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通过油藏解剖和油藏与成藏条件之间空间匹配关系研究,认为:海—塔盆地中部断陷带南二段油藏主要为分布在断阶带、断鼻和洼中隆上的断层油藏;南二段油藏分布受南一段源岩分布范围、断陷中断阶带和洼中隆的位置、扇三角洲前缘亚相砂体分布、早期伸展断裂沟通生油岩与储层程度等4个主要因素控制;油气成藏模式为洼槽中南一段源岩生成的油气在浮力作用下,通过早期伸展断裂错断与南二段储层侧接,向断阶带或洼中隆上的断块和断层—岩性圈闭中运移聚集成藏的模式。
Through the study of reservoir anatomy and spatial matching between reservoir and reservoir forming conditions, it is concluded that the reservoirs in the second member of the second member of the central fault zone in the central sea-tower basin are mainly faults distributed in the fault zone, fault nose and depression Reservoir; the distribution of South Second Member reservoir is affected by the distribution range of source rocks in the first member of the South China Paleozoic, the location of fault subsidence fault zone and the location of the submarine Longzhang, the distribution of sub-facies sand bodies in the fan delta front, the early extension faults, And other four major factors; oil and gas accumulation mode is that the oil and gas generated by the source rocks in the middle and southern part of the depression are buoyed by early extensional fault faults and flanked by reservoirs in the second member of the South Second Member, Fault block and fault-lithologic trap migration and accumulation.