渤中28-2南油田是黄河口凹陷一个探明储量超过5 000万t的浅层明下段整装优质油田,原油具有高凝固点、高含蜡量、中等胶质与沥青质和低含硫量等特点.成藏分析表明,渤中28-2南油田原油成熟度高,油气主要来自构造围区沙三段烃源岩,沙一段—沙二段烃源岩有少量贡献；沟通烃源岩的走滑调节断裂是渤中28-2南油田油气高效纵向输导通道,该油田成藏期为距今2.6Ma以来,具有油气持续快速充注富集成藏的特点.渤中28-2南油田独特的油气富集模式对于拓展渤海南部新近系浅层构造-岩性油气藏勘探、复杂断块勘探和类似的新生代裂谷盆地战略选区具有一定的参考意义.%As an uncompartmentalized and excellent shallow N1m1 oilfield located in Huanghekou sag, BZ28-2S has more than 50 million tons of proven oil reserves, and is characterized by high solidification point, high wax, medium gum and asphaltine and low sulfur. Rase on an analysis of hydrocarbon accumulation, it is believed that oil in BZ28-2S is high in maturity and mainly derived from adjacent E2s3 source rock,rnwith E3 s1 and E3 s2 source rocks minor in contribution. In BZ28-2S oilfield, the adjusting strike-slip faults connected to source rocks are effective vertical pathways of hydrocarbon migration; and hydrocarbon was charged continuously and enriched rapidly since 2. 6 Ma. This unique accumulation model in BZ28-2S oilfield may be an important reference for expanding exploration of structural-lithologic accumulations and complex fault blocks in shallow Neogene in the southern Bohai bay and selecting strategic exploration areas in similar Cenozoic rift basins.
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