准噶尔盆地陆东地区石炭系火山岩岩性岩相及其对储层物性的影响

通过大量的岩心观察,室内常规薄片与铸体薄片显微镜下鉴定与定量统计,结合孔隙度与渗透率测定、全岩主微量元素分析等测试手段,对我国准噶尔盆地陆东地区石炭系火山岩的岩性特征、岩相、储集空间类型进行了研究,在此基础上对陆东地区石炭系火山岩储层的岩性岩相特征对储集性能的影响做了深入的研究,整体研究结果显示: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;次火山岩相和爆发相的储层具有较好的储集性能,其次为溢流相储层,火山沉积相中凝灰岩储层储集性能良好。

Relationship between the characteristic of lithology-lithofacies and reservoir physical property in carboniferous volcanic reservoir in ludong area of Junggar basin

The reservoir characteristics includin g 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 and whole rock chemical analysis.Relationship between the Characteristic of Lithology -lithofacies and reservoir physical property are also studied.The results indicate that the major rocks includes sub -volcanic rock,lava,pyroclastic rocks and sedimentary pyroclastic rocks.The main reservoir spaces including secondary pores and fractures.Statistics show that sub - volcanic facies and explosive facies serve a better reservoir than overflow reservoir,and the tuff in explosive facies serve a good reservoir too.