Correlation of Oils and Source Rocks of Es4 and Its Petroleum Geology Implication in Linnan Area,Jiyang Basin

According to correlations of oils and source rocks in Linnan area,it shows that there are three types of oils,namely Es_3,Es_4,and mixed one.The low-mature oil is ejected from early source rocks,and mature oil from later ones,of Es_4.The former distributes in the edge and the later in the inside,of the basin.Therefore,it is confirmed that source rock of Es_4 has a great effect on the oil and gas deposits.This provides the basis for studying on forming regularities of oil and gas deposits and the favorable exploration orientations.