三维一步法全倾角偏移
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摘要
本文采用时间层分裂法实现三维一步法全倾角波动方程有限差分偏移。该方法对速度和构造走向及倾角都无特殊限制。文中阐述了差分方程理论及实现方法，并对山区三维、煤田三维以及海陆交互区三维地需数据进行了处理。结果表明，本方法的偏移成像剖面比两步法偏移成像剖面分辨率高、界面归位合理、断点清楚，取得了明显的效果。
One-pass all-dip 3D migrati0n using finite difference of wave equation can be achieved through time horizon splitting. No special limitation of velocity,structural trend and dip is needed in the technique. The paper details theory of difference equation and performance of the technique. The technique has been used to process the 3-D seismic data from hilly area,coal field and beach. It is shown that the migrated section produced by this technique has higher resolution,more reasonable interface position and clearer fault points than two-pass migrated section,resulting in satisfactory effect.
One-pass all-dip 3D migrati0n using finite difference of wave equation can be achieved through time horizon splitting. No special limitation of velocity,structural trend and dip is needed in the technique. The paper details theory of difference equation and performance of the technique. The technique has been used to process the 3-D seismic data from hilly area,coal field and beach. It is shown that the migrated section produced by this technique has higher resolution,more reasonable interface position and clearer fault points than two-pass migrated section,resulting in satisfactory effect.
引文
1王振华.三维波动方程P-R分裂偏移.石油地球物理勘探,1990,25(4):379～397
2王振华.方向导数法三维P-R分裂偏移.石油地球物理勘探,1992,27(2):174～181
3严昌言.三维分裂法与两步法偏移.物探科技通报,1985,3(2):48～56
4马在田.三维地震波动方程偏移.石油物探,1978,17(1):11～26
5程东峰,何樵登.三维偏移分裂算法.石油物探,1982,21(1):11～17
6马在田.三维一步法全倾角偏移.第四次南方物探技术讨论会论文集,1992
7马在田.地震成像技术,石油工业出版社,1989
8马在田,孙建国.论常炮检距地震剖面叠前偏移方法.石油地球物理勘探,1990,25(2):127～136
2王振华.方向导数法三维P-R分裂偏移.石油地球物理勘探,1992,27(2):174～181
3严昌言.三维分裂法与两步法偏移.物探科技通报,1985,3(2):48～56
4马在田.三维地震波动方程偏移.石油物探,1978,17(1):11～26
5程东峰,何樵登.三维偏移分裂算法.石油物探,1982,21(1):11～17
6马在田.三维一步法全倾角偏移.第四次南方物探技术讨论会论文集,1992
7马在田.地震成像技术,石油工业出版社,1989
8马在田,孙建国.论常炮检距地震剖面叠前偏移方法.石油地球物理勘探,1990,25(2):127～136
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