石油地球物理勘探2023，Vol.58Issue(6)：1522-1534,13.DOI:10.13810/j.cnki.issn.1000-7210.2023.06.024
多方法多信息电磁联合约束反演方法研究进展
Progress on joint inversion of electromagnetic constraints combined with multiple methods and multiple information
摘要
Abstract
Electromagnetic exploration plays an important role in oil and gas exploration,deep mineral resources sur-vey,geothermal groundwater exploration,imaging of deep earth structures,and underwater military target reconnais-sance.This paper systematically summarizes the research progress on joint inversion of electromagnetic constraints combined with multiple methods and information,introduces the research status from the perspective of method ap-plication,and focuses on the construction form,existing problems,and technical difficulties of the objective function for different inversion methods.In areas with more known information such as seismic data,different types of con-straint functions are constructed by utilizing priori information to improve the tectonic imaging accuracy in saline and igneous rock development areas and reduce the inversion non uniqueness.In areas where the magnetotelluric(MT)and controlled source electromagnetic(CSEM)data have been collected,the two methods can be employed to carry out joint inversion with their respective advantages.Various forms such as joint inversion with sequential constraints and joint inversion based on a unified objective function are developed.Additionally,CSEM and MT make up for each other in-depth inversion to improve the target inversion accuracy and reduce non uniqueness.This paper dis-cusses the selection of objective functions and weighting factors for this type of joint inversion.According to actual ap-plication effects,the most important and potential joint inversion is the inversion of electromagnetic and seismic data.Joint inversion has gone through from seismic constrained electromagnetic inversion to physical model based and cross-gradient method based joint inversion.This paper also analyzes the difficulty in constructing a reasonable con-nection between velocity and resistivity models and explains that the weighting factor setting of velocity and resis-tivity models in the objective functions is still the key and difficult points.Finally,this paper proposes to combine electromagnetic joint inversion,artificial intelligence algorithms,and three-dimensional visualization analysis.It also points out that large-scale parallel computation and other new methods and technologies can be adopted in the future,and joint acquisition systems can be developed to provide more effective data volumes for the multi-physical field joint inversion.关键词
电磁法勘探/多方法多信息联合反演/目标函数Key words
electromagnetic exploration/joint inversion of multiple methods and multiple information/objective func-tion分类
天文与地球科学引用本文复制引用
张朔宁,喻国,何展翔..多方法多信息电磁联合约束反演方法研究进展[J].石油地球物理勘探,2023,58(6):1522-1534,13.基金项目
本项研究受深圳市深远海油气勘探技术重点实验室(ZDSYS20190902093007855)、广东省地球物理高精度成像技术重点实验室(2022B1212010002)、深圳市科技计划项目"深海深地资源探测技术系统研发"(KQTD20170810111725321)及国家自然科学基金项目"深地/深海探测中强电流激发下可控源电磁法激电效应机理研究及应用"(41874085)联合资助. （ZDSYS20190902093007855）
