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公开(公告)号：US11719048B2
公开(公告)日：2023-08-08
申请号：US17060498
申请日：2020-10-01
Applicant: Schlumberger Technology Corporation
Inventor： Luis Eduardo DePavia , Jiuping Chen , Liang Sun , Richard Hunter
CPC classification number: E21B7/04 , E21B7/068 , E21B7/10 , E21B47/0228 , E21B47/13 , E21B49/087
Abstract: A method for steering a downhole tool includes receiving an electromagnetic (EM) signal from the downhole tool. The downhole tool is in a wellbore in a formation. The EM signal comprises a gap voltage and a gap current that are measured across a gap sub in the downhole tool. The method also includes determining a gap impedance based at least partially upon the gap voltage and the gap current. The method also includes determining a first formation resistivity at a first location in the wellbore based at least partially upon the gap impedance. The method also includes steering the downhole tool based at least partially upon the first formation resistivity.
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公开(公告)号：US10323510B2
公开(公告)日：2019-06-18
申请号：US15620009
申请日：2017-06-12
Applicant: Schlumberger Technology Corporation
Inventor： Luis Eduardo DePavia , Dean Homan , Robert Tennent , Gaelle Jannin , Liang Sun , Jiuping Chen
Abstract: A method for recovering data from a downhole tool in a wellbore includes measuring an electromagnetic signal using first and second sensors. At least a portion of the electromagnetic signal is transmitted by a downhole tool positioned in a first wellbore. The first and second sensors are each positioned at a different location along a length of a second wellbore. The electromagnetic signal measured by the first and second sensors is decoded to recover a property measured by the downhole tool.
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公开(公告)号：US20180335542A1
公开(公告)日：2018-11-22
申请号：US15775594
申请日：2016-11-03
Applicant: Schlumberger Technology Corporation
Inventor： Gaelle Jannin , Jiuping Chen , Andrew G. Brooks , David Kirk Conn , Luis Eduardo DePavia , Liang Sun , Michael W. Schwartz , Richard Hunter
Abstract: A method for placement of electrodes includes determining spatial distribution of a signal caused by generating an electromagnetic field in an instrument disposed in drill string used to drill a wellbore. The electromagnetic field comprises encoded measurements from tromagnetic at least one sensor associated with the instrument. Voltages induced by noise are measured across at least one pair of spaced apart electrodes placed at a plurality of positions spaced apart from a surface location of the wellbore. A spatial distribution of noise is estimated using the measured voltages. Positions for placement of at least two electrodes are selected using the spatial distribution of signal and the spatial distribution of noise.
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公开(公告)号：US11092005B2
公开(公告)日：2021-08-17
申请号：US16519555
申请日：2019-07-23
Applicant: Schlumberger Technology Corporation
Inventor： Luis Eduardo DePavia , Gaelle Jannin , Jiuping Chen
IPC: E21B47/13 , E21B47/092 , E21B7/04 , E21B45/00 , E21B47/024 , E21B49/00 , E21B49/08
Abstract: A surface system for an electromagnetic telemetry remote sensing wireless system includes a surface acquisition system configured to receive wireless signals and a plurality of nodes deployed at Earth's surface in a drilling area. Each of the nodes includes a distinct pair of first and second spaced apart electrodes and is configured to digitize voltage differences between the corresponding first and second electrodes and to wirelessly transmit the digitized voltage differences to the surface acquisition system. The voltage differences include an electromagnetic signal transmitted by a downhole tool deployed in a wellbore in the drilling area.
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公开(公告)号：US10401528B2
公开(公告)日：2019-09-03
申请号：US14951920
申请日：2015-11-25
Inventor： Nestor Cuevas , Michael Wilt , Ping Zhang , Jiuping Chen , Daniele Colombo , Gary Wayne McNeice
Abstract: In one embodiment, a method includes receiving one or more datasets including measured vertical electric and magnetic fields excited by one or more radial and azimuthal electric field antennas from a downtool into one or more processors, wherein each of the one or more datasets corresponds to a different position of the one or more radial azimuthal electric field antennas, simultaneously inverting the one or more datasets using the one or more processors, and as a result of the simultaneous inversion, generating by the one or more processors a three-dimensional (3D) image of a portion of the geological formation.
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Patent Agency Ranking
公开(公告)号：US10227868B2
公开(公告)日：2019-03-12
申请号：US15341835
申请日：2016-11-02
Applicant: Schlumberger Technology Corporation
Inventor： Luis E. DePavia , Jiuping Chen
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.
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公开(公告)号：US20170227667A1
公开(公告)日：2017-08-10
申请号：US15341835
申请日：2016-11-02
Applicant: Schlumberger Technology Corporation
Inventor： Luis E. DePavia , Jiuping Chen
CPC classification number: E21B47/122 , G01V3/08 , G01V3/081 , G01V3/083 , G01V3/10 , G01V3/18 , G01V3/26 , G01V3/28 , G01V2003/084
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.
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公开(公告)号：US20150177413A1
公开(公告)日：2015-06-25
申请号：US14223927
申请日：2014-03-24
Applicant: Schlumberger Technology Corporation
Inventor： Michael Wilt , Ping Zhang , Nestor Cuevas , Jiuping Chen
CPC classification number: G01V3/30
Abstract: Systems, methods, and apparatuses to generate a crosswell data set are described. In certain aspects, a method includes producing a first electromagnetic field at the earth's surface with a transmitter at a first location, detecting in a first borehole a first field signal induced by the first electromagnetic field, detecting in a second borehole a second field signal induced by the first electromagnetic field, and generating a crosswell data set from the first field signal and the second field signal. A formation model may be created from the crosswell data set.
Abstract translation: 描述了用于生成井间数据集的系统，方法和装置。 在某些方面，一种方法包括在第一位置处用发射机在地球表面产生第一电磁场，在第一钻孔中检测由第一电磁场引起的第一场信号，在第二钻孔中检测第二场信号 通过第一电磁场，并且从第一场信号和第二场信号产生井间数据集。 可以从井间数据集创建地层模型。
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公开(公告)号：US12110789B2
公开(公告)日：2024-10-08
申请号：US17247445
申请日：2020-12-11
Applicant: Schlumberger Technology Corporation
Inventor： Pavel Annenkov , Melisa Lourdes Ramirez Tovar , Robert Tennent , Sam Soundar , Jiuping Chen , Liang Sun , Richard Hunter , Wei Zhou
Abstract: Communication between the surface and a downhole location, such as a bottomhole assembly and/or an RSS is performed by electromagnetic downlink. Electromagnetic signals are transmitted from the surface through the formation at a frequency of 8 Hz or greater. Electromagnetic signals are transmitted and received while drilling or during drilling activities. In this manner, information and instructions may be transmitted to the BHA while drilling.
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公开(公告)号：US20190226328A1
公开(公告)日：2019-07-25
申请号：US16251120
申请日：2019-01-18
Applicant: Schlumberger Technology Corporation
Inventor： Jiuping Chen , Gaelle Jannin , Liang Sun
Abstract: A method for modeling an electromagnetic (EM) telemetry signal includes straightening a well in a model and dividing the well into a plurality of segments. The method also includes determining an electrical current in one or more of the segments when the well is straightened. The method also includes replacing the well with equivalent electrical sources based at least partially upon the electrical current in one or more of the segments. The method also includes bending the well back into its original shape in the model and determining the electrical current in one or more of the segments by projection when the well is back in its original shape. The method also includes summing EM fields for each of the one or more segments to estimate the EM telemetry signal.
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