发明名称 |
Dempning av multipler i 3-D data |
摘要 |
A computationally economical method for applying multi-dimensional multiple-reflection attenuation to a marine seismic-signal data set comprised of a plurality of common shot gathers that have surface-multiple wavefields embedded therein. The multi-dimensional data are assumed to have been gathered from a plurality of parallel 2-D lines of survey. From every nth reference line, where n is a small number greater than 2, a common shot gather is selected. For every so-selected common shot gather, a reference surface-multiple wavefield is predicted as a function of offset and travel time with the aid of any well-known multiple attenuation routine, using a wavelet having fixed attributes in terms of amplitude, phase and frequency. A common shot gather is chosen from among the plurality of common shot gathers. The predicted surface-multiple wavefield nearest to the chosen common shot gather is adaptively filtered to match the predicted surface-multiple wavefield to the surface-multiple wavefield embedded in the chosen common shot gather. The matched predicted surface multiple wavefield is subtracted from the embedded surface multiple wavefield to provide a multiple-free common shot gather. |
申请公布号 |
NO975009(A) |
申请公布日期 |
1998.05.19 |
申请号 |
NO19970005009 |
申请日期 |
1997.10.31 |
申请人 |
WESTERN ATLAS INTERNATIONAL INC |
发明人 |
DRAGOSET JR., WILLIAM HENRY;WARD, LOUIS JOSEPH |
分类号 |
G01V1/36;(IPC1-7):G01V1/36 |
主分类号 |
G01V1/36 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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