Characteristics of Hydrocarbon Source Rocks in Liaozhong Sag of Liaodong Bay

The geochemical characteristics analysis of hydrocarbon source rock is expected to help evaluate the resources in Liaozhong sag paleogene.The results show that:the organic matter abundance of Es1 is 1.997% and the type of organic matter is Ⅱ1 with maximum productivity,but low in hydrocarbon generation and weak in the deposition thickness of Es1,thus not belonging to chief source rock;the organic matter abundance of Es3 is 1.64%,and the type of organic matte is Ⅱ1,which is in a mature-high-mature stage;the organic matter abundance of Ed3 is 1.715%,and its type is Ⅱ1～Ⅱ2,which is in the mature stage.It is confirmed that Es3 and Ed3 are good hydrocarbon source rock of Liaozhong sag.And its failure in numerous exploitation of good hydrocarbon source rock is due to inadequate well and non-systematic sampling.