property by inverting the at least one formation parameter.
    Type: Application
    Filed: May 7, 2014
    Publication date: August 28, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Tarek M. Habashy, Andrew J. Hayman, Yong-Hua Chen, Dzevat Omeragic, Philip S Cheung
  • Publication number: 20140197839
    Abstract: Techniques related to making resistivity measurements of an underground formation surrounding a borehole involve using a tool having an insulating pad mounted on the conductive body of the tool. The pad has a current injector electrode and a current return electrode electrically isolated from each other and mounted on a face of the pad. The pad is positionable in use to be adjacent the wall of the borehole. At least two impedance ratios are determined. The first is the ratio of the electrical impedance between the current injector electrode and the tool body and the electrical impedance between the current return electrode and the tool body. The second is the ratio of the electrical impedance between the current injector electrode and the formation, and the electrical impedance between the current return electrode and the formation on the other hand.
    Type: Application
    Filed: March 17, 2014
    Publication date: July 17, 2014
    Applicant: Schlumberger Technology Corporation
    Inventor: Richard Bloemenkamp
  • Publication number: 20140191762
    Abstract: A system and method for imaging properties of subterranean formations in a wellbore is provided. The system comprises a formation sensor for collecting currents injected into the subterranean formations, the formation sensor positionable on a downhole tool deployable into the wellbore. The system comprises a controller for controlling the formation sensor and a formation imaging unit. The formation imaging unit comprises a current management unit for collecting data from the currents injected into the subterranean formations, the currents having at least two different frequencies. The formation imaging unit comprises a drilling mud data unit for determining at least one drilling mud parameter, a formation data unit for determining at least one formation parameter from the collected data, and an inversion unit for determining at least one formation property by inverting the at least one formation parameter.
    Type: Application
    Filed: March 13, 2014
    Publication date: July 10, 2014
    Applicant: Schlumberger Technology Corporation
    Inventors: Yong-Hua Chen, Dzevat Omeragic, Tarek M. Habashy, Richard J. Bloemenkamp
  • Patent number: 8775084
    Abstract: Disclosed is an adaptive borehole correction (ABC) technique based on an inversion approach that advantageously corrects shallow laterolog measurements for borehole effects, including determining and accounting for unknown tool eccentricity. The algorithm is based on simplex radial 1-D inversion where at every logging up to four unknowns are determined, namely tool eccentricity, Rt, Rxo, and Lxo. After that a borehole correction methodology is employed wherein the tool response in a borehole with real mud resistivity Rm is modified to a response in the borehole with virtual mud resistivity equal to Rxo.
    Type: Grant
    Filed: September 19, 2008
    Date of Patent: July 8, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Michael Boris Rabinovich, Bill H. Corley
  • Patent number: 8760167
    Abstract: Techniques related to making resistivity measurements of an underground formation surrounding a borehole involve using a tool having a pad mounted on the body of the tool. The pad has a current injector electrode and a current return electrode mounted on the pad face and arranged such that the current injector and return electrodes are electrically isolated from each other when in use. Two impedance ratios are determined. The first is a ratio of the electrical impedance between the current injector electrode and the tool body, and the electrical impedance between the current return electrode and the tool body. The second is a ratio of the electrical impedance between the current injector electrode and the formation, and the electrical impedance between the current return electrode and the formation. The tool is arranged such that the two impedance ratios differ by 25% or less of the larger impedance ratio.
    Type: Grant
    Filed: January 18, 2011
    Date of Patent: June 24, 2014
    Assignee: Schlumberger Technology Corporation
    Inventor: Richard Bloemenkamp
  • Publication number: 20140132272
    Abstract: A method analyzes a subterranean formation. At least one property of a well casing in the subterranean formation is determined and a plurality of current source vectors at respective positions along a trajectory of the well casing are determined. The effect of the well casing is determined based upon the plurality of current source vectors and the at least one property of the well casing.
