The essential elements are source rock, reservoir rock, seal rock and overburden rock, and the processes include trap formation and the generation-migration-accumulation of petroleum.
基本要素包括一套烃源岩、储集层、盖层和上覆岩层，作用是圈闭的形成和油气的生成—运移—聚集。
Oil deposit or oil field is a result of association of forming time with spatial distribution of source bed, reservoir, trap, migration and entrapment in petroleum system.
油气藏的形成是静态生油层、储集层、盖层、圈闭组合形态，与动态油气运聚时间、空间上的有利匹配的结果。
"Continuous" petroleum reservoirs refer to unconventional trap reservoirs existing in a large-scale unconventional reservoir system, and the distribution of oil and gas is continuous.
非常规油气藏指无法以经济流量开采或者不采取大规模增产措施或特殊开采工艺和技术就无法获得经济油气流量的油气藏。
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