典型地表条件下非一致性静校正影响分析

英文篇名：An Analysis of Inconsistent Statics Correction in Typical Surface Condition
中文刊名：工程地球物理学报
英文刊名：Chinese Journal of Engineering Geophysics
作者：唐进
英文作者：Tang Jin(China Oilfield Services Limited Geophysical Department ; Tanggu Tianjin 300451 ; China)
中文关键词：静校正 ; 地表一致性 ; 非地表一致性 ; 波动方程延拓
英文关键词：static correction ; surface consistency ; surface inconsistency ; wave equation continuation
出版日期：2013-05-30
机构：中海油油田服务股份有限公司物探事业部;
年：2013
期：03
出版单位：工程地球物理学报

摘要

静校正一直是地震资料处理中的一个关键环节。常规的静校正方法是基于地表一致性假设条件,但效果不明显,本文通过对水平层状介质下的理论静校正量的计算公式推导,分析了实际静校正量与近地表速度、厚度及反射界面深度和接收偏移距之间的关系。基于水平层状介质模型和基岩出露的典型山地模型,比较了理论静校正量和常规方法计算的静校正量之间的差异,阐述了进行非地表一致性静校正的必要性。通过对典型地区的实际资料采用地表一致性静校正方法和非地表一致性静校正方法进行处理后的叠加效果进行分析,结果表明采用非地表一致性静校正方法才能够更好地成像。
Static correction is a key link in seismic data processing.Conventional static correction method is based on the surface consistency hypothesis,but the effect is not obvious.Through deriving the theoretical calculation formula of static correction in horizontal layered medium,this papar analyzes the actual static correction relationship between the velocity of near surface,the depth,the reflection interface and the receiving offset.By using a horizontal layered medium model and a bedrock exposed typical mountainous model,we contrasted the static correction difference between the theoretical static correction and the conventional calculation method,and explained the necessity of surface inconsistency statics.Finally,after taking the method of surface-consistent static correction and surface inconsistent static correction to process the actual data of typical area,and analyzing the effect after stack,we found that the imaging of surface-consistent static correction is much better.

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