提高最大能量法剩余静校正中模型道精度的方法  

Model trace improvement in residual static corrections

作　　者：吴波[1] 潘树林[2] 王荐[1] 

机构地区：[1]中国石化西南油气分公司勘探开发研究院,四川成都610041 [2]西南石油大学资源与环境学院,四川成都610500

出　　处：《石油地球物理勘探》2017年第6期1146-1149,1183,共5页Oil Geophysical Prospecting

基　　金：国家重大专项"四川山前带潮坪相白云岩储层地震预测应用研究"(2017ZX05005004-010)资助

摘　　要：针对常规最大能量法剩余静校正中模型道精度低的问题,提出提高模型道精度的方法。使用子波畸变道预处理技术消除子波畸变严重的地震道对模型道的影响,提高模型道精度;使用自适应分权叠加算法,削弱子波与模型道相似程度较弱的地震道能量,进一步加强有效信号对模型道叠加的影响。实际资料的处理结果验证了本文方法能够进一步提高复杂地区低信噪比资料的静校正精度。In the conventional maximum stack-power method for residual static corrections,the model trace usually is inaccurate.To solve this problem we propose in this paper a model trace improvement method.In the preprocessing stage,traces with serious wavelet distortion are eliminated to avoid influences on the model trace.On the other hand,the adaptive decentralized superposition algorithm is adopted to weaken influences of wavelet less-similarity traces on the model trace,and further strengthen the influence of efficient signals on model stack.Applications to seismic data prove that the proposed method can effectively improve residual static corrections of low signal-to-noise ratio data in complicated mountainous areas.

关 键 词：最大能量法 子波畸变 模型道 预处理 自适应分权叠加 

分 类 号：P631[天文地球—地质矿产勘探]