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公开(公告)号：US10386529B2
公开(公告)日：2019-08-20
申请号：US14944312
申请日：2015-11-18
Applicant: Schlumberger Technology Corporation
Inventor： Siddharth Misra , John Rasmus , Dean Homan , Carlos Torres-Verdin
Abstract: A method for determining a level of organic maturity of a shale gas formation includes inverting multifrequency complex conductivity data to estimate a volume fraction of graphite, turbostatic carbon nanostructures, and pyrite. The inversion is validated using estimates of the volume fraction of graphite, turbostatic carbon nanostructures, and pyrite. The volume fraction of graphite and turbostatic carbon nanostructures is correlated to a level of organic maturity log of the shale gas formation. The level of organic maturity log is validated using sulfur content obtained from pyrolysis or vitrinite reflectance. A variation of an electromagnetic response due to the volume fraction of graphite, turbostatic carbon nanostructures, and pyrite is quantified. The electromagnetic response is modified by removing the quantified variation to obtain resistivity and permittivity values.
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公开(公告)号：US20180113088A1
公开(公告)日：2018-04-26
申请号：US15569094
申请日：2016-04-29
Applicant: Schlumberger Technology Corporation
Inventor： Siddharth Misra , John Rasmus , Dean Homan
CPC classification number: G01N27/048 , G01V3/26 , G01V3/38 , Y02A90/344
Abstract: A method to estimate water saturation in electromagnetic measurements includes making an electromagnetic measurement and performing at least one of (a) creating an analytical forward model of the EM measurement, (b) creating a numerical finite difference forward model of the EM measurement, and (c) performing an inversion. The method also includes removing at least one petrophysically-adverse alteration of EM measurements in the frequency range from 1 Hz to 100 MHz. A petrophysically-adverse alteration is due to the presence of at least one of the following: pyrite, graphitic-precursors, magnetite, and other conductive minerals.
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公开(公告)号：US20240210589A1
公开(公告)日：2024-06-27
申请号：US18557837
申请日：2022-05-11
Applicant: Schlumberger Technology Corporation
Inventor： Mark Frey , Anatoly Dementyev , Dean Homan
IPC: G01V3/30 , E21B47/017 , H01Q1/52
CPC classification number: G01V3/30 , E21B47/017 , H01Q1/52
Abstract: A shield for deployment about an antenna on an electromagnetic logging tool includes an electrically conductive, hollow body configured for coaxial deployment about the antenna. The hollow body includes a plurality of slots that extend through the hollow body. An outer surface of the hollow body includes at least one recess, at least a portion of which extends between and substantially orthogonal to the plurality of slots.
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14.发明公开公开(公告)号：US20240201414A1
公开(公告)日：2024-06-20
申请号：US18553628
申请日：2021-04-28
Inventor： Ping Zhang , Gong Li Wang , Wael Abdallah , Dean Homan , Shouxiang Ma
CPC classification number: G01V3/38 , E21B44/00 , E21B49/00 , G01V3/30 , E21B2200/20
Abstract: A method for characterizing a subterranean formation is provided that involves obtaining resistivity log data measured by a logging-while-drilling electromagnetic tool operated while drilling a wellbore that traverses the subterranean formation, and calculating at least one of a first data value representing water saturation of the subterranean formation and a second data value representing cation exchange capacity (CEC) of the subterranean formation from the resistivity log data. In embodiments, the method can further involve storing at least one of the first data value and the second data value in computer memory, and/or outputting at least one of the first data value and the second data value as part of a log for well placement, formation evaluation. geological modeling, or reservoir management. The first data value and/or the second data value can also be used for geo-steering the drilling of the wellbore.
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公开(公告)号：US11747508B2
公开(公告)日：2023-09-05
申请号：US16940492
申请日：2020-07-28
Applicant: Schlumberger Technology Corporation
Inventor： Siddharth Misra , Dean Homan , Yuteng Jin , John Rasmus
Abstract: Aspects of the present disclosure relate to a method for determining a wettability of one or more types of solid particles within a geological formation. The method may include receiving a plurality of electromagnetic measurements within a frequency range from an electromagnetic well-logging tool. The method may also include determining a contact angle associated with at least one type of solid particles within the geological formation using the electromagnetic measurements.
