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公开(公告)号：US10302805B2
公开(公告)日：2019-05-28
申请号：US15126648
申请日：2015-03-26
Applicant: Schlumberger Technology Corporation
Inventor： Mark T. Frey
Abstract: A method for making downhole electromagnetic logging while drilling measurements includes rotating an electromagnetic logging while drilling tool in a subterranean wellbore. The logging while drilling tool includes at least first and second tilted transmitter antennas longitudinally spaced along a logging while drilling tool body and at least first and second tilted receiver antennas. A plurality of electromagnetic voltage measurements is acquired at the first and second tilted receiver antennas while rotating and processed to compute harmonic voltage coefficient. Ratios of selected ones of the harmonic voltage coefficients are then processed to compute at least one gain compensated measurement quantity.
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公开(公告)号：US10191179B2
公开(公告)日：2019-01-29
申请号：US15193321
申请日：2016-06-27
Applicant: Schlumberger Technology Corporation
Inventor： Mark T. Frey
Abstract: An arrangement for generating a resistivity image having a drill bit with cutters configured to be placed within a wellbore, the cutters configured to create further sections of the wellbore upon rotation, the drill bit having an end with threads for engagement, at least one section of drill string connected to the drill bit through a matching set of threads for engagement, a receiver toroid connected to the at least one section of drill string along at least a portion of the drill string, a transmitter toroid connected to the at least one section of drill string and located at least a portion of the drill string away from the receiver toroid, at least one stabilizer connected to the at least one section of drill string, a power source connected to the transmitter toroid and the receiver toroid, an electrode arrangement placed at the drill bit, wherein the electrode arrangement is electrically connected to the drill bit through a non-linear circuit element and a computer arrangement connected to the receiver toroid.
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公开(公告)号：US20180292563A1
公开(公告)日：2018-10-11
申请号：US15764614
申请日：2016-09-26
Applicant: Schlumberger Technology Corporation
Inventor： Helen Xiaoyan Zhong , Steve F. Crary , Ettore Mirto , Christophe Dupuis , Weixin Dong , Mark T. Frey
Abstract: Methods capable of determining a depth of investigation of a logging tool can include generating an error distribution model for a logging tool. The methods can also include defining a detection threshold above which a measured signal from a measurement channel of the logging tool can be considered reliable based on output from the error distribution model, and generating a simulated formation model to determine the depth of investigation. The depth of investigation can be biased by the detection threshold.
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公开(公告)号：US09618647B2
公开(公告)日：2017-04-11
申请号：US14525088
申请日：2014-10-27
Applicant: Schlumberger Technology Corporation
Inventor： Mark T. Frey
Abstract: A method for making downhole electromagnetic logging while drilling measurements includes rotating an electromagnetic logging while drilling tool in a subterranean wellbore. The logging tool includes a plurality of transmitter antennas and a plurality of receiver antennas symmetrically spaced along a logging while drilling tool body, the plurality of transmitter antennas including at least one axial transmitter antenna and at least one transverse transmitter antenna. The plurality of receiver antennas includes at least one axial receiver antenna and at least one transverse receiver antenna. The receiver antennas are used to acquire electromagnetic voltage measurements while rotating. The voltage measurements are processed to compute harmonic voltage coefficients, selected ratios of which are processed to compute gain compensated symmetrized and anti-symmetrized quantities and angles. These quantities may optionally be further processed to compute rotated gain compensated symmetrized and anti-symmetrized quantities.
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公开(公告)号：US11307323B2
公开(公告)日：2022-04-19
申请号：US15764614
申请日：2016-09-26
Applicant: Schlumberger Technology Corporation
Inventor： Helen Xiaoyan Zhong , Steve F. Crary , Ettore Mirto , Christophe Dupuis , Weixin Dong , Mark T. Frey
Abstract: Methods capable of determining a depth of investigation of a logging tool can include generating an error distribution model for a logging tool. The methods can also include defining a detection threshold above which a measured signal from a measurement channel of the logging tool can be considered reliable based on output from the error distribution model, and generating a simulated formation model to determine the depth of investigation. The depth of investigation can be biased by the detection threshold.
