准噶尔盆地东北缘侏罗系沉积时期 ,存在地形坡折带。根据不整合面、稳定分布的厚煤层等标志将侏罗系中下统划分成 4个沉积层序。以地层叠置样式、局部分布的煤层以及地形坡折带在沉积层序中的位置 ,细分出低位、湖侵和高位体系域。低位体系域以深切谷 (辫状河 )沉积为特征 ;湖侵体系域以广泛分布的湖相沉积为特征 ;高位体系域发育进积式三角洲。在建立具地形坡折带的陆相湖盆含煤岩系层序地层模式和分析成藏条件的基础上 ,预测低位体系域深切谷和高位体系域三角洲前缘远端透镜状砂体是隐蔽圈闭发育的地区 During the sedimentation of the Jurassic in the northeastern margin of the Junggar Basin, there are terrain slope break zones. According to unconformity, stable distribution of thick coal seam and other signs will be divided into four sedimentary sequences of the Middle Jurassic. Based on the stratigraphic superimposition pattern, the local distribution of coal seams and the location of the topographic slope break in the sedimentary sequence, the submarine, lake invasion and highstands are subdivided. The lower system tract is characterized by the deposition of deep valleys (braided rivers); the lacustrine system tracts are characterized by the widespread lacustrine deposits; and the highstand systems tract develops the ascending delta. Based on the sequence stratigraphic model of the coal-bearing strata in the terrestrial slope-break zone and the analysis of hydrocarbon accumulation conditions, it is predicted that the lenticular sand bodies at the front of the delta front in the deep valleys and highstand system systems of the lowstand system tract are hidden traps Developing area