静校正对波动方程叠前深度偏移成像效果的影响  

Static corrections influence on wave equation prestack depth migration

作　　者：王东 李文卉 熊登 章晓 武威 吴晓丰 

机构地区：[1]东方地球物理公司物探技术研究中心北京分中心,北京100088 [2]东方地球物理公司物探技术研究中心,河北涿州072751

出　　处：《石油地球物理勘探》2017年第A02期76-80,共5页Oil Geophysical Prospecting

摘　　要：波动方程叠前深度偏移是目前解决复杂构造地震成像的最有效手段。然而在复杂地区的实际应用中,波动方程成像方法却没能较充分发挥出这一优势,其原因主要是由于未能较好地解决近地表引起的静校正问题。本文通过对理论模型数据的处理与分析,讨论了静校正处理中近地表模型精度、高速顶拾取以及替换速度对波动方程叠前深度偏移成像质量的影响。At present,the wave-equation prestack depth migration is one of the most effective methods for seismic imaging of complex geological structures,and has been extensively used in the industry.However,in the practice,the wave-equation imaging does not always show its superiority in those tough situations.The main reason is undeterminable solutions of the static corrections caused by complex near-surface problems.In this paper,based on the processing and analyzing of a theoretical model,we illustrate the influence of near-surface velocity model precision,high-velocity crest picking,and conversional replacement velocities on the wave-equation prestack depth imaging.

关 键 词：波动方程叠前深度偏移 静校正 高速顶 替换速度 

分 类 号：P631[天文地球—地质矿产勘探]