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详细分析了新疆三塘湖盆地牛东区块晚石炭世—二叠纪火山岩岩石类型、岩相及储层发育特征。岩石类型主要有火山碎屑岩、火山熔岩。火山碎屑岩包括凝灰岩、火山角砾岩以及火山集块岩;火山熔岩包括玄武岩、玄武安山岩。不同岩性在纵向上具有明显的韵律性,气孔玄武岩、玄武安山岩多分布于熔岩流单元的顶板和底板,中上部为杏仁玄武岩、杏仁玄武安山岩过渡带,中部及中下部为致密熔岩。顶板气孔-杏仁熔岩带和底板气孔-杏仁熔岩带原生气孔发育,气孔之间通过构造裂缝连通,是储层物性最好的岩相带之一。
The rock types, lithofacies and reservoir development characteristics of the Late Carboniferous-Permian volcanic rocks in Niu Dong block, Santanghu Basin, Xinjiang were analyzed in detail. Rock types are pyroclastic rocks, volcanic lava. Pyroclastic rocks include tuffs, volcanic breccias and volcanic rocks; volcanic lavas include basalt and basaltic andesite. Different lithologies have obvious rhythmicity in the longitudinal direction. Porous basalts and basaltic andesite are mostly distributed in the roof and floor of lava flow units. Alkaline basalts and almond basalts andesite transitional zone are in the middle and upper part, and dense lava in the middle and lower part. The stomata of the top plate-almond lava zone and the stomata of the bottom plate-almond lava zone are well developed. The stomata are interconnected by structural fractures and are one of the lithofacies belonged to the best reservoir property.