济阳坳陷的泥质岩类油气藏

MUDDY HYDROCARBON RESERVOIRS IN JIYANG DEPRESSION

泥质岩类油气藏是世界范围内又一个重要的油气勘探新领域。本文在系统调查济阳坳陷内泥质岩油气显示基础上,剖析了油气藏形成条件和分布规律。指出泥质岩类油气藏以自生自储为主,可分裂缝型、孔隙型及复合型3类7种。成藏条件受油源、岩相、构造及成岩等多因素控制,主要分布于盆地内成熟生油岩体中富有机质、富钙质和含砂质条带的泥页岩之中;长期活动的大型断裂、断鼻、断隆构造是泥质岩类油藏主要分布区。文中最后结合油藏特点,资源潜力及目前勘探技术、认识水平指出了这类油气藏近期勘探策略。

Muddy hydrocarbon reservoir is a new important category in oil and gas exploration worldwidely. On the basis of a systemmatic investigation of oil and gas shows in the muddy formations in JiYang depression, this paper analyzes the formation and distribution of such reservoirs, and points out that these reservoir are formed mainly from an accummulation of the oil and gas generated in the reservoir formation and can be classified into 3 types and 7 kinds, the formation of such reservoirs is governed by multiple factors, such as hydrocarbon source, lithofacies, structures and genesis. They are distributed mainly in the organic rich calcium rich. Muddy and shaly rocks containing sandy strips in the matured hydrocarbon source rock bodies in this basin, and are distributed mainly in regions with long-term large scaled fault, fault-nose and fault-uplift structures. This paper suggests a strategy for the near term exploration of such reservoirs according to the characteristics and potential of these reservoirs based upon a current understanding of them.