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公开(公告)号：US20240310551A1
公开(公告)日：2024-09-19
申请号：US18550262
申请日：2022-05-20
发明人： Daniel C. MINETTE , Curtis LENTZ
摘要： An apparatus for compensated formation evaluation has an outer housing; an inner housing disposed within the outer housing; an emitter disposed within the inner housing; a first sensor disposed within the inner housing; a first window in the outer housing, positioned about the emitter, to permit signals from the emitter to pass out of the outer housing; a second window in the outer housing, positioned about the first sensor, to permit signals to reach the first sensor from out of the outer housing; a second sensor disposed within the inner housing.
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公开(公告)号：US11933935B2
公开(公告)日：2024-03-19
申请号：US17455128
申请日：2021-11-16
发明人： Jin-Hong Chen , Stacey M. Althaus , Houzhu Zhang
CPC分类号： G01V5/12 , E21B47/111 , G01V5/045
摘要： A method may include obtaining, using a gamma-ray detector, first acquired gamma-ray data regarding a first core sample. The first acquired gamma-ray data may correspond to various sensor steps. The method may further include determining a sensitivity map based on the first acquired gamma-ray data. The method may further include obtaining, using the gamma-ray detector, second acquired gamma-ray data regarding a second core sample at the sensor steps. The method further includes generating a gamma-ray log using the sensitivity map and a gamma-ray inversion process.
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公开(公告)号：US11867052B1
公开(公告)日：2024-01-09
申请号：US16653651
申请日：2019-10-15
申请人： EOG Resources, Inc.
发明人： Kacey McCauley , Hung Nguyen , Madhukar Thumma , Tri Phan , Sandeep Bhakhri , Brian Tapp , Jay Ramineni
CPC分类号： E21B49/00 , E21B41/0092 , E21B44/00 , G01V5/12 , G01V99/005
摘要： Methods and systems for controlling a drilling operation in a subterranean formation are disclosed. The method includes generating a simulated well log based, at least in part, on a subset of an MWD log from a horizontal well, wherein the subset of the MWD log is for measured depths between a starting measured depth and an ending measured depth. The method further includes monitoring and/or controlling a drilling operation based, at least in part, on the simulated well log.
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公开(公告)号：US20230204814A1
公开(公告)日：2023-06-29
申请号：US17927749
申请日：2021-05-25
发明人： Dengyun Lu , Jing Bai , Lei Li , Jichuan Zhang , Chongjun Huang , Chong Liao , Junbin Chen , Bin Zhang , Zhigang Dong , Xinjian Wang
IPC分类号： G01V5/12
CPC分类号： G01V5/12
摘要： A gamma fusion computing method based on gamma probe parameters is provided, which relates to the technical field of oil drilling equipment while drilling, including: acquiring measurement values of two gamma probes in one continuous rotation period, and utilizing a mean value and a variance of the measurement values in the one rotation period as an evaluation reference value of each gamma probe; determining whether the gamma probes are abnormal, if the two gamma probes are both normal, utilizing the weight values to perform weight fusion on the measured values measured by two gamma probes, and if there is a gamma probe that is abnormal, then multiplying the average of the measured values of the normal gamma probe in the rotation period by 2 as a gamma output value for output. The gamma fusion computing method is capable of accurately determine the abnormal conditions of the gamma probes and effectively resolve the abnormal output. If there is no abnormal gamma probe, the outputted gamma value is also more accurate, which may do well in providing the engineering and technical personnel with correct identification.
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5.发明公开公开(公告)号：US20230194748A1
公开(公告)日：2023-06-22
申请号：US18109940
申请日：2023-02-15
发明人： Philip Teague , Alex Stewart
IPC分类号： G01V5/12 , G01V5/10 , E21B47/005
CPC分类号： G01V5/12 , G01V5/104 , E21B47/005
摘要： An x-ray based cement evaluation tool for measurement of the density of material volumes within single, dual and multiple-casing wellbore environments is provided, wherein the tool uses x-rays to illuminate the formation surrounding a borehole, and a plurality of detectors are used to directly measure the density of the cement annuli and any variations in density within The tool uses x-rays to illuminate the casing surrounding a borehole and a plurality of multi-pixel imaging detectors directly measure the thickness of the casing The tool includes an internal length having a sonde section, wherein the sonde section further includes an x-ray source; a radiation shield for radiation measuring detectors; sonde-dependent electronics; and a plurality of tool logic electronics and PSUs. Other systems and subsystems appropriate for carrying out the foregoing are also disclosed, as are a plurality of example methods of use therefor.
