江陵凹陷万城断裂带成藏主控因素及勘探潜力

Controlling factors of hydrocarbon accumulation and exploration prospect of Wancheng fault zone,Jiangling depression

分析了万城断裂带油气成藏条件,通过油藏解剖,指出白垩系成藏主控因素表现为源断双控、圈闭条件是基础、储层控制油气富集;同时分析了本区潜山成藏条件,指出潜山具有海相烃源和新下段供烃及内幕成藏的可能性;提出继续深化白垩系、加深钻探古潜山是下步勘探思路。

By analysis of the hydrocarbon accumulation conditions in Wancheng fault zone,and combining with the oil and gas distribution and accumulation study of the discovered reservoirs, it is revealed that the main controlling factors for oil and gas accumulation at Cretaceous Period include the effective source rocks,the faults,and the favorable reservoir bed;and the existence of an effective trap is one of the key factors.Meanwhile,study on hydrocarbon accumulation of buried hill type reservoir shows that the source rocks are characterized by marine origin that probably locate in the lower Xingouzui Member.Therefore,it is necessary to carry out more detailed study on oil and gas accumulation at Cretaceous Period,and the buried hill type reservoir shouldl be considered as a target for the exploration prospect in the near future.