准噶尔盆地陆东地区石炭系火山岩储层特征及控制因素

摘要

The reservoir characteristics including lithology, lithofacies, pore type of the carboniferous volcanic rocks in Ludong area of Junggar Basin are analyzed based upon core observation, thin section identification, porosity and permeability analysis, whole rock chemical analysis and scanning electron microscope analysis. The reservoir pore space types, main parameters affecting the reservoir quality are also studied. The results indicate that the major rocks includes sub-volcanic rock, lava, pyroclastic rocks and sedimentary pyroclastic rocks. The man reservoir spaces including secondary pores and fractures. And the reservoir properties are mainly affected by weathering and secondary solution, tectonism, lithology and lithofacies, environment of formation.%在岩心观察基础上,通过大量常规薄片与铸体薄片显微镜下鉴定与定量统计,孔隙度与渗透率测定、全岩主微量元素分析、扫描电镜等分析测试手段,对我国准噶尔盆地陆东地区石炭系火山岩的岩性与岩相特征、储集空间类型及分布特征进行了研究,在此基础上对陆东地区石炭系火山岩储层物性的影响因素进行了分析.研究结果表明:区内火山岩岩石类型主要为次火山岩、火山熔岩、火山碎屑岩和沉积火山碎屑岩.火山岩储集空间主要为次生溶孔和裂缝；火山岩的储集性能主要受风化和构造破碎作用、岩性和岩相以及火山喷发时的地质环境的影响.