黔西阿弓向斜北翼主采煤层孔隙结构特征研究  

Research on the Pore Structure Characteristics of the Main Coal Seam in the North Flank of the Agong'Synclinal Coal Reservoir in Qianxi

作　　者：李荣雷 冯云飞 韩明辉 LI Ronglei;FENG Yunfei;HAN Minghui(Guizhou Engineering Technology Research Center for Coalbed Methane and Shale Gas,Guiyang,Guizhou Province,550081 China)

机构地区：[1]贵州省煤层气页岩气工程技术研究中心,贵州贵阳550081

出　　处：《科技资讯》2024年第7期203-205,209,共4页Science & Technology Information

基　　金：贵州省科技计划项目“贵州省煤层气(煤矿瓦斯)抽采提产增效关键技术及工程试验”(黔科合战略找矿[2022]ZD001);贵州省科技计划项目“贵州省煤层气地质工程一体化研究科技创新人才团队”(黔科合平台人才CXTD[2022]016)。

摘　　要：为研究黔西织纳煤田阿弓向斜煤储层孔隙结构特征,指导该区煤层气开发和煤矿瓦斯抽采,对研究区施工的煤层气参数井DJT1井主采煤层煤样做了压汞、煤岩鉴定等相关实验;结合实验数据分析了煤层中孔隙特征与孔隙表征参数的变化规律,探讨了该区孔隙特征的地质控制因素。结果表明:孔隙形态以开放孔为主,含一定数量的半封闭孔。总孔容在0.0225~0.0331 mL/g,小孔所占比例最高,其次是微孔。孔隙率和孔容随煤变质程度增加呈现递减变化。煤岩显微组分镜质组含量普遍超过55%,控制了微孔和小孔的含量,而矿物质含量的增加总体上对孔隙发育产生不利影响。In order to study the pore structure characteristics of the Agong'synclinal coal reservoir of the Zhijin-Nayong Coalfield in Qianxi to guide the development of coal-bed methane and the extraction of coal mine gas in this area,relevant tests such as mercury intrusion and coal rock identification have been carried out on coal samples from the main coal seam of Well DJT1,a coal-bed methane parameter well,constructed in the research area,the change laws of the porosity characteristics and pore characterization parameters in the coal seam have been analyzed in combination with test data,and the geologic control factors of the porosity characteristics in this area have been explored.The results show that the pore morphology is dominated by open pores,with a certain number of semi-closed pores,that the total pore volume ranges from 0.0225 to 0.0331 mL/g,with the highest proportion of small pores,followed by micropores,that the porosity and pore volume decrease with the increase of the degree of coal metamorphism,and that the content of the maceral vitrinite of coal petrography generally exceeds 55%,which controls the content of micropores and small pores,while the increase of mineral content generally has a negative impact on the development of pores.

关 键 词：阿弓向斜 主采煤层 孔隙特征 压汞实验 

分 类 号：TE31[石油与天然气工程—油气田开发工程] P618.13[天文地球—矿床学]