【摘要】 油气成藏作用是在含油气盆地的油气系统及其子系统(生烃系统、运移系统和聚集系统)中发生的,在烃类从烃灶排出直至充注到圈闭中富集成油气藏的全过程中,不仅有空间位置的运动,烃体系还会发生一系列物理、化学的变化。系统论是成藏作用研究的重要理论基础之一。成藏机制是成藏作用研究的中心课题,研究内容包括:说明导致烃流体运动状态变化的起因、驱动力和规律的“动力学”研究;分析烃类空间位置随时间变化的关系及成藏过程中输导网络体系(实质上是阻滞体系)的规模和样式、运移和聚集的条件、成藏期次等的“运动学”研究;判断油气聚集和保存问题,即在外界作用下保持烃流体相对稳定(平衡)状态条件的“静力学”研究。封存箱是形成大型油气藏的非常重要而普遍的流体运聚结构。以塔里木盆地库车油气系统为例,分析了该系统的流体孔隙压力纵向结构及平面分布、变化,探讨了南、北两个地带的成藏作用,组构了3种成藏模式:①正常压力封存箱内早期聚集、晚期再充注的渗流成藏机制的牙哈模式;②异常高压封存箱内晚期对流成藏机制的克拉苏模式;③封存箱外涌流成藏机制的大宛齐模式。图5参49更多还原

【Abstract】 Oil and gas pool forming process is happened within the petroleum system and its sub system, including hydrocarbon generation, migration and accumulation system. In the whole process of hydrocarbon release from sources to accumulation into traps, physical and chemical reactions, as well as space motion happened. The systematology is one of theories on oil and gas pool forming process. TEe key research of oil and gas pool forming process is the formation mechanism, including the kinetics, dynamics and statics research. The compartment is very important and commom fluid migration and accumulation configuration for forming huge oil and gas fields. Taking the Kuche Oilfield, Tarim Basin, as an example, the vertical structure and horizontal pressure distribution and variation is analyzed, and the oil and gas pool forming process of the north and south belt is discussed. There are three types of oil and gas pool forming mechanism in the Kuche petroleum system: ① Yaha Mode, with a normal-pressure compartment charged early and recharged late; ② Kelasu Mode, with surpressure compartment of late convectionl ③ Dawanqi Mode, with the outpooring flow outside the compartment.更多还原