陆相断陷盆地油气差异聚集模式探讨——成藏动力、输导、方式的关系  

Discussion on hydrocarbon differential accumulation mode in continental rift basins-relationship of dynamics, conduit and pattern

作　　者：郝雪峰[1] 尹丽娟[1] 

机构地区：[1]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《油气地质与采收率》2014年第6期1-5,111,共5页Petroleum Geology and Recovery Efficiency

基　　金：国家科技重大专项"大型油气田及煤层气开发"子课题"济阳坳陷油气富集机制与增储领域"(2011ZX05006-003)

摘　　要：油气差异聚集模式是石油地质学的经典模式之一,在基本条件和机理分析的基础上对其在陆相断陷盆地环境中的存在条件和适用范围进行了探讨。油气差异聚集模式的实现条件隐含单一烃源岩层系或持续生烃演化过程、连续的排烃和以浮力为主的二次运移过程、以渗透性连通砂层为主要输导体系、统一的流体动力系统等;而当前陆相断陷盆地成藏理论研究中不连续的生烃演化过程、幕式充注过程、输导体系时间和空间有限性、异常流体封存箱与流体分隔体系等,已成为主要观点,严格符合差异聚集模式的油气运聚只能是特殊简单状态,油气充注很可能是在盆地输导体系一定范围内同时对圈闭进行充注,区别在于充注数量以及方式的差异,而对于盆地系列圈闭油气成藏模式的影响,是理解为多个不同成藏阶段油气差异聚集过程的复合叠加,还是不同时间段油气差异聚集作用的简单叠加,以及由此产生的不同类型油藏与不同性质流体的分布空间模式差异性,还有待于在实践中深入探讨。Differential accumulation mode is one of the classic mode in the petroleum geology which suggests a series of conditions in-cluding a single source rock or a sustained hydrocarbon-generation evolution, a continuous hydrocarbon expulsion process, a buoyan-cy-based secondary migration process, a carrier system mainly based on permeable and connected sand bodies, and a unified fluid dy-namic systems; current reservoir-forming theory in the continental rift basin mainly focus on continuous hydrocarbon-generation, evolu-tionary process, episodic charging process, carrier system time and space finiteness, abnormal fluid compartment and isolated-fluid sys-tem. This paper argues that hydrocarbon migration and accumulation suitable for differential accumulation mode can only be a specialsimple state. Oil and gas filling is likely to occur within a certain range of basin carrier system. The difference exists in the number offillings. It will be discussed in practice about whether the influence of basin-scale series traps accumulation mode is a complex super-imposition of a number of differential accumulation process or a simple superimposition of several periods of differential accumulation,and the influences on reservoir type and space distribution mode of different fluid are also uncertain.

关 键 词：断陷盆地 油气差异聚集原理 连续均一 幕式 异常高压 

分 类 号：TE112.31[石油与天然气工程—油气勘探]