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玛湖-盆一井复合含油气系统是准噶尔盆地中最重要的复合含油气系统之一,该复合含油气系统包含了下二叠统佳木河组、风城组、中二叠统下乌尔禾组在内的三套主要烃源岩。上三叠统白碱滩组的大套泥岩是该复合含油气系统中最重要的一个区域性盖层。该复合含油气系统自形成以来,主要经历了三个关键时刻;三叠纪末,是佳木河组的大量生气期和风城组的生油高峰期,也是西北缘油气主要成藏期;白垩纪,为乌尔禾组的主要生油期,也是陆梁隆起中西部石油的主要成藏期;第三纪,是乌尔禾组的生气高峰期,也是陆西南地区天然气的主要成藏期。
The Mahu-Pengyi- well composite petroleum system is one of the most important composite petroleum systems in the Junggar Basin. The composite petroleum system consists of the Lower Permian Jiamuhe Formation, the Fengcheng Formation and the Middle Permian Xiawu Erhe group, including three sets of major source rocks. The large set of mudstones in the Upper Triassic Baijiantan Formation is the most important regional caprock in the composite petroleum system. Since its formation, the composite petroleum system mainly experienced three key moments; the end of the Triassic period was a large amount of gas generation period of the Jiamuhe Formation and a peak period of oil generation in the Fengcheng Formation and also a major hydrocarbon accumulation period in the northwestern margin; and chalk Ji, Wuerhe formation of the main oil-producing period, but also Luliang uplift in the Midwest oil major reservoir period; Tertiary, Wuerhe formation of the peak period, but also the main gas accumulation period of Southwest Lu gas .