论文部分内容阅读
王成祥 ,赵波 ,张关泉 .基于起伏地表的混合法叠前深度偏移 .石油地球物理勘探 ,2 0 0 2 ,37(3) :2 19～ 2 2 3对于起伏地表条件下的叠前深度偏移 ,克希霍夫积分法可以灵活地处理起伏的地表条件 ,但是对于复杂构造成像的精度较低 ;而波动方程混合法偏移对复杂构造的成像精度很高 ,但是不易处理起伏的地表条件。本文实现了起伏地表条件下的波动方程混合法叠前深度偏移 ,从而达到既能使复杂构造精确成像 ,又能处理任意起伏地表的目的。从起伏地表开始的叠前深度偏移 ,将地表的高程校正隐含在了偏移本身的过程中 ,且比常规的高程校正更精确 ,因为常规的高程校正仅仅是垂向的静态时移 ,忽略了水平分量 ,而偏移过程中的高程校正则是按照波的实际传播路径来校正的。
WANG Cheng-Xiang, ZHAO Bo, ZHANG Guan-Quan.Precipitation Depth Migration Based on Rough Surface Mixed Method.Petroleum Geophysical Prospecting, 2 0 0 2, 37 (3): 2 19 ~ 2 2 3 For prestack depth deviation The Kirchhoff integral method can flexibly deal with undulating surface conditions, but the accuracy of complex structure imaging is low. However, the wave equation hybrid method has high imaging accuracy for complex structures, but it is not easy to deal with undulating surface conditions . In this paper, the prestack depth migration by the wave equation hybrid method under fluctuating surface conditions is realized, so as to achieve the purpose of accurately imaging complex structures and processing arbitrary surface waves. Prestack depth migration from undulating surface implicitly implies elevation correction on the surface within the offset itself and is more accurate than conventional elevation correction because conventional elevation correction is only vertical static time-shift, Ignoring the horizontal component, the elevation correction during the offset is corrected according to the actual propagation path of the wave.