煤层气矿井——一种新型的煤层气抽采方式

煤层气矿井是一种新型的煤层气抽采方式,本文介绍了煤层气矿井的技术思路及其应用于晋城矿区的方案,并对煤层气矿井的技术经济性进行了研究。

淮南矿区煤层气民用补充气源方案探讨

将矿井瓦斯作为淮南矿区居民民用燃气是矿井瓦斯利用的主要途径。针对淮南矿区煤层气产业化发展的需求,从互换性、安全性和实用性三方面对天然气混合气作为煤层气补充气源的可行性进行分析,指出天然气混合气与煤层气具有互换性,可作为补充气源,并提出了具体实施方案。

山西投资20．65亿建亚洲最大煤层气电厂

总投资达20．65亿元的山西煤层气综合开发项目计划，近日由国家发展和改革委员会正式批复下达。这个项目是我国目前规模最大的矿井煤层气开发利用工程，它的实施对山西综合利用煤层气、保护环境以及减少矿难发生都会产生深远意义。

从论文发表看国内外AMM开发现状及发展趋势

废弃矿井煤层气(AMM)开发兼具经济及环保效益,具有重要的研究意义。基于中国知网(CNKI)和Web of Science期刊核心合集数据库,系统地检索了关于AMM研究的相关文献,分析了200篇论文的分布特征,归纳了近20年国内外关于AMM的发展现状及研究内容,探讨了AMM的研究不足及发展趋势。研究结果表明:(1)国内外AMM论文数量总体呈现上升趋势,尤其是在中国近5年论文上升趋势明显,说明AMM研究逐渐成为国际研究热点;(2)中国AMM研究较多的科研院校为中国矿业大学,其次为煤炭科学研究总院西安分院,境外研究AMM较多国家为美国、波兰、德国、英国等国,研究机构较多的为波兰的AGH University of Science Technology;(3)20年来国内外主要研究方向为AMM资源潜力评估、AMM扰动储层描述及富集规律研究、开采技术优化、气体泄漏监测、气源成因探究等方面。通过综述国内外研究成果得出采空区煤层气多动态汇集于采空区上部裂隙带;废弃矿井资源量评估方法国外主要采用下降曲线法,国内主要基于物质平衡原理和资源叠加原理形成多种评估方法;国外主要研究方向多集中于甲烷成因来源、资源评估方法的改进以及环境评估监测。最后指出AMM生物成因气贡献的确定、AMM动态富集分布规律的认识、资源量估算模型方法改进,环境风险评估,AMM开发地质—工程—环境一体化评价体系的制定是今后的重要研究趋势。

Exploitation technology of pressure relief coalbed methane in vertical surface wells in the Huainan coal mining area

Exploitation technology of pressure relief coalbed methane in vertical surface wells is a new method for exploration of gas and coalbed methane exploitation in mining areas with high concentrations of gas, where tectonic coal developed. Studies on vertical surface well technology in the Huainan Coal Mining area play a role in demonstration in the use of clean, new energy resources, preventing and reducing coal mine gas accidents and protecting the environment. Based on the practice of gas drainage engineering of pressure relief coalbed methane in vertical surface wells and combined with relative geological and exploration en- gineering theories, the design principles of design and structure of wells of pressure relief coalbed methane in vertical surface wells are studied. The effects of extraction and their causes are discussed and the impact of geological conditions on gas production of the vertical surface wells are analyzed. The results indicate that in mining areas with high concentrations of gas, where tectonic coal developed, a success rate of pressure relief coalbed methane in surface vertical well is high and single well production usually great. But deformation due to coal exploitation could damage boreholes and cause breaks in the connection between aquifers and bore-holes, which could induce a decrease, even a complete halt in gas production of a single well. The design of well site location and wellbore configuration are the key for technology. The development of the geological conditions for coalbed methane have a significant effect on gas production of coalbed methane wells.