发明申请
- 专利标题: Adaptive equalization of downhole acoustic receivers
- 专利标题(中): 井下声学接收机的自适应均衡
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申请号: US11323674申请日: 2005-12-30
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公开(公告)号: US20070156359A1公开(公告)日: 2007-07-05
- 发明人: Georgios Varsamis , Joakim Blanch , Arthur Cheng , Calvin Kessler , Denis Schmitt , Batakrishna Mandal
- 申请人: Georgios Varsamis , Joakim Blanch , Arthur Cheng , Calvin Kessler , Denis Schmitt , Batakrishna Mandal
- 主分类号: G01R29/00
- IPC分类号: G01R29/00
摘要:
The present invention relates generally to a method and apparatus utilized in hydrocarbon exploration. More specifically, the present invention relates to the utilization of acoustic sources and receivers to determine acoustic properties of geologic formations as a logging tool traverses them, be it a wireline logging tool and/or a logging while drilling (LWD) tool. More particularly, the present invention is directed to methods of, and apparatus for, adaptive equalization of receivers to reduce and/or substantially eliminate sensitivity mismatch. A method is provided, the method comprising detecting arrival times of a first wave at each of a plurality of receivers, determining a first place in a well when the arrival times of the first wave are substantially the same at each of the plurality of receivers, and estimating effective receiver sensitivities and equalization factors for each of the plurality of receivers using a Stoneley wave amplitude received by the plurality of receivers at the first place in the well. The method also comprises correcting amplitudes of a second wave received by the plurality of receivers using the estimated effective receiver sensitivities and equalization factors for each of the plurality of receivers.
公开/授权文献
- US07392135B2 Adaptive equalization of downhole acoustic receivers 公开/授权日:2008-06-24
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