The Permian Wuerhe Formation in the northwest margin of Junggar Basin is a complex petroleum system with both source rocks and reservoir rocks.
准噶尔盆地西北缘二叠系乌尔禾组地层是既有烃源岩又有储集岩的复合含油气系统。
The essential elements are source rock, reservoir rock, seal rock and overburden rock, and the processes include trap formation and the generation-migration-accumulation of petroleum.
基本要素包括一套烃源岩、储集层、盖层和上覆岩层，作用是圈闭的形成和油气的生成—运移—聚集。
The wide development strata overlap belt of different period and different level provided passage for petroleum migration, created beneficial reservoir conditions for strata reservoir formation.
不同时期、不同级别的地层超覆带的广泛发育为油气运移提供了通道，也为地层油气藏的形成创造了有利的圈闭条件。
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