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孤南洼陷是渤海湾盆地济阳坳陷内的一个洼陷，该洼陷具有很好的油气成藏条件。洼陷内发育沙三段和沙一段两套良好的生油岩，同时它们又是区域盖层。储集居主要包括第三系碎屑岩和中生界火山碎屑岩。本区圈闭多与断层有关，圈闭的形成与油气的运移聚集有良好的配置关系。两套生油岩分别对应着两个成藏期。根据两套生油岩，两个成藏期可以识别出两个油气成藏系统，两个成藏系统的油气形成与分布规律不同，它们既相互独立，又通过断层和不整合联结。断层对本区油气藏的分布起控制作用，靠近洼陷中心的边界断层是油气富集的主要地区，同时也是勘探远景区。
Nannan Sag is a subsidence within the Jiyang Depression in the Bohai Bay Basin, which has good hydrocarbon accumulation conditions. Two sets of good source rock are developed in the third member of Shahejie Formation and the first member of Shahejie Formation. At the same time, they are regional cap rocks. Reservoirs mainly include Tertiary clastic rocks and Mesozoic volcaniclastic rocks. The traps in this area are mostly related to faults, and the formation of traps has a good relationship with the migration and accumulation of oil and gas. Two sets of source rock correspond to two periods of hydrocarbon accumulation. According to two oil-bearing rocks, two hydrocarbon accumulation systems can be identified in two hydrocarbon accumulation periods. The formation and distribution of oil and gas in the two hydrocarbon accumulation systems are different. They are independent of each other and are linked by faults and unconformities. Faults play a controlling role in the distribution of oil and gas reservoirs in this area. Boundary faults near the center of the depression are the major areas for oil and gas enrichment and are also exploration prospect areas.