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不整合面不仅可以使已形成的油气藏遭到破坏 ,而且在一定程度上对油气藏的形成起到重要作用 .通过理论及实例分析 ,阐述了不整合面在油气藏形成中的重要作用 .不整合面的存在可使源岩发生二次生烃作用 ,不整合面可改善其上下地层储集空间和性能 ,也可作为油气侧向运移通道 ,导致不同层系的油气聚集 .不整合面的存在可提供潜山型、地层剥蚀型和地层超覆型 3种圈闭 ,这些圈闭是不整合面附近油气聚集的主要场所
The unconformity surface can not only destroy the formed reservoirs, but also to some extent play an important role in the formation of the reservoirs.According to the theoretical and practical analysis, the important role of the unconformity in the formation of the reservoirs is expounded. The presence of unconformities can cause secondary hydrocarbon generation in the source rocks, and the unconformity can improve the reservoir space and performance of the upper and lower strata, as well as lateral migration of oil and gas, resulting in the accumulation of hydrocarbons in different strata. The existence of the surface can provide three kinds of traps of buried hill type, stratigraphic erosion type and stratigraphic overtopping type. These traps are the main sites for hydrocarbon accumulation near the unconformity