Geochemical Characteristics of Chang-8 Crude Oil in Qingyang-Zhenyuan Area of Ordos Basin
Taking Chang-8 oil and Chang-7 dark mudstone of Yanchang Formation of Triassic in Qingyang-Zhenyuan area as the research object,this paper conducted geochemical characteristics of Chang-8 oil,comprehensive evaluation of Chang-7 source rock and oil source correlation study by means of rock pyrolysis,organic matter microscopy of source rock,chromatography-mass spectrometry and other analytical tests.The results show that the Chang-8 oil in Qingyang-Zhenyuan area has good physical properties,low carbon number n-alkanes are dominant in crude oil,and the parent material of crude oil consists of both terrestrial plants and aquatic organisms,and the contribution of aquatic plants to crude oil is relatively large.The Ts/Tm value of crude oil is at a moderate level,which has reached the standard of mature crude oil.The oil source in Qingyang-Zhenyuan area is compared and analyzed,indicating that Chang-8 crude oil mainly comes from Chang-7 source rock.
geochemical characteristicshydrocarbon source rockhydrocarbon generation potentialoil source analysisQingYang-ZhengYuan area
万方数据
维普
