摘要
为了定量表征沁水盆地南部山西组3#煤层和太原组15#煤层孔隙结构的差异性,采用压汞试验和Q型主因子分析的方法对煤储层孔隙结构特征进行了研究。结果表明:研究区煤储层孔隙度较小,孔隙类型以微孔及小孔占优,不同煤样所测得孔隙结构参数具有较大的差异;由样本总得分将煤储层划分为3种类型:Ⅰ类储层压汞曲线滞后环较大、孔隙连通性较好,Ⅲ类储层进退汞曲线几乎重合、半封闭型孔隙含量较高,Ⅱ类储层居中;通过分析对比,研究区主力产层3#煤层以Ⅱ类储层为主,15#煤层主要为Ⅲ类储层。
To quantitatively characterize the differentiation of pore geometry between pores from Shanxi Formation coal No. 3 and Taiyu?an Formation coal No.15 in southern Qinshui Basin, using mercury intrusion and Q-model principal factor analysis carried out research on coal reservoir pore geometry characteristics. The result has shown that coal reservoir porosity is rather small, pore type is micro and small pores dominated, and pore geometry parameters from different coal samples have significant differences. Based on sample total scores divided coal reservoir into three categories: Type I coal reservoir mercury intrusion curves have larger hysteresis loop, better pore connectivity; Type III mercury injection and withdrawal curves are almost coincided, more semi-closed pores; while Type II is placed in the middle. Through contrastive analysis, the principal producing layer coal No.3 in the area belongs mostly Type II, coal No.15 mostly Type III.
出处
《中国煤炭地质》
2015年第6期18-21 39,39,共5页
Coal Geology of China
基金
国家科技重大专项(2011ZX05042-001-002)
国家重点基础研究发展规划项目(2014CB238900)
关键词
Q型主因子分析
样本得分
孔隙度
煤储层类型
孔隙结构
沁水盆地
Q-model principal factor analysis
sample scores
porosity
coal reservoir type
pore geometry
Qinshui Basin
