冀东柳赞地区油气成藏中断层的作用

FAULTING IN FORMATION OF POOL IN LIUZAN REGION OF EASTERN HEBEI

冀东油田柳赞地区断裂构造发育,在面积约为40km2范围内;发育着30多条断层,而这些断裂是什么时期产生的,它们在油气聚集成藏中起着什么作用,是先有油气聚集、后有断裂,还是先有断裂后才发生油气聚集。这些问题不仅是油气成藏过程研究的焦点,而且还直接影响到对该地区的评价和有利油气聚集带的确定。本文通过研究发现,本区断裂的形成和分布主要受柏各庄、溯河、高柳三条边界断裂活动的控制,并且断裂的产生是有次序的,不同时期形成的断层对油气藏的形成具有不同的作用。

Faults are well developed in Liuzan region in Jidong (eastern Hebei)oil field,and there are more than thirty faults in 40km2.But there are several key issues that need to be solved,such as when these faults wre formed,what function these faults acted on oil and gas accumulation and pool formation,and does hydrocarbon accumulation results in faulting or vice rersa?These are critical problems in pool formation study,as well as in resources assessment in this region and identification of favorable exploration targets.The authors study shows there is a sequence for fault formation.Fault formation and distribution are controlled by boundary fault of Baigezhuang,Shuohe and Gaoliu.Fault played different roles in pool formations in different times.