The study of the hydrocarbon accumulation periods in Qingdong Depression

摘要

Qingdong Depression is a relatively lowrndegree of exploration area which lies in the east ofrnthe Jiyang superdepression and on the west side ofrnthe Tan Lu Fault zone. According to therncharacteristics of hydrocarbon source rocks, fluidrninclusion petrographic observation, the analysis ofrnhomogenization temperature and paleosalinityrndetermination and the crude oil properties andrncomposition analysis etc. the author believes thatrnthe area has a great potential of hydrocarbonrnresources which experiences two periods ofrnhydrocarbon filling, but the accumulation stages arernrelatively late which one period mainly occurred inrnNg and the other mainly occurred in Nm~Q.