重震联合中速度-密度耦合研究综述

基于物性参数耦合的多地球物理数据联合反演方法是21世纪初发展起来的新技术,速度-密度耦合约束下的重震联合反演是其重要分支之一.相比于传统的重震资料综合解释,基于速度-密度耦合的重震联合反演能够减少主观因素的干扰,发挥地震和重力数据的互补作用,产生精度和一致性更高的速度-密度模型.结合国内外现状,本文较为全面地介绍了现有的速度-密度耦合方式,并讨论了速度-密度耦合约束下重震联合反演策略和目标函数的构建及求解等相关问题.不同反演策略和耦合方式的适用性不同,没有绝对的优劣之分.根据研究区的实际情况,在合适的速度-密度耦合约束下开展重震联合反演研究和应用是下一步工作的重点.

Review of velocity-density coupling in joint inversion of seismic and gravity data

Joint inversion of multi-geophysical data based on the coupling of physical parameters is a new technology developed in the early 21st century.Gravity-seismic joint inversion under the constraint of velocity-density coupling is one of its important branches.Compared with the traditional comprehensive interpretation of seismic and gravity data,joint inversion based on velocity-density coupling can reduce the interference of subjective factors,play the complementary role of seismic and gravity data,and produce velocity-density models with higher precision and consistency.According to the status quo at home and abroad,this paper introduces the existing velocity-density coupling method comprehensively,and discusses the related problems of gravity-seismic joint inversion strategy and objective function with coupling constraint.The applicability of inversion strategies and coupling methods is different,and no specific one is superior to others.According to the real situation of study area,the application of gravity-seismic joint inversion under appropriate velocity-density coupling constraints is the focus of the next step.