关键词: 准噶尔盆地, 含油气系统, 形成, 演化, 分布

Abstract: Four petroleum systems are studied in Jungar basin in this paper, which are Carboniferous,Permian, Jurassic and Tertiary petroleum systems. Among them, Carboniferous and Jurassic systems are mainly gas-bearing systems, while Permian and Tertiary are mainly oil-bearing systems. Based on the distribution of source rocks and the characteristics of oil and gas,the ranges of these petroleum systems are determined. The range of Carboniferous gas-bearing system is a strip extending from Zhongguai-Shixi-Wucaiwan to Santai arch in the center of the basin; Permian oil-bearing system includes the southern area of Northwestern edge and Lunnan arch; Jurassic gas-bearing system is located in the southern part of Centre uplift; Tertiary system is limited near Sikeshu sag in Southern margin of the basin. The formation and evolution of the four petroleum systems are also discussed in this paper, and the importance of critical moment in the formation of petroleum system is emphasized.

Key words: Jungar Basin, petroleum system, formation, development, distribution