番禺4洼地区新近系油气成藏主控因素分析

An analysis of the main controls on Neogene hydrocarbon accumulation in Panyu 4 sag

番禺4洼是一个典型的富生烃洼陷,区域性海泛泥岩、局部基底古凸起及晚期断裂是该区新近系油气成藏的主控因素,它们共同控制了本区油气的运聚、成藏及最终分布。番禺4洼南侧断裂发育区圈闭成藏条件好,位于烃源岩上方或局部凸起区之上并靠近洼陷的圈闭成藏机率较高。

Panyu 4 sag is a typical hydrocarbon-rich sag, where Neogene hydrocarbon accumulation processes, including migration, trapping and final distribution, are mainly controlled by regional flooding mudstones, local basement salients and late faults. There are good trapping conditions in a faulted area along the south side of Panyu 4 sag, and the traps over source rocks or local salients and near the sag centre are higher in probability of hydrocarbon accumulation.