大剩余静校正量求解的多尺度反演方法研究  

Estimation of large residual statics by multiscale inversion algorithm

作　　者：井西利[1] 

机构地区：[1]燕山大学理学院,河北秦皇岛066004

出　　处：《石油地球物理勘探》2009年第5期564-568,共5页Oil Geophysical Prospecting

基　　金：国家自然科学基金(No.40374048)资助

摘　　要：文中针对大静校正量的剩余静校正问题,提出了基于模型道的剩余静校正方法。通过分析,找出了大静校正量使基于模型道的剩余静校正反演方法产生周波跳跃的原因,并指出在形成模型道的地震波频率上限与最大静校正量之积足够小的条件下,通过叠加形成的模型道是可靠的。据此建立了合理的基于模型道的多尺度剩余静校正方法,并进行了理论数据和实际资料的试算。试算结果表明,该方法可在一定程度上有效解决大静校正量的周波跳跃问题。该方法既具有非线性反演剩余静校正方法的计算效果,同时又具有线性反演方法的较高计算效率的特点。Regarding the residual static correction for large statics,the development of residual static correction technique which based on model trace was introduced in this paper.The related analysis was conducted and the reason for 'loop jump' which was caused by large residual statics to residual static correction inversion method which is based on model trace was found out.It is believed that if the product of the highest frequency of seismic wave and the largest residual statics is small,the model trace which is formed by stacking the traces in the CDP gather is reliable.In this paper the development of multiscale residual static correction technique which is based on model trace is introduced.Synthetic and real seismic data test show that the technique is effective and can solve 'loop jump' problem for large residual statics,the technique is not only as effective as non-linear inversion residual static correction techniques,but also as efficient as the linear inversion techniques.

关 键 词：静校正 反演 模型道 互相关 

分 类 号：P618.13[天文地球—矿床学] P631.4[天文地球—地质学]