摘要
从微观储集层研究的角度出发,对三塘湖盆地马朗凹陷上石炭统卡拉岗组(C_2k)火山岩储层微观特征进行系统深入的分析研究,分析认为岩石类型以玄武岩为主,其次为安山岩和火山碎屑岩;火山岩储层基本属特低孔、特低渗储层,充填作用严重影响储层储集性能,交代蚀变作用对储层不利;风化淋滤作用、溶解作用和机械破碎作用对储层物性起到明显的改善作用;火成岩储集空间类型可分孔隙和裂缝两部分。储集空间组合类型可划分为气孔-溶洞组合、气孔-溶洞-裂缝组合、裂缝组合三类;杏仁、玻璃质含量越高,储层物性越好;斑晶含量与孔隙度大小呈反相关。
Microcosmic characteristics of Upper Carboniferous lava reservoir of Kalagang formation in Malang Sag in Santanghu basin has been systematically and further analyzed from the perspective of micro-reservoir study. It is thought that rock types are dominated by the basalt, followed by andesite and volcanoclastic rock. Volcanic reservoir belongs to ultra-low porosity and ultra-low permeability reservoir. Infilling seriously affects reservoir storage capacity. Metasomatie alteration is disadvantage to reservoir. Weathering and eluviation, dissolution mechanisms, and mechanical crashing effect can obviously improve physical property of reservoir. Reservoir space type of igneous rocks can be divided into two parts, pore and fracture. Reservoir space grouping type can be divided into three types, air pore and cave group, air pore and cave and fracture group and fracture group. The higher almond and vitreous contents are, the better reservoir physical property is. There is inversion correlation between phenocrysts content and porosity.
出处
《吐哈油气》
2008年第3期246-250,273,共6页
Tuha Oil & Gas
关键词
马朗凹陷
火山岩
微观特征
成岩作用
储集空间
影响因素
Malang sag
volcanic rock
microcosmic characteristics
diagenesis
reservoir space
influencing factors
