大地电磁、地震与重力资料综合反演在徐闻地区的应用  

Application of joint inversion of magnetotelluric, seismic and gravity data in Xuwen area.

作　　者：陈永杰[1] 于鹏[2] 

机构地区：[1]中国石化江苏油田分公司地质科学研究院,江苏扬州225009 [2]同济大学海洋地质国家重点实验室,上海200092

出　　处：《勘探地球物理进展》2005年第4期271-275,共5页Progress in Exploration Geophysics

基　　金：国家高技术研究发展计划"中国近海前新生代残留盆地油气勘探技术研究"(2004AA615010)国家自然科学基金资助项目(40104005)。

摘　　要：在对联合反演和模拟退火算法研究基础上,利用大地电磁(MT)与地震资料的模拟退火约束同步反演技术,对雷州半岛徐闻地区的MT资料和地震数据进行了处理。研究区第三系玄武岩发育,地震勘探难度大,资料品质受到一定影响,因此利用MT资料并结合重力等资料,通过联合反演来解决深部目的层的分布及基本构造特征,为加快油气勘探及部署提供依据。在物性研究基础上,建立了该区基本的物理-地质模型,通过大地电磁与地震资料的模拟退火约束同步反演,并结合重力资料进行了顺序反演和综合解释,确定了该区的速度、电性、密度结构,为构造研究提供了全面和可靠的依据,证明了联合反演的必要性和有效性。Based on the studies of simulated annealing algorithm and joint inversion methods, the magnetotelluric (MT) and seismic data from Xuwen area, Leizhou peninsula were processed using simulated annealing algorithm constrained joint inversion of magneto-telluric and seismic data. The studied area was difficult for seismic prospecting and the reflection quality was not quite well as a result of the Tertiary basalt. The joint inversion was carried out on MT data , seismic data and gravity data as well to solve the distribution of deep target strata and basic structural features. Basic physical-geological models of the studied area were set up in accordance with physical property study. With the combination of simulated annealing algorithm constrained synchronous joint inversion of MT and seismic data, sequential joint inversion using gravity data and integrated interpretation, velocity, electrical and density structures of the area were determined, which provided reliable bases for geological structure studies. The application of joint inversion using different geophysical data was proved necessary and effective in this area.

关 键 词：大地电磁测深(MT) 地震 重力 模拟退火 联合反演 雷州半岛(徐闻地区) 

分 类 号：P631.443[天文地球—地质矿产勘探]