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为了研究油源断裂对油气聚集的控制作用,以南堡凹陷2号构造F_(10)断裂为例,在油源断裂厘定、断裂转换带识别的基础上,通过最大断距相减法对F_(10)断裂的古转换带进行了恢复,结果表明:F_(10)断裂上现今5个转换带在油气成藏期——明化镇组沉积时期已形成,且至今变化不大。通过断裂古转换带流体势、砂体、裂缝分布特征与油气分布之间关系研究,对F_(10)断裂古转换带输导油气的有利条件进行了研究,结果表明:F_(10)断裂古转换带输导油气的有利条件主要表现在以下3个方面:1油源断裂古转换带断面呈凸面状,为流体势的汇聚脊,有利于油气垂向汇聚运移;2油源断裂古转换带控制分支河道流向,砂体发育,有利于油气穿过断层进行侧向运移;3油源断裂古转换带应力集中,裂缝发育,有利于油气垂向和侧向运移。
In order to study the control effect of oil source fracture on hydrocarbon accumulation, taking the F 10 fracture in No. 2 Nanpu Sag as an example, based on the determination of oil source fracture and the recognition of fracture transition zone, 10) fault. The results show that the five conversion zones on the fault F10 have been formed during the hydrocarbon accumulation period - the Minghuazhen Formation, and have not changed so far. Based on the study of the relationship between fluid potential, distribution of sand bodies and fractures and the distribution of oil and gas in the Palaeozoic fracture belt, the favorable conditions for hydrocarbon migration in the paleo-transformation belt of the F 10 fracture have been studied. The results show that the F 10 fracture ancient The favorable conditions for the conversion of oil and gas in the transformation zone are mainly as follows: 1. The oil source fracture paleo-transformation belt has a convex section, which is a converging ridge of fluid potential, which is favorable for the vertical convergence and migration of oil and gas. It can control the lateral flow of the branches and the development of the sand body, which facilitates the lateral migration of oil and gas across the fault. 3 Oil stress fracture The paleo-transformation belt has stress concentration and fracture development, which is favorable for vertical and lateral migration of oil and gas.