分析了三塘湖盆地石炭系卡拉岗组(C2k)火山岩油藏的成藏主控制因素,认为优势的岩性与岩相、良好的烃源岩供给、深大断裂及伴生裂缝和一定的后期改造作用共同控制了卡拉岗组火山岩的油气成藏。处于近火山口溢流相的杏仁状安山岩和玄武岩是油气成藏有利的岩相与岩性。哈尔加乌组(C2h)良好的烃源岩供给是油气成藏的物质基础。深大断裂及伴生裂缝是沟通油源、增强油藏疏导能力的重要因素。一定的后期改造是储层物性改善的关键。 The controlling factors of hydrocarbon accumulation in the C2k volcanic reservoir in the Santanghu Basin are analyzed. The dominant lithology and lithofacies, good source rock supply, deep and associated fractures, The reconstruction effect controlled the formation of volcanic rocks in the Karakang Formation. Almond-shaped andesite and basalts in the nearly crater-overflow phase are favorable lithofacies and lithologies for hydrocarbon accumulation. The good hydrocarbon source rock supply in Halhawu Formation (C2h) is the material basis of hydrocarbon accumulation. Deep faults and associated fractures are important factors to communicate oil source and enhance reservoir drainage ability. A certain post-transformation is the key to reservoir physical properties.