Characteristics of Microcosmic Pore Structure in Tuffaceous Sandstone Reservoir
In order to understand the characteristics of tuffaceous sandstone reservoir further, we took the Beizhong area of Hailer Basin as an example to do some research on microcosmic pore structure and distribution patterns by using constant rate mercury penetration technology. The research indicates that pore radius is basically similar, while throat radius is absolutely different for cores of different permeability. The higher permeability is, the more widely throat distributes, and the higher the proportion of mid-coarse throat is. Compared with common sandstone cores with similar permeability, throat distribution curve has characteristics of lower peak value, wider distribution of throat and higher proportion of mid-coarse throat, which embody serious heterogeneity of tuffaceous sandstone. Although the contribution rate of micro-fine throat increases as increasing the permeability, the contribution rate of throat above micro-fine to permeability is far more than that of micro-fine throat. The study results offer theoretical guide for reservoir evaluation and efficient development of tuffaceous sandstone reservoir.
tuffaceous sandstone microcosmic pore structure constant rate mercury penetration reservoir evaluation
CUI Maolei YANG Zhengming
Institution of Porous Flow & Mechanics of Chinese Academy of Sciences, P.R.China, 065007 Graduate Sc Institution of Porous Flow & Mechanics of Chinese Academy of Sciences, P.R.China, 065007
国际会议
成都
英文
308-312
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）