初至波剩余静校正技术在南安集海地区的应用  

First-break residual static corrections applied in the southern part of Anjihai area

作　　者：潘龙 刘宜文 郑鸿明 赵勇 郭琪 PAN Long;LIU Yiwen;ZHENG Hongming;ZHAO Yong;GUO Qi(Geophysical Departm ent, Research Institute of Explorationand Development, Xinjiang Oilfield Company,PetroChina, Urumqi, Xinjiang 830013, China)

机构地区：[1]中国石油新疆油田勘探开发研究院地球物理研究所,新疆乌鲁木齐830013

出　　处：《石油地球物理勘探》2019年第2期274-279,I0006,共7页Oil Geophysical Prospecting

基　　金：中国石油天然气股份公司"新疆大庆"重大科技专项(2012E-34-01)资助

摘　　要：准噶尔盆地南缘山前南安集海探区表层结构复杂,常规的基准面静校正技术难以有效解决严重的基准面静校正问题,导致基于相关的自动反射波剩余静校正方法受地震记录信噪比低和最大1/2波形周期静校正量的限制而不能很好地解决复杂近地表的剩余静校正问题。初至波剩余静校正方法由高信噪比初至时差统计求解炮检点的剩余静校正量,不需依赖表层模型、较高信噪比资料等,对校正量的大小也无限制,侧重补充基准面静校正量的中、高频分量。通过应用和进一步研究,明晰了模型曲线和差分两种初至波剩余静校正技术的应用假设前提及综合应用思路,并在南安集海探区获得了良好的应用效果。In the southern of Anjiha,mountain front of Junggar Basin southern margin,it is usually very difficult to solve serious field statics problem with conventional datum correction methods due to complex near-surface structures.As a result,residual static corrections cannot be well achieved due to seismic data low signal-tonoise ratio(SNR).To solve the problem we propose first-break residual statics method,which uses statistics of high-SNR data first breaks to calculate residual statics of shotpoints or receivers.This method does not depend on surface models,and has not the limit of statics.We discuss also in the paper favorable conditions for application of 2 residual static corrections:modelcurve method and difference method.They achieve good results in the southern of Anjihai area.

关 键 词：静校正 初至时间 剩余静校正 差分法 模型 

分 类 号：P631[天文地球—地质矿产勘探]