渤海残留盆地分布综合地球物理研究  

Integrated geophysics research on distribution of residual basins of Bohai Sea

作　　者：徐亚[1] 郝天珧[1] 戴明刚[1] 赵百民[1] 李军[1] 涂广红[1] 赵玉合[1] 

机构地区：[1]中国科学院地质与地球物理研究所,北京100029

出　　处：《地球物理学报》2007年第3期868-881,共14页Chinese Journal of Geophysics

基　　金：中国科学院知识创新工程重大项目(KZCX-SW-18-01);国家自然科学基金(40620140435;40674046)联合资助

摘　　要：以活动论构造历史观为指导进行渤海海域残留盆地宏观分布特征研究.以岩石物性为基础建立地质界面与物性界面的联系,通过重、磁、震等方法组合圈画不同物性界面的分布特征.浅层沉积盆地结构通过反射地震资料控制,深层地质结构信息利用重磁异常场分离、物性界面反演等方法得到.在地层分布格架基础上分析前新生代残留盆地宏观分布范围.并结合渤海海域实例研究介绍了残留盆地宏观分布研究的技术方法和流程,在计算上古生界-中生界及元古界-下古生界残余地层厚度的基础上给出了渤海海域残留盆地的宏观分布范围,并指出在歧口凹陷东南部、石臼坨隆起南部及东北部、渤南凸起南部、辽东湾等地区是较好的前新生代油气潜力区.Macro-distribution of Pre-Cenozoic residual basins research is carried out under the guidance of integrated geology and geophysics theory. Based on rock physics properties, the relationship between geological interfaces and physical property interfaces is built, and the distribution of interfaces can be obtained based on different geophysical data. The shallow sedimentary basin structure can be obtained from reflection seismic data; basement undulation and deep structure can be obtained from gravity and magnetic inversion. Regional-residual potential field is separated by forward computation, filter operation and wavelet analysis. Basement undulation is inversed from corresponding anomaly using Parker-Oldenburg method. Residual strata thickness can be computed based on the distribution of the interfaces and macro-distribution of residual basin can be inferred with geological information. A case study of Bohai Sea shows the technique route of macro-distribution research on residual basins. There exist residual basins in south part of Qikou sag, south and northeast part of Shijiutuo uplift and Liaodong Bay area, and they have Pre-Cenozoic oil and gas potential.

关 键 词：残留盆地 重磁异常 岩石物性 综合地球物理研究 

分 类 号：P631[天文地球—地质矿产勘探]