发明公开
- 专利标题: AN IMPROVED METHOD FOR REVERBERATION SUPPRESSION.
- 专利标题(中): 改进方法减少混响。
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申请号: EP94923411申请日: 1994-07-13
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公开(公告)号: EP0666992A4公开(公告)日: 1998-04-29
- 发明人: DRAGOSET WILLIAM H JR
- 申请人: WESTERN ATLAS INT INC
- 专利权人: WESTERN ATLAS INT INC
- 当前专利权人: WESTERN ATLAS INT INC
- 优先权: US10194993 1993-08-04
- 主分类号: G01V1/28
- IPC分类号: G01V1/28 ; G01P3/42 ; G01S7/527 ; G01S7/536 ; G01V1/36 ; G01V1/38 ; G06F17/00 ; G10K11/178
摘要:
A method for reducing the effects of reverberation on noisy seismic wavefields recorded from within a moisture-laden environment. The wavefield manifests itself as a pressure signature and a velocity signature that contains an embedded noise signature. The pressure signature is adaptively filtered and subtractively combined with the velocity signature to isolate a nearly pure noise signature. The nearly pure noise signature is added back to the original velocity signature with opposite sign to clear away the embedded noise, leaving a refined velocity signature. The refined velocity signature iteratively is scaled and summed with the pressure signature, incrementing the scale factor at each iteration and autocorrelating the sum. A coefficient of convergence is calculated after each summation. The coefficient of convergence that most closely approaches unity identifies the preferred scale factor.
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