Petroleum exploration is expanding to (super-) deeply buried strata worldwidely. Along with this trend, the hydrocarbon accumulation in lower assemblage of the deeply-buried Jurassic strata in the southern Junggar Basin in northwest China is becoming one of the important targets for basin,s exploration. However threre are few related studies due to relatively low degree of exploration. This paper studies source rocks and discusses the controlling factors of hydrocarbon accumulation in the southern Junggar Basin, inorder to provide new information on regional exploration and similar studies worldwide. Firstly, we evaluated generation potential of the Jurassic source rocks by way of abundance, type and maturity of organic matter in combination with geological setting. The Jurassic source rocks are of relatively good quality, having good hydrocarbon generation potential both for oil and for gas. Secondly, the well-studied Well Xihu 1 was selected as a representative to confirm the effectiveness of the oil and gas generation potential by analyzing hydrocarbon geochemistry. Lastly, through a hydrocarbon accumulation study, we found that there are multiple factors that control large-scale and effective hydrocarbon accumulation of deeply-buried strata in the southern Junggar Basin. Among them, charge intensity of hydrocarbon and physical property of reservoir were two key factors that need to be considered in future.% 国内外油气勘探当前正逐步向(超)深层拓展，在此背景下，准噶尔盆地南缘深层下组合侏罗系正成为该盆地油气勘探的一个重要领域，但其成藏研究因勘探程度较低而开展工作较少。为给深化区域油气勘探及国内外同类研究提供参考新信息，本文从烃源岩和成藏主控因素两方面开展了油气成藏研究。首先从有机质丰度、类型、成熟度三方面，结合地质背景评价了侏罗系烃源岩的生烃潜力，发现这是一套质量良好的烃源岩，既可生油，也可生气。其次，以区内研究基础条件相对较好的西湖1井为例，通过分析油气地球化学特征，揭示了侏罗系烃源岩成油成气的有效性。成藏分析发现，侏罗系所生油气能否大规模有效成藏的影响因素很多，油气充注不足和储层物性较差是今后勘探需要重点考虑的关键成藏要素。
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