川东南复杂山地灰岩区静校正技术综合应用研究  

Study on comprehensive application of static correction technology in complex mountainous limestone area of Southeast Sichuan

作　　者：邹少峰 王豆豆 马江林 余青露 朱童 ZOU ShaoFeng;WANG DouDou;MA JiangLin;YU QingLu;ZHU Tong(Sinopec Geophysical Research Institute Co.,Ltd.,Nanjing 211103,China)

机构地区：[1]中石化石油物探技术研究院有限公司,南京211103

出　　处：《地球物理学进展》2023年第2期768-778,共11页Progress in Geophysics

基　　金：国家自然科学基金项目(U19B6003)资助。

摘　　要：复杂山地灰岩出露区勘探存在严重的静校正问题,解决静校正问题难度较大,由于静校正问题的存在会降低地震资料的垂向分辨率、出现假构造、影响速度分析,严重影响地震资料成像质量,降低勘探成功率.为解决复杂山地灰岩区勘探存在的静校正问题,本文研究了高程静校正、折射静校正和初至层析静校正,分析对比不同方法的优缺点和应用效果,在此基础上提出并研究融合静校正技术,在本研究区中,该方法是采用折射静校正和初至层析静校正量的优势区域进行融合,充分发挥不同方法的优点和适应性,较好的解决一次静校正;针对剩余静校正问题,提出了基于反射波剩余静校正、成像域射线束剩余静校正和速度建模的循环迭代综合剩余静校正处理技术,分步逐级迭代解决剩余静校正问题,该方法集成了反射波剩余静校正、成像域射线束剩余静校正的优点,明显提高地震剖面的细节成像质量.通过本文研究,建立了一套针对复杂山地灰岩区低信噪比资料的静校正处理技术序列并形成一套处理流程,在川东南复杂山地灰岩区低信噪比数据处理中,验证了该技术序列的可行性,取得比较好的效果.There is a serious static correction problem in the exploration of complex mountain limestone outcrop area,and it is difficult to solve the static correction problem.The existence of static correction problems will reduce the vertical resolution of seismic data,false structure,influence velocity analysis,seriously affect the imaging quality of seismic data and reduce the success rate of exploration.In order to solve the static correction problems existing in the exploration of complex mountainous limestone areas,this paper studies the elevation static correction,refraction static correction and first break tomographic static correction,analyzes and compares the advantages,disadvantages and application effects of different methods,and on this basis proposes and studies the fusion static correction technology.In this study area,this method uses the advantages of refraction static correction and first break tomographic static correction to fuse,and gives full play to the advantages and adaptability of different methods,so as to better solve the first static correction.In view of the residual static correction problem,the cyclic iterative comprehensive residual static correction processing technology based on reflected wave residual static correction,ray beam residual static correction in imaging domain and velocity modeling is proposed.The residual static correction problem is solved step by step iteratively.This method integrates the advantages of reflected wave residual static correction and ray beam residual static correction in imaging domain,and greatly improves the detailed imaging quality of seismic profile.Through this study,a set of static correction processing technology sequence for low signal-to-noise ratio data in complex mountain limestone area is established and a set of processing flow is formed.In the low signal-tonoise ratio data processing of complex mountain limestone area in southeast Sichuan,the feasibility of the technology sequence is verified,and good results are obtained.

关 键 词：静校正 复杂地表 融合静校正 综合剩余静校正 

分 类 号：P631[天文地球—地质矿产勘探]