    Type: Application
    Filed: June 26, 2013
    Publication date: May 15, 2014
    Inventors: Nestor Cuevas, David L. Alumbaugh, Edward Nichols
  • Patent number: 8704524
    Abstract: An apparatus and method for conducting resistivity logging in a borehole. The apparatus may include a housing configured for fluid isolation, an electrical conductor penetrating the housing and a sealing interface. The apparatus may also include at least one of: an electrical component inside the housing and an electrode disposed on the exterior of the housing. The apparatus is configured to allow the electrical conductor to be moved, while maintaining the sealing interface, between an electrically connected state and an electrically disconnected state with at least one of: the electrical component and the electrode. The method may include using the apparatus for resistivity logging operations.
    Type: Grant
    Filed: September 14, 2011
    Date of Patent: April 22, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Allan R. Jones, Randy Gold
  • Patent number: 8633701
    Abstract: A formation measurement and processing technique which reduces the effects of standoff between a resistivity tool and a borehole wall where the resistivity tool utilizes capacitive coupling between the tool and the formation to obtain resistivity data useful to generate a resistivity image of the formation. Reduction of standoff effects is achieved through the use of multi-frequency, phase sensitive measurements to identify a measured resonance frequency that may be used to produce an image that utilizes measurements least affected by the tool standoff and unknown or unspecified inductance of the tool. Reduction of standoff effects are the most pronounced in the case of the low resistivity formations and oil-based, low-conductive drilling fluids.
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: January 21, 2014
    Assignee: Baker Hughes Incorporated
    Inventors: Gregory B. Itskovich, Alexandre N. Bespalov
  • Patent number: 8631866
    Abstract: A method of treating a subsurface formation includes circulating at least one molten salt through at least one conduit of a conduit-in-conduit heater located in the formation to heat hydrocarbons in the formation to at least a mobilization temperature of the hydrocarbons. At least some of the hydrocarbons are produced from the formation. An electrical resistance of at least one of the conduits of the conduit-in-conduit heater is assessed to assess a presence of a leak in at least one of the conduits.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: January 21, 2014
    Assignee: Shell Oil Company
    Inventor: Scott Vinh Nguyen
  • Patent number: 8614579
    Abstract: Disclosed is an apparatus for estimating a property of an earth formation penetrated by a borehole having a substantially non-conducting liquid. The apparatus includes: a downhole tool having a transmitter electrode configured to convey an electric current into the earth formation. A measurement electrode is configured to receive the electric current from the earth formation, wherein the electric current bridges as least one of a first gap between the transmitter electrode and the formation and a second gap between the measurement electrode and the formation. A compensating circuit coupling the transmitter electrode to the measurement electrode is configured to reduce a reactive component of a total current received by the measurement electrode. A receiver coupled to the measurement electrode is configured to measure the total current to estimate the property.
    Type: Grant
    Filed: July 20, 2011
    Date of Patent: December 24, 2013
    Assignee: Baker Hughes Incorporated
    Inventors: Stanislav Wilhelm Forgang, Randy Gold
  • Patent number: 8604796
    Abstract: A steerable or non-steerable, magnetic dipole antenna for Measurement-While-Drilling (MWD) or Logging-While-Drilling (LWD) applications. The antenna elements use a hole arrangement in addition to grooves in a steel tool body, which is typically a drill collar. This antenna embodiment is extremely robust, meaning that does not significantly reduce the structural integrity of the tool body in which it is disposed. The antenna embodiment is also relatively wear resistant. The resultant magnetic dipole generated by this antenna is also electrically steerable in inclination angle from a common origin. A variable dipole moment inclination angle combined with independently measured tool rotation orientation during normal drilling allows the antenna to generate a magnetic dipole moment that may be directed at any three dimensional angle and from a common origin point at the centroid of the antenna. The antenna can also be embodied to be more sensitive to resistivity in a particular azimuthal direction.
    Type: Grant
    Filed: April 12, 2011
    Date of Patent: December 10, 2013
    Assignee: Precision Energy Services, Inc.
