渤海湾盆地东营凹陷南区通王断裂带下第三系成藏动力及输导体系特征

CHARACTERISTICS OF POOL-FORMING DYNAMICS AND CONDUCTING SYSTEMS IN THE LOWER TERTIARY OF THE TONG-WANG FAULT BELT,THE SOUTH DONGYING SAG,THE BOHAIWAN BASIN

通—王断裂带位于济阳坳陷东营凹陷南部缓坡带,它和更广范围的牛庄洼陷及东南斜坡带的地温-地压系统在剖面上表现 为高压型复式温-压系统:其浅部为静压型温-压系统,深部为超压型温-压系统,下第三系在平面上基本由较高的能量环境覆 盖。本区构造油气藏和地层油气藏主要受流体势控制,在相对低势区发育,而岩性油气藏不受区域流体势场的限制,可以在相对 低势区上分布,也可以在相对高势区内出现。砂层和断层是本区油气侧向和垂向运移的主要通道,不整合面对油气侧向运移也起 着重要作用,油气运移具有明显的阶梯式运移特征。

The Tong-Wang fault belt is located at the south slope of Dongying Sag, Jiyang Depression. The vertical characteristics of geotemperature and formation pressure system (T-P system) is shown as overpressure multiple T-P system:normal T-P system in the upper formations and overpressure T-P system in the lower formations. The Lower Tertiary in this area is covered by relatively stronger power environment. Structural and stratigraphic reservoirs in this area are mainly controlled by fluid potential, and are distributed at relatively weaker fluid potential place. Lithological reservoirs, not restricted by fluid potential, exist at both relatively weaker and higher fluid potential places. Sand bodies and faults are main (carrying) beds for lateral and vertical oil-and-gas migration, while unconformity is also important for oil-and-gas lateral migration. Ladder-like migration is the distinct characteristics of oil-and-gas migration in the study area.