Characteristics and Origin of Crude Oils from Well Tazhong 82 Area of Tazhong Uplift
塔中82井区原油的特征及成因

This paper discussed the characteristics and origin of crude oils found in well Tazhong 82 area by systematic geochemical analysis.It shows that saturate fraction is the main component in the oils,while low carbon n-alkanes are the main composition of the saturated hydrocarbon,the ratio of C21-/C22+ ranging from 1.4 to 5.4 and the biomarker content being very low.After n-alkanes being removed by molecule sieves,the biomarker content is still very low,the sterane contents of C27-C28-C29 have the distribution...