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1.发明授权公开(公告)号：US11181656B2
公开(公告)日：2021-11-23
申请号：US15838746
申请日：2017-12-12
发明人： Denis Syresin , Hiroshi Akima , Takashi Katagiri , Atsushi Oshima
摘要： A system may obtain orthogonal pairs of acoustic waveforms obtained by a rotating downhole acoustic tool. The downhole tool may include an acoustic transmitter and an acoustic receiver. A computing device communicatively coupled to the downhole tool that instructs the transmitter to generate the various waveforms detected by the acoustic receiver and store the various waveforms in a buffer. Each waveform of a subset of the various waveforms oriented in a similar direction may be stacked to generate a composite waveform with reduced noise. The computing system may determine an orthogonal pair of waveforms based on the composite waveform and remaining waveforms.
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公开(公告)号：US10859726B2
公开(公告)日：2020-12-08
申请号：US15555147
申请日：2016-03-03
发明人： Atsushi Oshima , Nicholas Andrew Robinson , Naoki Sakiyama , Hiroshi Nakajima , Hiroaki Yamamoto , Takeshi Endo , Henri-Pierre Valero
摘要： A downhole acoustic tool and method of use are provided. The acoustic tool includes an acoustic tool body. In addition, a transmitter section located along the acoustic tool body, including four or more transmitters to be driven so as to excite multi-mode waveforms. The acoustic tool further includes an array receiver section located along the acoustic tool body, containing a receiver sub-section comprising four or more receivers axially aligned with the four or more transmitters and spaced axially apart from the transmitter section. The acoustic tool also includes a processor configured to drive the transmitter section to excite multi-mode waveforms and to extract the multi-mode waveforms detected by the receiver section for interpretation of formation properties. A method for measuring a formation using the described acoustic tool is also provided.
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3.发明申请公开(公告)号：US20190179048A1
公开(公告)日：2019-06-13
申请号：US15838746
申请日：2017-12-12
发明人： Denis Syresin , Hiroshi Akima , Takashi Katagiri , Atsushi Oshima
摘要： A system may obtain orthogonal pairs of acoustic waveforms obtained by a rotating downhole acoustic tool. The downhole tool may include an acoustic transmitter and an acoustic receiver. A computing device communicatively coupled to the downhole tool that instructs the transmitter to generate the various waveforms detected by the acoustic receiver and store the various waveforms in a buffer. Each waveform of a subset of the various waveforms oriented in a similar direction may be stacked to generate a composite waveform with reduced noise. The computing system may determine an orthogonal pair of waveforms based on the composite waveform and remaining waveforms.
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公开(公告)号：US20180045844A1
公开(公告)日：2018-02-15
申请号：US15555147
申请日：2016-03-03
发明人： Atsushi Oshima , Nicholas Andrew Robinson , Naoki Sakiyama , Hiroshi Nakajima , Hiroaki Yamamoto , Takeshi Endo , Henri-Pierre Valero
CPC分类号： G01V1/50 , E21B47/0002 , E21B47/091 , G01V1/40 , G01V1/44 , G01V1/46 , G01V1/52
摘要： A downhole acoustic tool and method of use are provided. The acoustic tool includes an acoustic tool body. In addition, a transmitter section located along the acoustic tool body, including four or more transmitters to be driven so as to excite multi-mode waveforms. The acoustic tool further includes an array receiver section located along the acoustic tool body, containing a receiver sub-section comprising four or more receivers axially aligned with the four or more transmitters and spaced axially apart from the transmitter section. The acoustic tool also includes a processor configured to drive the transmitter section to excite multi-mode waveforms and to extract the multi-mode waveforms detected by the receiver section for interpretation of formation properties. A method for measuring a formation using the described acoustic tool is also provided.
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公开(公告)号：US10392934B2
公开(公告)日：2019-08-27
申请号：US15516428
申请日：2015-11-10
摘要： A technique facilitates slowness estimation in accordance with dispersion information in a sonic logging tool. The technique may be used for processing dispersive waveforms in real-time. In this embodiment, the technique utilizes a sonic transmitter and a sonic receiver array in the logging tool. The technique also includes use of a memory and a processor mounted in the logging tool, for converting dispersive waveforms into slowness of the formation and/or fluid in accordance with dispersion information stored in the memory. Additionally, the technique may utilize a telemetry system for sending the formation slowness data and/or quality control indicators to the surface.
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公开(公告)号：US20170248015A1
公开(公告)日：2017-08-31
申请号：US15516428
申请日：2015-11-10
摘要： A technique facilitates slowness estimation in accordance with dispersion information in a sonic logging tool. The technique may be used for processing dispersive waveforms in real-time. In this embodiment, the technique utilizes a sonic transmitter and a sonic receiver array in the logging tool. The technique also includes use of a memory and a processor mounted in the logging tool, for converting dispersive waveforms into slowness of the formation and/or fluid in accordance with dispersion information stored in the memory. Additionally, the technique may utilize a telemetry system for sending the formation slowness data and/or quality control indicators to the surface.
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