基于模型道的转换波时变静校正  

Converted-wave time-variant static correction based on model trace

作　　者：孟星浑 代爽玲 杨震[1] 芦俊[1] 

机构地区：[1]中国地质大学(北京)能源学院,海相储层演化与油气富集机理教育部重点实验室,北京100083

出　　处：《地球物理学进展》2016年第2期748-753,共6页Progress in Geophysics

基　　金：国家高技术研究发展计划(863)"多分量地震裂缝检测与油气识别技术"(2013AA064201);中央高校基本科研业务费专项资金(2-9-2013-093);国家自然科学基金项目(41425017;41574126)联合资助

摘　　要：由于转换横波传播路径的非对称性,使得转换横波的静校正与纵波有很大的不同.目前大多数静校正方法都是基于地表一致性假设提出的,而抽取转换波CCP道集的方法通常会使炮检关系破碎,同一道中不同时间的转换波数据对应不同的炮点与接收点位置.为此,提出了一种基于模型道的时变静校正方法.该方法以模型道波峰为基准将道集分为不同的时窗,各时窗中各采样点按一定准则分别进行时移校正.最后,给出了该方法在模型数据以及和顺二维三分量转换横波静校正处理中的应用效果,表明时变静校正在解决转换波静校正时具有一定的技术优势,提高了地震资料的信噪比,取得了较好的效果.Converted P-SV wave processing is very different from the traditional p-wave. It must bring the corresponding problems with static correction methods which suit the p-wave. At present most of the static correction methods are based on the surface consistent hypothesis. But the methods of imaging the converted wave gathers always break the relationship between source and receiver. The data of converted wave means a different shot and receiver position at different time in the same trace. To this end,this paper proposes a time-variant static correction method based on the model trace. With the method,the trace gather can be divided into different time window according to the wave peak of model trace,each sampling points of different window is corrected respectively according to certain criteria. Finally,gives the application results of model data and He Sun area where the near surface structure is complex. It turns out that the method in solving the non-surface consistent static correction has certain advantages,improve the signal-to-noise ratio of seismic data and achieve better results.

关 键 词：模型道 静校正 转换横波 非地表一致性 

分 类 号：P631[天文地球—地质矿产勘探]