岩矿测试2016，Vol.35Issue(6)：603-611,9.DOI:10.15898/j.cnki.11-2131/td.2016.06.006
比表面积氮气吸附法在蒙脱石碱性溶蚀表征中的应用
Application of Specific Surface Area Nitrogen Adsorption Method to Characterize the Alkaline Dissolution of Montmorillonite
摘要
Abstract
Montmorillonite is characterized by small particle size,large specific surface area and strong water sensitivity,which results in blocking the pore and throat of the reservoir and in turn affecting its quality.Dissolution characteristics of montmorillonite under alkaline conditions are common concerns in the development of oil fields. Mass contrast,X-ray Diffraction,solution concentration analysis and value analysis of pH methods are commonly used to characterize dissolution of montmorillonite. However, the quality comparison method is complex. Calculation of diffraction pattern by the X-ray Diffraction involves large manual operation errors. The ion concentration analysis method shows a large detection error for infusible elements.Value analysis of the pH method is influenced by temperature changes.The specific surface area,pore volume,pore diameter change,adsorption-desorption curve measured by nitrogen adsorption method was used to characterize the dissolution of montmorillonite under alkaline conditions and is reported in this paper.The experimental conditions were optimized,including the concentration of NaOH solution and filling time (reaction time).The best concentration of NaOH solution was 0.05 mol/L and the best reaction time was 3 h.Results show that the dissolved results of montmorillonite by the nitrogen adsorption method characterized by specific surface area,pore volume,pore diameter and adsorption desorption curve are consistent with the results by the change of the pH value and the concentration of the solution (such as Si4+).Therefore,the method is feasible and can be used to characterize the dissolution of minerals with multiple pores and large specific surface area.关键词
比表面积氮气吸附法/比表面积特征/孔径特征/溶蚀特征/氢氧化钠溶液Key words
specific surface area-nitrogen adsorption method/specific surface area characteristics/pore size characteristics/dissolution characteristics/NaOH solution分类
天文与地球科学引用本文复制引用
刘珍,曲希玉,王伟庆,林永昌,高媛..比表面积氮气吸附法在蒙脱石碱性溶蚀表征中的应用[J].岩矿测试,2016,35(6):603-611,9.基金项目
国家自然科学基金资助项目（41372133）；中石化科技重点攻关项目 （）
