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公开(公告)号：US11579325B2
公开(公告)日：2023-02-14
申请号：US16867053
申请日：2020-05-05
IPC分类号： G01V3/30 , E21B47/0228 , G01V3/08 , G01V3/12 , G01V3/34
摘要： A method for mapping underground sensors onto a network map may include obtaining a plurality of magnetic measurements from a plurality of sensors. The method may include using the plurality of magnetic measurements for determining a plurality of sensor locations in an initial network map. The method may include generating updated network maps from the perspective of each localized sensor. The method may include merging the updated network maps into a final network map, the final network map comprising a most accurate location for each sensor. The method may include determining inner localized sensors out of the plurality of sensors in the final network map. The method may include identifying the inner localized sensors as new base station anchors. The method may include mapping the inner localized sensors onto the final network map as new base station anchors.
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公开(公告)号：US11574459B2
公开(公告)日：2023-02-07
申请号：US16461923
申请日：2017-02-06
发明人： Hsu-Hsiang Wu , Rencheng Song , Li Pan
IPC分类号： G06V10/75 , E21B47/026 , G01V3/34 , G01V3/38 , G01V3/20
摘要： A pixelation-based approach to summarize downhole inversion results acquires inversion solutions and generates an initial model. Each layered solution is pixelated into pixels where each pixel contains the resistivity value of the initial model. A weighted function that weighs pixels according to their proximity to the logging tool may be used to generate the pixelated model to thereby improve accuracy. A statistical summary study is performed to identify the best pixelated model, which is then used to determine one or more formation characteristics.
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公开(公告)号：US20220381142A1
公开(公告)日：2022-12-01
申请号：US17333952
申请日：2021-05-28
发明人： Alexander DOWN , Ryan MCPHEE
摘要： A digitizing apparatus for transmitting electromagnetic telemetry signals to facilitate drilling operations comprises a local receiver and one or more remote transmitters. A method uses the remote transmitter to measure an electric potential between a pair of ground stakes that are positioned at some distance away from the local receiver. The local receiver is coupled to a surface receiver that is located at or near a drilling rig. The remote transmitter converts the electric potential into a digital signal and transmits the digital signal wirelessly to the local receiver. The local receiver then converts the digital signal into an analog signal that is provided to the surface receiver for processing. The remote transmitter and local receiver may comprise GPS clocks to synchronize the signals to maintain a constant phase shift.
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4.发明授权公开(公告)号：US11480706B2
公开(公告)日：2022-10-25
申请号：US16171141
申请日：2018-10-25
摘要： Methods, systems, devices, and products for taking multi-component induction tool measurements of a three-dimensional space from an interior of a plurality of nested tubulars in a borehole in an earth formation and estimating the property for each of the at least two tubulars using the multi-component induction tool measurements. The multicomponent induction tool measurements may be responsive to a property corresponding to at least two conductive tubulars of the plurality of nested tubular. Taking multi-component induction tool measurements may include taking three-dimensional low-frequency sinusoidal frequency domain waveform resistivity measurements and taking three-dimensional transient EM measurements with the multi-component induction tool.
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公开(公告)号：US11422283B1
公开(公告)日：2022-08-23
申请号：US17375955
申请日：2021-07-14
摘要： A nuclear magnetic resonance (NMR) tool for use in a subterranean region, the NMR tool comprising a magnet assembly to produce a magnetic field in a volume in the region, an antenna assembly to produce an excitation in the volume, and to receive NMR signals from the volume, and an acquisition system coupled to the antenna assembly and configured to acquire a first NMR signal using a first acquisition window having a first duration, and acquire a second NMR signal using a second acquisition window having a second duration, wherein the second duration is different than the first duration, and a processor coupled to the acquisition system and configured to determine a lateral displacement of the NMR tool as a function of time based on the first and second NMR signals, and apply the lateral displacement to the first NMR signal to generate NMR relaxation data with reduced motion effects.
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公开(公告)号：US11365624B2
公开(公告)日：2022-06-21
申请号：US17036015
申请日：2020-09-29
申请人： CHINA UNIVERSITY OF MINING AND TECHNOLOGY, BEIJING , WUHAN CHANGSHENG MINE SECURITY TECHNOLOGY LIMITED
发明人： Yifan Zeng , Qiang Wu , Chunsheng Liu , Lina Xing
摘要： Disclosed is a system and a method for monitoring water inrush, including: a host terminal, a field host, at least one controller and at least one electrode array. Each electrode array is placed in one borehole and to detect electric field signals of surrounding rocks around the borehole; each controller connects with one electrode array and is to control the electrode array to carry out a high-density induced polarization measurement on the surrounding rocks; the field host connects with the controller and is to send control signals to the controller, receive and process the electric field signals output by the electrode array; and the host terminal connects with the field host and is to receive the electric field signals processed by the field host, determine changes on apparent resistivity and apparent chargeability of the surrounding rocks, and determine whether there exists water inrush according to the changes.
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公开(公告)号：US11346974B2
公开(公告)日：2022-05-31
申请号：US17275287
申请日：2019-09-11
摘要： The present disclosure relates to a method that includes generating a first pulse at a first position along a geological formation with a plurality of antennae, wherein the first pulse comprises a Can-Purcell-Meiboom-Gill (CPMG) sequence, and wherein each antenna of the plurality of antennae is configured to generate NMR data via transmitting and receiving pulses into the geological formation.
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公开(公告)号：US11243326B2
公开(公告)日：2022-02-08
申请号：US16325306
申请日：2016-11-04
发明人： Yao Ge , Wei Li , Jing Jin , Chung Chang
IPC分类号： G06F11/30 , G01V3/38 , G01V3/34 , G01V3/26 , G01R33/12 , G01V1/50 , E21B47/002 , E21B47/26 , E21B47/085 , G01V1/48 , G01V1/46
摘要： Acoustic imaging tools and methods use refracted wave amplitudes to generate borehole images, thereby providing a method and tool that is highly sensitive to borehole discontinuities.
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公开(公告)号：US20210373189A1
公开(公告)日：2021-12-02
申请号：US17174645
申请日：2021-02-12
发明人： Daniel Palmer , James Rector , Michael Wilt
摘要： In addition to drilling operations a hard rock drill rig is used to induce seismic energy into subsurface rock formations. In quartz rich rock the seismic energy will partially convert to electrical energy thereby allowing for the prospecting of ore-bearing quartz veins. Seismic energy and electric energy are detected by a sensor array. The electric energy is used to infer the presence of piezoelectric materials in the rock formations, and such materials are mapped using the detected seismic energy and electric energy.
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10.发明申请公开(公告)号：US20210340853A1
公开(公告)日：2021-11-04
申请号：US16477484
申请日：2018-08-22
发明人： Jin Ma , Michael S Bittar , Hsu-Hsiang Wu
摘要： One or more first formation measurements sensitive to around a sensor string of a drill string deployed in a subsurface formation is received, A 1-D inversion of the first formation measurements is performed at a first reference point. One or more second formation measurements sensitive to ahead of a drill bit of the drill string deployed in the subsurface formation is received. A 1-D inversion of the second formation measurements is performed at a second reference point ahead of the drill bit of the sensor string to determine formation properties ahead of the drill bit, wherein the 1-D inversion of the second formation measurements is based on inversion results associated with the 1-D inversion of the first formation measurements.
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