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Patent Agency Ranking
公开(公告)号：US20230184987A1
公开(公告)日：2023-06-15
申请号：US17995209
申请日：2021-03-30
Applicant: Schlumberger Technology Corporation
Inventor： Gong Li Wang , Dean Homan
Abstract: Properties of a geological formation, such as dielectric constant and conductivity, may be determined by a propagation well log data acquired by a propagation well logging tool based at least in part on a relative longitudinal position of two or more receivers of the propagation well logging tool. In some embodiments, the relative longitudinal position of the at least two receivers is based at least in part on a first distance between a first receiver of the at least two receivers and a transmitter of the propagation well logging tool and a second distance between a second receiver of the at least two receivers and the transmitter.
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公开(公告)号：US20220381939A1
公开(公告)日：2022-12-01
申请号：US17771514
申请日：2020-10-27
Applicant: Schlumberger Technology Corporation
Inventor： Dean Homan , Natalie Uschner-Arroyo , Chang-Yu Hou , Denise Freed , John Rasmus
Abstract: A method for evaluating saturation of a kerogen bearing subterranean formation includes obtaining conductivity and permittivity values of the formation and providing an effective medium model relating the conductivity and the permittivity to a water filled porosity of the formation and an effective aspect ratio of graphitic kerogen particulate in the formation. The obtained conductivity and the permittivity values are input into the model which is in turn processed to compute the water filled porosity. The method may further optionally include evaluating the water filled porosity to estimate a hydrocarbon producibility of the formation.
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公开(公告)号：US20210199836A1
公开(公告)日：2021-07-01
申请号：US17203803
申请日：2021-03-17
Applicant: Schlumberger Technology Corporation
Inventor： Jung Kee Chung , Sameer Bhoite , Dean Homan , Edward Michael Tollefsen , Jaroslav Dobos
Abstract: An electromagnetic (EM) telemetry system includes an EM transmitter configured to transmit EM signals downhole and multiple sensors each configured to communicate with the EM transmitter and with another of the multiple sensors. Each sensor is placed a distance from another sensor along a length of a wellbore in the EM telemetry system. The EM telemetry system also includes a processor configured to select two or more sensors of the multiple sensors based on a signal to noise ratio (SNR) of an EM signal received from the two or more selected sensors, a depth of the EM transmitter, or both.
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公开(公告)号：US20180003849A1
公开(公告)日：2018-01-04
申请号：US15622197
申请日：2017-06-14
Applicant: Schlumberger Technology Corporation
Inventor： Jung Kee Chung , Sameer Bhoite , Dean Homan , Edward Michael Tollefsen , Jaroslav Dobos
Abstract: An electromagnetic (EM) telemetry system includes an EM transmitter configured to transmit EM signals downhole and multiple sensors each configured to communicate with the EM transmitter and with another of the multiple sensors. Each sensor is placed a distance from another sensor along a length of a wellbore in the EM telemetry system. The EM telemetry system also includes a processor configured to select two or more sensors of the multiple sensors based on a signal to noise ratio (SNR) of an EM signal received from the two or more selected sensors, a depth of the EM transmitter, or both.
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公开(公告)号：US20160187521A1
公开(公告)日：2016-06-30
申请号：US14827632
申请日：2015-08-17
Applicant: Schlumberger Technology Corporation
Inventor： Dean Homan , John Rasmus , Gerald Minerbo , Siddharth Misra , Aditya Gupta
Abstract: An electromagnetic measurement tool for making multi-frequency, full tensor, complex, electromagnetic measurements includes a triaxial transmitter and a triaxial receiver deployed on a tubular member. An electronic module is configured to obtain electromagnetic measurements at four or more distinct frequencies. The measurement tool may be used for various applications including obtaining a resistivity of sand layers in an alternating shale-sand formation; computing a dielectric permittivity, a conductivity anisotropy, and/or a permittivity anisotropy of a formation sample; and/or identifying formation mineralization including discriminating between pyrite and graphite inclusions and/or computing weight percent graphite and/or pyrite in the formation sample.
Abstract translation: 用于制造多频，全张力，复杂的电磁测量的电磁测量工具包括三轴发射器和部署在管状构件上的三轴接收器。 电子模块被配置为以四个或更多个不同的频率获得电磁测量。 测量工具可用于各种应用，包括在交替的页岩砂层中获得砂层的电阻率; 计算形成样品的介电常数，导电率各向异性和/或介电常数各向异性; 和/或识别地层矿化，包括区分黄铁矿和石墨夹杂物和/或计算地层样品中石墨和/或黄铁矿的重量百分比。
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