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公开(公告)号：US20230184990A1
公开(公告)日：2023-06-15
申请号：US18077808
申请日：2022-12-08
发明人： Feyzi Inanc , Allan Jones , Peng Yuan , Toyli Anniyev , Marc Ramirez
IPC分类号： G01V5/12
CPC分类号： G01V5/12
摘要： A downhole logging system includes a gamma ray source positioned within a logging tool. The system further includes a collimator associated with the gamma ray source, the collimator having an opening to direct a flow of radiation into the formation. The system also includes a radiation detector operable to detect backscatter radiation from the area. The system further includes a motor to rotate the collimator in either a continuous or stepping fashion for scanning a borehole and an actuator associated with the gamma ray source. The actuator moves the gamma ray source between a first position and a second position, the first position being misaligned with the opening and the second position being aligned with the opening.
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公开(公告)号：US11665806B2
公开(公告)日：2023-05-30
申请号：US16722887
申请日：2019-12-20
发明人： Jani Reijonen , Vincent Ernst
IPC分类号： G01V5/10 , G01V5/12 , H05G1/52 , H01J35/14 , G01N23/203
CPC分类号： H05G1/52 , G01V5/10 , G01V5/12 , H01J35/153 , G01N2223/053 , G01N2223/063 , G01N2223/106 , G01N2223/1016 , G01N2223/304 , G01N2223/616
摘要： The present disclosure relates to a downhole tool that includes a first photon flux detector disposed at a first radial position about a longitudinal axis of the downhole tool that measures a first signal indicative of an x-ray flux of the x-ray photons. The downhole tool also includes a second photon flux detector disposed at a second radial position about the longitudinal axis of the downhole tool that measures a second signal indicative of the x-ray flux of the x-ray photons. Further, the downhole tool includes a controller communicatively coupled to the first photon flux detector and the second photon flux detector that determines a condition associated with the electron beam based at least in part on a relative x-ray flux from the first photon flux detector and the second photon flux detector.
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公开(公告)号：US20230144478A1
公开(公告)日：2023-05-11
申请号：US17982097
申请日：2022-11-07
发明人： Feyzi Inanc , Joseph Olaiya , Allan Jones , Peng Yuan , Toyli Anniyev
IPC分类号： G01V5/12 , E21B47/005
CPC分类号： G01V5/12 , E21B47/005
摘要： A method for identifying a defect within a cement layer of a multi string wellbore includes deploying a gamma scanner into the multistring wellbore, the gamma scanner including at least one source and at least one detector, the at least one source emitting radiation into the multistring wellbore and the at least one detector receiving backscatter radiation. The method also includes obtaining, from the gamma scanner, a count rate associated with at least one region of interest of the multistring wellbore. The method further includes identifying, based at least in part on data acquired from the gamma scanner, a background profile for the multistring wellbore. The method includes removing the background profile from the count rate. The method further includes identifying, within the at least one region of interest, a defect within the cement layer.
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公开(公告)号：US20230083045A1
公开(公告)日：2023-03-16
申请号：US17476684
申请日：2021-09-16
发明人： Sheng Zhan , Jeremy Zhang
摘要： A computer-implemented method that uses a preprogrammed neural network and a trained neural network computer program product to predict and then compared borehole and formation sigmas, when using a pulse neutron source and at least three dual-function radiation detectors. These dual-function radiation detectors are used for detecting both neutrons and gamma rays and further pre-programmed to distinguish between neutrons and gamma rays by using pulse shape discrimination techniques. The trained neural network computer program product can be used on above-surface systems, as well as below surface systems like borehole assemblies in logging-while-drilling systems. Once thermal neutron time-decay signals and capture gamma ray time-decay signals are measured by the at least three-dual function radiation detectors, a non-transitory computer readable memory device with the trained neural network computer program product is used to obtain a true borehole sigma and true formation sigma as the measurements are not affected by near-wellbore environments.
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10.发明申请公开(公告)号：US20230003916A1
公开(公告)日：2023-01-05
申请号：US17889993
申请日：2022-08-17
申请人： Philip Teague , Robert Sloan
发明人： Philip Teague , Robert Sloan
摘要： An x-ray based litho-density tool for measurement of simultaneous invaded and non-invaded formation surrounding a borehole is provided, the tool including at least an internal length comprising a sonde section, wherein sonde section further includes an x-ray source; at least one radiation measuring detector; at least one source monitoring detector; and a plurality of sonde-dependent electronics. In various embodiments, the tool uses x-rays to illuminate the formation surrounding a borehole, and a plurality of detectors are used to directly measure both invaded and non-invaded formation bulk densities. Detectors used to measure borehole standoff such that other detector responses may be compensated for tool standoff; long and ultra-long space detectors disposed in electromagnetic communication with a source located within a collimated tungsten radiation shield; and wear-pads disposed such that the source and detector assembly may be pressed against the side of the borehole to reduce borehole effects are also provided.
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