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针对东营凹陷永8断块油藏储层特征和圈闭情况,建立了油藏物理实验模型,设计了连续充注和幕式充注2种类型的油气充注实验方案。结果表明:连续充注受储层层间非均质性和浮力的影响较为明显,油气首先充注构造高部位和渗透率最高的砂层,低渗透砂层受高渗透层的屏蔽作用为水层;幕式充注实验中,在油气供应量充足和充注压力超过一定值的状态下,油气进入圈闭不受构造位置高低和渗透率大小的影响。该结果与永8断块油藏现存油气分布状态及动力来源的分析结果吻合较好,可以认为永8断块油气藏的形成以幕式油气充注方式为主。
According to reservoir characteristics and traps of the Yong 8 faulted block reservoir in Dongying Depression, a reservoir physical experiment model was established, and two types of experiments were designed for continuous charging and curtain charging. The results show that continuous charge is more affected by interlayer heterogeneity and buoyancy. Oil and gas are firstly filled in sandstone with high structure and high permeability. Low permeability sandstone is shielded by high permeability layer In the curtain charge experiment, the oil and gas entering the trap are not influenced by the height of the structure and the permeability, provided that the amount of oil and gas supply is adequate and the charge pressure exceeds a certain value. This result agrees well with the existing analysis of oil and gas distribution and source of the Yong 8 faulted block reservoir. It can be concluded that the formation of the Yong 8 faulted block is dominated by the episodic oil and gas filling.