ZONED-DISTRIBUTION OF OIL AND GAS ACCUMULATION IN FAULT DEPRESSIONS IN THE SONGLIAO BASIN

The First,Third and Fourth Members of the Shahejie Formation in the Bonan,Gu'nan and Fulin Subsags are the main source rocks of the reservoir in the northern slope of the Eastern Chenjiazhuang Uplift, the Jiyang Depression,the Bohai Bay Basin.By the analysis of source rock characteristics and oil-source rock correlation,the oil of the Ken68 and Ken69 wells are mainly from the Third Member of the Shanhejie Formation in the Bonan Subsag.The faults,sandbodies,unconformable surfaces and complex channels made up of faults,sandbodies,unconformable surfaces are the main migration pathways for oil and gas.