深水崎岖海底地震数据成像方法与应用  

Seismic imaging under the irregular deep water bottom

作　　者：常旭[1] 刘伊克[1] 杜向东 李绪宣 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029 [2]中海石油研究中心,北京100027

出　　处：《地球物理学报》2008年第1期228-234,共7页Chinese Journal of Geophysics

基　　金：中国科学院知识创新工程重要方向项目(KZCX2-YW-203);国家自然科学基金项目(40774068)资助

摘　　要：本文针对深水崎岖海底地震数据深部成像困难的问题,讨论了波动方程叠前深度域保幅偏移的基本理论,利用数值模型验证了波动方程叠前深度域保幅偏移算法的保持振幅特性,给出了该方法与非保幅偏移方法对于复杂构造成像精度的对比,证明了保幅偏移方法可以提高复杂构造的成像精度.本文还将波动方程叠前深度域保幅偏移算法应用到实际资料的处理中,处理结果表明该方法能够有效消除崎岖海底对深部地层的影响.This research aims at attacking the difficulty to image with the seismic data from the irregular deep water bottom. The basic theory of the true amplitude common-shot prestack wave equation migration is discussed. Numerical experiments demonstrate the robustness of amplitude preserving characteristics with true amplitude prestack wave equation migration. This method can increase the resolution of imaging in complex media, in contrast to non-true amplitude migration, demonstrating its effectiveness. Using real data from a seismic exploration, the method is tested with an attempt to handle the difficulty of making images in the irregular deep water bottom, and it is proved that the true amplitude migration can remove the imaging artifacts caused by irregular deep water bottom.

关 键 词：波动方程 保幅偏移 复杂构造 崎岖海底 

分 类 号：P631[天文地球—地质矿产勘探]