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1189 条记录 (耗时 0.023 秒)

    Minimizing Azimuthal Current Induced on Tubulars by Transmitters
    82.
    发明申请
    Minimizing Azimuthal Current Induced on Tubulars by Transmitters 审中-公开

    公开(公告)号：US20180196006A1

    公开(公告)日：2018-07-12

    申请号：US15524080

    申请日：2016-04-21

    申请人： Halliburton Energy Services, Inc.

    发明人： Ilker R. Capoglu ,  Burkay Donderici

    IPC分类号： G01N27/90 ,  G01N33/24 ,  E21B47/00 ,  G01V3/28

    CPC分类号： G01N27/90 ,  E21B47/0006 ,  E21B47/01 ,  E21B47/09 ,  G01N33/24 ,  G01V3/00 ,  G01V3/28 ,  G01V3/30

    摘要： A tool and method for reducing azimuthal current. An EM induction tool may comprise a tubular, which may further comprise a body with a central axis and an insulating layer that may be non-azimuthally symmetric with respect to the central axis. The EM induction tool may further comprise a transmitter coupled to the tubular and a receiver coupled to the tubular. A method of reducing azimuthal current may comprise introducing a current through a transmitter into a subterranean formation, wherein the transmitter is coupled to a tubular, allowing an insulating layer of the tubular to at least partially block azimuthal currents originating from the transmitter from flowing on the tubular, wherein the insulating layer is non-azimuthally symmetric, and measuring eddy currents induced by the current with one or more receiver coupled to the tubular.

    Sensor system for downhole galvanic measurements
    83.
    发明授权
    Sensor system for downhole galvanic measurements 有权

    公开(公告)号：US09983329B2

    公开(公告)日：2018-05-29

    申请号：US15021980

    申请日：2015-06-05

    申请人： Halliburton Energy Services, Inc.

    发明人： Burkay Donderici ,  George David Goodman ,  Etienne Samson

    IPC分类号： G01V3/10 ,  G01V3/18 ,  G01V3/28 ,  G01V3/26 ,  E21B47/12

    CPC分类号： G01V3/28 ,  E21B47/123 ,  G01V3/26

    摘要： A downhole galvanic logging system including a first transmitter electrode configured to convey an exciter current into a formation and a second transmitter electrode configured to receive a return current from the formation. A first transmission line being coupled to the first transmitter electrode and configured to carry the exciter current, and a second transmission line being coupled to the second transmitter electrode and configured to carry the return current. The transmission lines can be arranged in a twisted pattern. A receiver device is positioned between the transmitter electrodes along an axial length of the downhole galvanic logging system. The receiver device can be configured to detect an electrical signal that is proportional to a resistivity of the formation. The second transmitter electrode can be coupled to one end of the receiver device with the second transmission line coupled to the second transmitter electrode through the receiver device.

    Look-ahead of the bit applications
    86.
    发明授权
    Look-ahead of the bit applications 有权

    公开(公告)号：US09971057B2

    公开(公告)日：2018-05-15

    申请号：US14110683

    申请日：2011-11-15

    申请人： Burkay Donderici ,  Michael S. Bittar

    发明人： Burkay Donderici ,  Michael S. Bittar

    IPC分类号： G01V3/38 ,  E21B7/04 ,  G01V3/28 ,  G01V3/26

    CPC分类号： G01V3/38 ,  E21B7/04 ,  G01V3/26 ,  G01V3/28

    摘要： Various embodiments include apparatus and methods of operation with respect to well logging. Apparatus and methods can include a tool having an arrangement of spaced apart transmitter antennas and receiver antennas in transmitter-receiver antenna pairs to make shallow measurements and deep measurements. The signals acquired from the shallow measurements and deep measurements can be processed to provide a look-ahead signal in a drilling operation. The transmitter and receiver antennas can be oriented to cancel or substantially cancel out signals from layers between the transmitter antenna and the receiver antenna in response to the transmitter being operated downhole in a well. Additional apparatus, systems, and methods are disclosed.

    Systems and methods for active cancellation of transient signals and dynamic loop configuration
    88.
    发明授权
    Systems and methods for active cancellation of transient signals and dynamic loop configuration 有权

    公开(公告)号：US09958568B2

    公开(公告)日：2018-05-01

    申请号：US14817772

    申请日：2015-08-04

    申请人： CGG Services SA

    发明人： Philip Miles ,  Jason Berringer

    IPC分类号： G01V3/00 ,  G01V3/02 ,  G01V3/08 ,  G01V3/28

    CPC分类号： G01V3/28

    摘要： A method and system for active cancellation of transient signals and dynamic loop configuration for geophysical exploration is disclosed. The method includes controlling a transmitter to transmit a waveform in a frequency spectrum during an on-time. The transmitter includes a plurality of turns of wire. The method also includes controlling a plurality of switches to direct an electrical signal through the plurality of turns of wire. The plurality of switches electrically coupled to the plurality of turns of wire. The method further includes controlling a switch of the plurality of switches to direct a first portion of a transient current in an opposite direction from a direction of a second portion of the transient current during an off-time.

    Determining resistivity anisotropy and formation structure for vertical wellbore sections
    89.
    发明授权
    Determining resistivity anisotropy and formation structure for vertical wellbore sections 有权

    公开(公告)号：US09933541B2

    公开(公告)日：2018-04-03

    申请号：US13166034

    申请日：2011-06-22

    申请人： Jian Yang

    发明人： Jian Yang

    IPC分类号： G01V3/28 ,  G01V3/30

    CPC分类号： G01V3/28

    摘要： Formation properties in a vertical section of a wellbore are determined by considering the vertical section as consisting of one or more segments. Measurements are obtained with a directional resistivity tool at two or more measurement stations within each segment for which the complex 0th harmonic coefficients for the obtained measurements are non-trivially different from one another. For each such segment, the phase shift and attenuation are determined using the complex 0th harmonic coefficients obtained for that segment and an inversion is performed for the formation properties using the determined phase shift and attenuation for that segment. Formation properties for that segment may be output to a display or memory storage device. For certain segments, one or more gain factors may be obtained. The gain factors are used to correct the measured voltages for certain neighboring segments and the corrected voltages inverted to obtain anisotropy and formation structure.

    Multifrequency processing to determine formation properties
    90.
    发明授权
    Multifrequency processing to determine formation properties 有权

    公开(公告)号：US09927551B2

    公开(公告)日：2018-03-27

    申请号：US14442932

    申请日：2013-12-27

    申请人： Halliburton Energy Services, Inc.

    发明人： Junsheng Hou ,  Luis Emilio San Martin ,  Dagang Wu ,  Burkay Donderici

    IPC分类号： G01V3/38 ,  E21B49/00 ,  G01V3/28 ,  E21B3/00 ,  E21B47/12

    CPC分类号： G01V3/38 ,  E21B3/00 ,  E21B47/122 ,  E21B49/00 ,  G01V3/28

    摘要： In some embodiments, an apparatus and a system, as well as a method and an article, may operate to obtain a plurality of measurements of a formation parameter, each measurement obtained in response to energy propagated into the formation at a plurality of frequencies of propagated energy; to process the measurements over each of the plurality of frequencies to obtain estimated values of the formation parameter; to select an estimated value from the obtained estimated values for each logging depth as a true measurement value for the logging depth based on one or more of the plurality of frequencies and a resistivity range; to generate a combination log that combines a plurality of the true measurement values for each logging depth; and to control a drilling operation based on the combination log. Additional apparatus, systems, and methods are disclosed.