| 转换P-SV波叠前偏移 |
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| 引用本文： | 罗省贤,贺振华.转换P-SV波叠前偏移[J].石油地球物理勘探,1991(4). |
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| 作者姓名： | 罗省贤 贺振华 |
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| 作者单位： | 成都地质学院物探系计算中心，成都地质学院物探系计算中心 |
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| 摘 要： | 转换P-SV波的入射波与反射波传播速度不同,射线路径也不对称,反射点偏离共中心点,其时距曲线不再是双曲线,所以,不能用P-P波常规水平叠加方法和叠后偏移方法进行处理。即使采用计算转换点等特殊处理技术,也会带来较大的误差。本文采用声学方程及相移法对P-SV波进行叠前偏移,可以高效率地处理转换波的运动学问题,而且能保证成像精度。所以,此法能同时解决P-SV波叠加和偏移两方面的问题。
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| 关 键 词： | P-SV波 叠前偏移 波场延拓 互相关 |
Prestack migration of converted P-SV wave, |
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| Luo Xingxian and He Zhenhua Chengdu Geology College,Chengdu City,Sichuan Province,China,Internal Postcode:.Prestack migration of converted P-SV wave,[J].Oil Geophysical Prospecting,1991(4). |
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| Authors: | Luo Xingxian and He Zhenhua Chengdu Geology College Chengdu City Sichuan Province China Internal Postcode: |
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| Affiliation: | Luo Xingxian and He Zhenhua Chengdu Geology College,Chengdu City,Sichuan Province,China,Internal Postcode: 610059 |
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| Abstract: | The incident velocity of P-SV wave is different from its reflection velocity, its ray path is so asymmetrical that the reflection point deviates from the common mid point, and its time-distance curve is not hyperbolic. As a result, P-SV wave can not be processed by using the conventional horizontal stack and poststack migration methods which are applicable to P-P wave.Even though the special technique for calculating the conversion point is used, quite big error will appear. The application of acoustic equation and phase-shift method to the prestack migration of P-SV wave can effectively resolve its kinematic problem and guarantee its image accuracy. So this method can solve the problems in stack and migration of P-SV wave. |
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| Keywords: | P-SV wave prestack migration wave field continuation crosscorrelation |
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