东营凹陷博兴地区油气成藏动力学与成藏模式
DYNAMICS AND MODELS OF HYDROCARBON ACCUMULATIONS IN BOXING AREA OF THE DONGYING DEPRESSION
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摘要: 根据东营凹陷西南部地区的地质背景和地层压力特征,探讨了该区的油气成藏特征、成藏动力学机制及成藏模式。成藏动力学机制可分为:自源封闭型和它源开放型。按照封存箱理论,油气藏的形成有箱内成藏、箱外顶部成藏和箱外边部成藏 3种模式;又分为近距离运移、垂向运移和侧向运移 3种聚集模式。成藏动力学背景对油气藏的形成与分布具有重要影响。Abstract: Based on a study on geologic setting and characteristics of formation pressure in Boxing area, the southwest part of the Dongying Depression, the formation conditions, dynamics mechanism and models of hydrocarbon accumulations were discussed in this paper. There were two dynamic mechanisms of hydrocarbon accumulations in the studied area: one was self-sourced and sealed dynamic mechanism, another was outward sourced and opened mechanism. According to the fluid compartment theory and data of formation pressure in the area, three formation models of hydrocarbon accumulations were summarized, namely, the model in the compartment, the edge model out-compartment and top model out-compartment, which could be grouped three petroleum migration and accumulation modes: short distance, vertical and lateral migration models.The accumulation dynamic settings affected the formation and distribution of hydrocarbon accumulations.
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