    Inventors: Macmillan M. Wisler, Larry W. Thompson, Jian-Qun Wu, Lance Pate
  • Patent number: 8598882
    Abstract: A method of monitoring an extent of a hydrocarbon reservoir (2) below the earth's surface (4), includes the steps of applying a current between a bottom current electrode (6) and a top current electrode (8) that is part of a plurality of electrodes that are spaced apart from one another along a part of the earth's surface located above and optionally over the hydrocarbon reservoir. The bottom current electrode is positioned below the hydrocarbon reservoir. The method includes the step of measuring an electrical potential, which is caused by the current, by means of a measurement electrode (10A) that is also part of the plurality of electrodes. The method includes the step of inferring from the measured electrical potential the extent of the hydrocarbon reservoir, in a direction that is oriented substantially parallel with the earth's surface.
    Type: Grant
    Filed: May 19, 2010
    Date of Patent: December 3, 2013
    Assignee: Nederlandse Organisatie Voor toegepast-natuurwetenschappelijk Onderzoek TNO
    Inventor: Jozef Antonius Chrysostomus Meekes
  • Publication number: 20130293234
    Abstract: Systems, tools and techniques for measuring downhole parameters are provided. The techniques involve providing a downhole tool with a sensing apparatus. The sensing apparatus has at least one source positionable about the downhole tool, at least one sensor electrode positionable about a front face of the downhole tool for measuring electrical signals from the source, and a raised insulating cover positionable along the front face of the downhole tool for defining at least one contact surface. The raised insulating cover extends over at least a portion of the sensor electrode whereby the sensor electrode is positionable adjacent to the subterranean formation for electrically coupling thereto without direct contact therewith.
    Type: Application
    Filed: December 7, 2011
    Publication date: November 7, 2013
    Inventors: Andrew J. Hayman, Gregoire Jacob
  • Publication number: 20130293235
    Abstract: The present disclosure provides an apparatus and method for measuring electrical properties of an underground formation surrounding a borehole. The apparatus preferably comprises a downhole tool positionable in the borehole, a sensor pad positionable on the downhole tool, and a plurality of electrodes mounted on the sensor pad and configured to face a wall of the borehole. The apparatus further comprises an insulating layer extending over at least a portion of the plurality of electrodes facing the wall of the borehole.
    Type: Application
    Filed: December 7, 2011
    Publication date: November 7, 2013
    Inventor: Andrew J. Hayman
  • Publication number: 20130257436
    Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means. This novel arrangement of currents provides a complete set of measurements that enables one tool to simultaneously emulate a whole range of laterolog tools.
    Type: Application
    Filed: November 15, 2010
    Publication date: October 3, 2013
    Inventors: Michael S. Bittar, Shanjun Li, Jing Li
  • Publication number: 20130234718
    Abstract: Multi-array laterolog tool systems and methods acquire a set of array measurements sufficient to provide laterolog tool measurements of differing array sizes. Such systems and method offer multiple depths of investigation while offering greater measurement stability in borehole environments having high resistivity contrasts. In at least some system embodiments, a wireline or LWD tool body has a center electrode positioned between multiple pairs of guard electrodes and a pair of return electrodes. The tool's electronics provide a current from the center electrode to the pair of return electrodes and currents from each pair of guard electrodes to the pair of return electrodes. Each of the currents may be distinguishable by frequency or distinguishable by some other means. This novel arrangement of currents provides a complete set of measurements that enables one tool to simultaneously emulate a whole range of laterolog tools.
    Type: Application
    Filed: November 2, 2011
    Publication date: September 12, 2013
    Inventors: Shanjun Li, Luis E. San Martin, Michael S. Bittar, Jing Li
  • Patent number: 8471562
    Abstract: Embodiments of a multi-axial antenna system and system for measuring subsurface formations are generally described herein. Other embodiments may be described and claimed. In some embodiments, the multi-axial antenna system comprising at least two co-located coils wound around a torroidal-shaped bobbin. Each coil generates a magnetic field in a mutually orthogonal direction. Signals provided to the coils may be adjusted to simulate a tilted-coil antenna system.
    Type: Grant
    Filed: September 15, 2006
    Date of Patent: June 25, 2013
    Assignee: Halliburton Energy Services, Inc.
    Inventor: Sergey Knizhnik