多组分酸酸化对中马村矿高阶煤增透效果的影响  

Influence of multi-component acid acidification on anti-reflection effect of high-rank coal in Zhongmacun Mine

作　　者：高建良[1,2,3] 方迎香 刘佳佳[1,2,3] 卢方超 胡建敏 GAO Jian-liang;FANG Ying-xiang;LIU Jia-jia;LU Fang-chao;HU Jian-min(School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,Henan,China;Henan Collaborative Innovation Center of Coal work Safety and Cleanefficiency Utilization,Henan Polytechnic University,Jiaozuo 454003,Henan,China;Henan Provincial Key Laboratory of Gas Geology and Gas Control—Provincial and Ministry of State Key Laboratory Breeding Base,Henan Polytechnic University,Jiaozuo 454003,Henan,China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454003 [2]河南理工大学煤炭安全生产与清洁高效利用省部共建协同创新中心,河南焦作454003 [3]河南理工大学河南省瓦斯地质与瓦斯治理重点实验室——省部共建国家重点实验室培育基地,河南焦作454003

出　　处：《安全与环境学报》2022年第6期3119-3126,共8页Journal of Safety and Environment

基　　金：国家自然科学基金项目(51734007,52074106);中国博士后基金项目(2019M652536);中原博士后创新人才项目(ZYQR201810171);河南省博士后科研项目(001801016)。

摘　　要：为了研究酸化对中马村矿煤储层渗透性的影响,用同一体系酸液的不同配方对中马村矿粉状煤样进行了溶蚀试验,并开展了饱水煤样酸化前后的核磁共振试验研究。结果表明:1)针对中马村矿高阶煤优选出的多组分酸最佳配方为质量分数6%HCl+质量分数3%CH_(3)COOH,质量分数2%KCl作为防膨剂,添加适量SDS协同酸化,酸液浸泡煤样最佳时间为24 h;2)经优选出的最佳酸液浸泡的6组煤样的t_(2)谱谱面积皆大于酸化前,酸化时间24 h时的煤样t_(2)谱谱面积约为酸化前谱面积的1.83倍;3)酸化前后煤样中水在各孔径上的比率表明,优选多组分酸溶蚀掉的矿物质主要存在于中马村矿煤样的小孔中。研究成果能为多组分酸对中马村矿低渗煤层酸化增透提供一定的理论基础。To study the influence of acidification on the permeability of coal reservoir in Zhongmacun Mine,the dissolution experiments of the powdery coal samples in Zhongmacun Mine were carried out with different formulas of the same system of the acid solution,and the nuclear magnetic resonance experiments of the water-saturated coal samples before and after acidification were carried out.The experimental results show that:(1)For the high-rank coal of Zhongmacun Mine,the optimal formula of multi-component acid is 6%HCl+3%CH_(3)COOH,2%KCl is used as an anti-swelling agent,and an appropriate amount of SDS is added for synergistic acidification.After soaking coal samples in the acid solution for 24 h,the dissolution rate of coal samples almost no longer increases,so in actual engineering applications,to save time and increase benefits,the best time is selected as 24 h;(2)The t_(2)spectrum area of the 6 groups of coal samples immersed in the optimal acid solution are all larger than before acidification.The t_(2)spectrum area of the coal sample at the acidification time of 24 h is about 1.83 times the spectrum area before acidification.This is due to the coal sample after acid treatment and it will dissolve the minerals in the pores to achieve the effect of acidification and antireflection;(3)The pore size distribution characteristics of coal samples before and after acidification in the Zhongmacun Mine indicate that the small pores are the most developed,the micropores are more developed,the mesopores are less developed,and the macropores are almost not developed.After acidification,the area of the left peak of the t_(2)spectrum of the coal sample increased significantly,that is,the water in the small pores of the coal sample increased significantly.It shows that most of the minerals in the small pores are eroded after acidification,which enhances the connectivity between the pores so that water can enter the small pores and be stored,indicating that the minerals eroded by the multi-component acid mainly exist in the small

关 键 词：安全工程 多组分酸 高阶煤 溶蚀率 配方优选 T2谱 酸化增透 

分 类 号：X936[环境科学与工程—安全科学]