公开(公告)号：US20190179048A1

公开(公告)日：2019-06-13

申请号：US15838746

申请日：2017-12-12

申请人： Schlumberger Technology Corporation

发明人： Denis Syresin ,  Hiroshi Akima ,  Takashi Katagiri ,  Atsushi Oshima

IPC分类号： G01V1/46 ,  G01V1/50

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.

公开(公告)号：US11181656B2

公开(公告)日：2021-11-23

申请号：US15838746

申请日：2017-12-12

申请人： Schlumberger Technology Corporation

发明人： Denis Syresin ,  Hiroshi Akima ,  Takashi Katagiri ,  Atsushi Oshima

IPC分类号： G01V1/46 ,  G01V1/50

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.