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通过对沉积相时空展布特征、烃源岩及油气形成地球化学特征的研究，将准噶尔盆地侏罗系烃源岩划分为沼泽相和湖泊相两大类型。沼泽相烃源岩生烃组分主要为来源于高等植物的基质镜质体和壳质组，形成的油藏有齐古油田的Ｊ１ｂ油藏；湖相烃源岩生烃组分主要为藻类体、藻无定形体、菌解无定形体、壳质组和镜质组等，主要分布在腹部漠区凹陷和阜康凹陷，为半深湖相－浅湖相沉积，有机质以Ⅱ型为主，部分偏Ⅰ型或Ⅱ型，形成了彩南油田和某些井的油气。沼泽相烃源岩生烃期Ｒｏ值为０．５％～０．９％；湖相烃源岩演化程度也普遍较低，Ｒｏ值多数在０．５％～０．８％范围。湖相烃源岩生物标志化合物的组成特征，明显反映了其生源构成比例和热演化程度的差异。差异成熟使轻组分早熟早排，分期排烃，明显出现低成熟和成熟两个油气生成带，前者生烃期Ｒｏ值大约为０．４％～０．７％，后者生烃期为０．８％～１．２％。准噶尔盆地腹部侏罗系，尤其是中、下侏罗统，并非均是煤系地层，因此在勘探战略上应当引起足够的重视。
Based on the study of temporal and spatial distribution of sedimentary facies, source rocks and geochemical characteristics of oil and gas formation, the Jurassic source rocks of Junggar Basin are divided into two major types: swamp phase and lacustrine phase. The hydrocarbon generation components of marsh facies hydrocarbon source rocks are mainly composed of matrix vitrinite and chitoid from higher plants, and the reservoirs formed are J1b reservoir of Qi Gu oilfield. The hydrocarbon generation components of lacustrine source rocks are mainly algae, Algal amorphous body, amylolytic amorphous body, chitin group and vitrinite group, which are mainly distributed in the belly desert depression and Fukang depression, which are semi-deep lacustrine-shallow lacustrine sediments. The organic matter is mainly type II, Part of the partial Ⅰ or Ⅱ type, forming a Cainan oil and some wells oil and gas. The source rocks of marsh facies have a Ro value of 0.5% ~ 0.9% during the hydrocarbon generation stage. The evolution of source rocks in the lacustrine phase is also generally low, with Ro values ranging mostly from 0.5% to 0.8%. The compositional characteristics of biomarkers of source rocks in lacustrine facies obviously reflect the difference of their source composition ratio and thermal evolution degree. Differentiation and maturity make the light components premature, early stage, hydrocarbon expelling stage, obviously low maturity and mature two oil and gas producing zones, the former is about 0.4% ~ 0.7% during the hydrocarbon generation period, the latter is 0.8% ~ 1.2%. The Jurassic belly in the Junggar Basin, especially the Middle and Lower Jurassic, are not all coal-bearing strata. Therefore, enough attention should be paid to the exploration strategy.