渤海湾盆地异常高压晚期形成特征分析  

Analysis on Late Origin of Overpressure in Bohai Bay Basin

作　　者：刘震[1] 许晓明[1] 谢启超[2] 赵阳[1] 戴立昌[1] 

机构地区：[1]中国石油大学石油天然气成藏机理教育部重点实验室,北京102249 [2]长庆油田公司勘探开发研究院,陕西西安710021

出　　处：《现代地质》2006年第2期259-267,共9页Geoscience

基　　金：国家"十五"重大科技攻关项目(2001BA605A09)

摘　　要：渤海湾盆地各凹陷的形成演化、异常高压纵向分布特征、异常高压主体分布层位和异常高压形成机制具有相似性。首先对东营凹陷、沾化凹陷和辽西凹陷进行了压力场演化的定性分析,结果表明渤海湾盆地凹陷异常高压形成的时代比较晚。然后对沾化凹陷的渤南洼陷进行了压力场演化的定量分析,结果表明渤南洼陷超压形成时代也比较晚,异常高压主体层段———沙四上段和沙三段的超压在东营期末开始形成。综合以上分析,认为渤海湾盆地现今异常高压具有晚期形成特征。Each sag of Bohai Bay Basin has some comparability on tectonic characteristics and evolution, the overpressure distribution in vertical, the main distribution strata and the origin mechanism of overpressure. Firstly by making a qualitative analysis on the pressure field evolution of Doying, Zhanhua and Liaoxi sags, we discover that the overpressure of the three sags developed late. Then, by making a quantitative analysis on the pressure field evolution of Bonan sub-sag, a typical overpressure sag in Jiyang depression, we discover that the overpressure of Bonan sub-sag developed late as well. The overpressure of the main strata which are the third member and the upper of the fourth member of Shahejie Formation, developed after Dongying episode. From the above we conduct that the overpressure of Bohai Bay Basin developed late.

关 键 词：渤海湾盆地 异常高压 渤南洼陷 压力场演化 晚期形成 

分 类 号：TE122[石油与天然气工程—油气勘探]