中国石油大学学报（自然科学版）Issue(5)：102-108,7.DOI:10.3969/j.issn.1673-5005.2014.05.014
压裂液处理对煤岩孔隙结构的影响
Effect of fracturing fluid treatment on pore structure of coal
摘要
Abstract
Fracturing fluid and the coal seam will touch each other during fracturing operation of coal. The developed micro-fractures and high capillary pressure of coal make it easy for fracturing fluid intrude into coal seam and therefore cause serious damage to the pore structure, which affects further the adsorption capacity of coal bed methane. Using the NO. 9 coal sample from Ningwu Basin and three fracturing fluid samples on site, the characterization of pore structure of coal, which was treated with fracturing fluid, was analyzed with nitrogen adsorption method. Combined with the analysis results of scanning electron mi-croscopy ( SEM) , the influence of different fracturing fluid on pore structure of coal was investigated. Methane isothermal ad-sorption experiments were also carried out using the treated coal. The results show that pore size distribution, specific surface area and pore fractal dimension of coal change after treated by fracturing fluid. The results also indicate that gel fracturing fluid has the most impact on pore structure of coal, followed by activated water fracturing fluid, and clean fracturing fluid having the least. The larger the increase of specific surface area and pore fractal dimension of coal treated by fracturing fluid, the stronger its ability of methane adsorption. Therefore, the change of pore structure in coal will change its adsorption ability of methane.关键词
煤层气/压裂液/孔隙结构/氮气吸附/等温吸附Key words
coalbed methane/fracturing fluid/pore structure/nitrogen adsorption/isothermal adsorption分类
天文与地球科学引用本文复制引用
康毅力,陈德飞,李相臣..压裂液处理对煤岩孔隙结构的影响[J].中国石油大学学报（自然科学版）,2014,(5):102-108,7.基金项目
国家“973”计划课题(2010CB226705) （2010CB226705）
国家科技重大专项(2011ZX05005-006-008HZ) （2011ZX05005-006-008HZ）
