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通过对盖层与烃源岩之间时空匹配关系的分析,认为当盖层空间展布面积大于烃源岩分布面积时其对油气的聚集与保存才是有利的,否则是不利的。盖层的空间发育部位控制着不同类型油气聚集圈闭的形成,在斜坡区、古隆起顶部、凹陷中心和古隆起上方受盖层控制分别形成地层超覆、基岩风化壳、砂岩透镜体和受背斜控制的各种类型圈闭。盖层的毛细管封闭能力、压力封闭能力和烃浓度封闭能力的形成时期只有与烃源岩的大量排烃期分别合理匹配时,才能有效地封闭住烃源岩排出的与之对应的不同相态的油气,否则造成大量油气散失。
Based on the analysis of temporal and spatial matching between cap rock and source rock, it is considered that it is beneficial to accumulate and preserve hydrocarbons when the cover space is larger than the area of source rock, otherwise it is unfavorable. Capable of controlling the formation of various types of oil and gas accumulation traps in the capitulum, the formation of overlying stratigraphy over the slope area, the top of Paleoproterozoic, the center of depression and the paleo-uplift are dominated by overburden formation, bedrock weathered crust, sandstone lens and Trap controlled by various types of traps. Capillary sealing ability, pressure sealing ability and hydrocarbon concentration sealing ability formation period only when a large number of hydrocarbon source rocks of the period of a reasonable match, respectively, can effectively block the source rock discharge from the corresponding different phase Of the oil and gas, or cause a lot of oil and gas loss.