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Patent Agency Ranking
公开(公告)号：US20180347280A1
公开(公告)日：2018-12-06
申请号：US15764832
申请日：2016-09-26
Applicant: Schlumberger Technology Corporation
Inventor： Helen Xiaoyan Zhong , Steve F. Crary , Mark T. Frey
CPC classification number: E21B7/04 , G01V3/28 , G01V11/005
Abstract: A drill string can include an electromagnetic transmitter oriented at an actual effective tilt angle with respect to the drill string and an electromagnetic receiver oriented at an actual effective tilt angle with respect to the drill string. The transmitter and received can be used to investigate geologic formations surrounding the drill string, and measurements of the geologic formations can be based on the actual effective tilt angles of the transmitter and the receiver. Forward modelling software can use the actual effective tilt angles of the transmitter and the receiver to predict measurements of the geologic formations
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公开(公告)号：US20170370212A1
公开(公告)日：2017-12-28
申请号：US15193321
申请日：2016-06-27
Applicant: Schlumberger Technology Corporation
Inventor： Mark T. Frey
IPC: E21B49/00 , G01V3/20 , E21B47/022 , E21B17/10 , E21B3/00 , E21B10/60 , E21B10/567 , E21B10/42 , G01V3/38 , E21B41/00
CPC classification number: G01V3/38 , E21B47/0002 , G01V3/20
Abstract: An arrangement for generating a resistivity image having a drill bit with cutters configured to be placed within a wellbore, the cutters configured to create further sections of the wellbore upon rotation, the drill bit having an end with threads for engagement, at least one section of drill string connected to the drill bit through a matching set of threads for engagement, a receiver toroid connected to the at least one section of drill string along at least a portion of the drill string, a transmitter toroid connected to the at least one section of drill string and located at least a portion of the drill string away from the receiver toroid, at least one stabilizer connected to the at least one section of drill string, a power source connected to the transmitter toroid and the receiver toroid, an electrode arrangement placed at the drill bit, wherein the electrode arrangement is electrically connected to the drill bit through a non-linear circuit element and a computer arrangement connected to the receiver toroid.
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公开(公告)号：US09766365B2
公开(公告)日：2017-09-19
申请号：US14525075
申请日：2014-10-27
Applicant: Schlumberger Technology Corporation
Inventor： Mark T. Frey
Abstract: A method for making downhole electromagnetic logging while drilling measurements includes rotating an electromagnetic logging while drilling tool in a subterranean wellbore. The logging tool includes first and second transmitters, each of which includes a tilted antenna, and a receiver axially spaced apart from one another. Electromagnetic voltage measurements are made at the receiver while the tilted transmitting antenna in the first transmitter fires during tool rotation. The electromagnetic voltage measurements are mathematically rotated through at least the arbitrary angle to obtain rotated measurements, selected ratios of which are processing to compute gain compensated measurement quantities.
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9.发明申请公开(公告)号：US20170075024A1
公开(公告)日：2017-03-16
申请号：US14853322
申请日：2015-09-14
Applicant: Schlumberger Technology Corporation
Inventor： Peter T. Wu , Mark T. Frey
CPC classification number: G01V3/30
Abstract: A method for making downhole electromagnetic logging measurements includes using an electromagnetic measurement tool to acquire the measurements while rotating in a subterranean wellbore. Received electromagnetic waves are processed to obtain harmonic voltage coefficients, ratios of which are in turn further processed to compute gain compensated measurement quantities. The gain compensated measurement quantities are further processed to compute at least one of an apparent formation azimuth of the formation through which the wellbore traverses, an apparent tool eccentering azimuth, and an eccentering distance of the logging tool in the wellbore.
Abstract translation: 用于制造井下电磁测井测量的方法包括使用电磁测量工具在地下井眼中旋转时获取测量值。 接收的电磁波被处理以获得谐波电压系数，其比例又被进一步处理以计算增益补偿测量量。 增益补偿测量量被进一步处理以计算井眼横穿的地层的表观形成方位角，表观工具偏心方位角和测井工具在井眼中的偏心距离中的至少一个。
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公开(公告)号：US11092713B2
公开(公告)日：2021-08-17
申请号：US15773818
申请日：2016-10-14
Applicant: Schlumberger Technology Corporation
Inventor： Peter T. Wu , Mark T. Frey
Abstract: A method for making downhole electromagnetic logging measurements of a subterranean formation is disclosed. An electromagnetic logging tool is rotated in a subterranean wellbore. The tool includes a transmitter axially spaced apart from a receiver. The transmitter may include an axial transmitting antenna and at least one transverse transmitting antenna and the receiver may include an axial receiving antenna and at least one transverse receiving antenna. The transmitting antennas transmit corresponding electromagnetic waves into the subterranean wellbore. The receiving antennas receive corresponding voltage measurements which are processed to compute harmonic voltage coefficients. Ratios of the selected harmonic voltage coefficients are processed to compute gain compensated, azimuthally invariant measurement quantities.
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