综合地球物理方法在环渤海残留盆地分布研究中的应用

Application of comprehensive geophysical methods in the research of the pre-Cenozoic residual basins in circum-Bohai Bay region

郝天珧 吴健生 徐亚 王家林 宋海斌 黄松 王真理

Hao Tianyao Wu Jiansheng Xu Ya Wang Jialin Song Haibin Huang Song Wang Zhenli

采用以重、磁数据为主体,以大地电磁测深(MT)和浅部地震等高精度数据为约束,以正、反演技术为途径的综合地球物理研究方法,剥离新生界及深部地质体的影响,圈划出环渤海地区残留盆地的宏观分布,给出残余厚度的分布特征。环渤海地区残留盆地分布总体呈"东西分带"的特征,中生界与上古生界叠合区域为前新生代油气勘探有利区。结合残余厚度与油气条件,进一步圈划出10个前新生代油气资源有利区。

Macro spatial distributioin of residual basins in the circum-Bohai Bay area and the characteristics of their residual thickness distribution are defined through peeling off the influences of the Cenozoic and deep basement and by adopting an integrated geophysical method.The method is mainly based on gravity and magnetic data,and it takes data of high accuracy such as MT and shallow seismic data as the constraints and is realized through forward modeling and inversion.The residual basins in the area shows an‘E-W zonation',with the superimposed area of the Cenozoic and Upper Paleozoic as the favorable target for the Pre-Cenozoic oil and gas exploration.Ten favorable areas of the Pre-Cenozoic are also defined through combining the residual thicknesses of the basins and geological conditions for oil and gas accumulations.

10.11743/ogg20080513