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公开(公告)号：US20180321414A1
公开(公告)日：2018-11-08
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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Patent Agency Ranking
公开(公告)号：US20180321413A1
公开(公告)日：2018-11-08
申请号：US15773638
申请日：2016-10-14
Applicant: Schlumberger Technology Corporation
Inventor： Helen Xiaoyan Zhong , Mark T. Frey , Peter T. Wu
Abstract: A method for making gain compensated electromagnetic logging measurements of a subterranean formation includes rotating an electromagnetic logging tool in a subterranean wellbore. The logging tool includes a transmitter having at least one transmitting antenna axially spaced apart from a receiver having at least one receiving antenna. Electromagnetic waves are transmitted into the subterranean wellbore using the at least one transmitting antenna. Voltage measurements corresponding to the transmitted electromagnetic waves are received at the receiving antenna. The voltage measurements are processed to compute real and imaginary directional resistivity measurement quantities.
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公开(公告)号：US20170082776A1
公开(公告)日：2017-03-23
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：US20160116628A1
公开(公告)日：2016-04-28
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.
Abstract translation: 用于在钻探测量时进行井下电磁测井的方法包括在钻井工具在地下井眼中旋转电磁测井。 测井工具包括多个发射器天线和多个接收器天线，多个接收器天线沿钻井工具主体沿着测井对称地间隔开，多个发射器天线包括至少一个轴向发射器天线和至少一个横向发射器天线。 多个接收机天线包括至少一个轴向接收机天线和至少一个横向接收机天线。 接收机天线用于在旋转时采集电磁电压测量值。 电压测量被处理以计算谐波电压系数，其选择的比率被处理以计算增益补偿的对称化和反对称化的量和角度。 这些量可以可选地被进一步处理以计算旋转增益补偿对称和反对称化量。
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公开(公告)号：US10386528B2
公开(公告)日：2019-08-20
申请号：US14853322
申请日：2015-09-14
Applicant: Schlumberger Technology Corporation
Inventor： Peter T. Wu , Mark T. Frey
IPC: 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.
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公开(公告)号：US20160116627A1
公开(公告)日：2016-04-28
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.
Abstract translation: 用于在钻探测量时进行井下电磁测井的方法包括在钻井工具在地下井眼中旋转电磁测井。 测井工具包括第一和第二发射器，每个发射器包括倾斜天线和彼此轴向间隔开的接收器。 在接收器处进行电磁电压测量，而第一发射器中倾斜的发射天线在刀具旋转期间触发。 电磁电压测量在数学上至少旋转任意角度以获得旋转的测量值，其选择的比例正在处理以计算增益补偿测量量。
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