摘要
利用钻井泥岩声波测井资料和实测地层压力资料 ,分析了东营凹陷流体压力系统的结构和分布及其影响因素 .单井的压力 -深度曲线呈现出“二段式” ,即上段正常压力系统 (正常压实带 )和下段异常压力系统 (欠压实带 ) .剖面和平面压力系统综合分析的结果表明 ,东营凹陷压力系统呈现环状结构 ,即内环为超高压系统 ,中环为高压系统 ,外环为常压 -低压系统 .中环高压系统和内环超高压系统构成了封闭的巨型超压封存箱复合体 ,因其与沙河街组三、四段活跃的烃源岩有着成因的联系 ,故称之为烃源岩 -超压封存箱复合体 (SR -OPCC) .受渗透性砂岩层、断层及盐构造等压力输导系统的影响 ,封存箱内产生压力分隔现象 ,形成了若干个由压力输导系统联系的次级超压封存箱 .概括了封存箱 -压力输导系统 -封存箱组合模式 .烃源岩 -超压封存箱复合体 (SR -OPCC)
Based on mudstone sonic log and measured fluid pressure, the paper analyzes the fluid pressure systems and the controlling factors of pressure system structures and distributions. According to the calculated pressure depth plot of drills, we can recognize two pressure systems. The upper is normal pressure system, and the lower is abnormal system. The pressure sections and plane maps show that there exist three ring pressure systems in Dongying depression. The inner ring is overpressured system. The middle ring is highly pressured system. The external ring is normal subnormal pressured system. The highly pressured and overpressured system made up a sealed compartment complex. Because the overpressured system includes the active source rock in the third and forth member of Shahejie Formation, the source rock compartment complex (SR OPCC) is named here. The pressure conduit systems in the abnormal pressured fluid compartments separate the SR OPCC into many smaller, nested subcompartments,which include permeable sandstone beds, faults and salt tectonics. So the model of the overpressured compartment pressure conduit system overpressured compartment is summarized in the paper. The SR OPCC has profound and lasting effects on the migration and accumulation of petroleum in Dongying depression.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2003年第1期78-86,共9页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金项目 (No .49872 0 45 )
