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陆上与水下喷发火山岩在岩性、结构构造、蚀变特征、产状、与下伏地层接触关系、孔隙和裂缝发育特点等方面有显著区别。三塘湖盆地石炭系发育卡拉岗组(C2k)和哈尔加乌组(C2h)共2套储层,通过对这两个组的火山岩地球化学特征、岩性特征、蚀变特征、岩相类型、结构构造等进行研究,认为C2k以陆上喷发为主,而C2h为水陆过渡的环境,但以水下喷发为主。结合其储集空间的发育情况,综合分析认为陆上喷发环境储集性能优于水下喷发环境。
Volcanic rocks onshore and underwater have significant differences in lithology, structural structure, alteration characteristics, occurrence, contact with underlying strata, pore and fracture development characteristics. There are two reservoirs in the C2k and C2h reservoirs of the Carboniferous in the Santanghu Basin. By analyzing the geochemical characteristics, lithological characteristics, alteration characteristics, lithofacies, Type, structural structure and other studies, that C2k to land-based eruptions, and C2h water and land transition environment, but mainly underwater eruptions. Combined with the development of its reservoir space, a comprehensive analysis shows that the environmental performance of land eruption is better than that of underwater eruption.