摘要
网格层析反演技术是当前深度域建模的主要方法,但其通常只能获得平滑的速度结构,因此其对于碳酸盐岩,火成岩,复杂断块区域,网格层析反演技术网格层析方法无法精确描述该区域的速度突变特征。本文基于预条件正则化理论,实现了基于断层和层位约束的网格层析成像,其可在网格层析速度反演时,使其速度更新平滑不跨越速度突变界面的位置。模型和实际数据反演效果表明,该方法可以显著提高速度反演精度,保持速度突变位置两侧的速度真实变化,有效解决了常规层析成像技术对速度突变位置处速度刻画不精确的问题。
Grid tomography inversion technique is the main method of current depth domain modeling,but it usually only obtains a smooth velocity structure.Igneous rock,complex fault block region,grid tomography inversion method cannot accurately describe the velocity mutation characteristics of this region.Based on the precondition regularization theory,this authors implements grid tomography imaging based on fault and horizon constraints,which can smooth the velocity update without crossing the velocity mutation interface when the grid tomographic velocity is inverted.The model and actual data inversion results show that the method can significantly improve the velocity inversion accuracy and maintain the true velocity change on both sides of the sudden position of the velocity,which effectively solves the problem that the conventional tomography technique does not accurately describe the velocity at the sudden position of the velocity.
作者
王新领
张健男
赵明
赵波
WANG Xin-Ling;ZHANG Jian-Nan;ZHAO Ming;ZHAO Bo(China Marine Geophysical Prospecting Business Department,Zhanjiang,524057,China;College of Marine Geo-Sciences,Ocean University of China,Qingdao 266100,China;Key Lab of Submarine Geosciences and Prospecting Techniques,Ministry of Education,Qingdao 266100,China)
出处
《中国海洋大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第6期79-85,共7页
Periodical of Ocean University of China
基金
国家自然科学基金项目(41574105
41674114)
国家重大科技专项(2016ZX05027-002)
青岛海洋科学与技术国家实验室鳌山科技创新计划项目(2016ASKJ13)资助~~
关键词
层析反演
断层约束
速度建模
正则化
tomography inversion
fault constraint
velocity modeling
regularization
