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作 者:降文萍 柴建禄 张群 张培河 姜在炳 JIANG Wenping;CHAI Jianlu;ZHANG Qun;ZHANG Peihe;JIANG Zaibing(Xi’an Research Institute Co.,Ltd.,China Coal Technology&Engineering Group Corp.,Xi’an 710077,China)
机构地区:[1]中煤科工西安研究院(集团)有限公司,陕西西安710077
出 处:《煤炭科学技术》2022年第12期50-61,共12页Coal Science and Technology
基 金:国家科技重大专项资助项目(2011ZX05040,2016ZX05045-002);国家自然科学基金面上资助项目(41972167)。
摘 要:煤矿区煤层气地面抽采具有煤炭安全开采效率高、清洁利用煤层气资源和减少瓦斯大气排放的多重效应,其煤层气产量多年来占了全国总量的主要比例。“十一五”至“十三五”期间,依托国家油气重大专项,基于煤层气与煤炭协调开发的指导理念,研究了煤矿区地面煤层气抽采工程部署的特点及存在问题,按照受煤炭采动影响与否将煤矿区煤层气地面抽采分为预抽和采动抽采2种类型,在对两种抽采类型的抽采对象、可抽采时间和空间特征研究基础上,分别总结形成了煤层气地面预抽和采动抽采的工程部署方法体系。结合原始条件下煤层气开发模拟技术现状分析,梳理了煤矿区煤层气地面预抽模拟技术体系;在采动抽采技术特点及关键储层参数变化规律的研究基础上,基于渗透性控制气体运移规律的认识,提出了采动抽采效果预测模拟方法。根据煤矿区地面抽采具有安全效应特征,提出了煤矿区地面煤层气抽采间接经济效益的评价指标,即地面抽采前矿井瓦斯灾害治理费用与地面抽采后矿井瓦斯灾害治理费用的差值,并建立了包含预抽和采动抽采的比较全面的地面煤层气抽采工程经济性评价方法。煤矿区地面抽采工程部署及相关技术是预判煤矿区地面煤层气低成本高回报效果、煤层气与煤炭资源协调开发的关键手段,建议在煤矿区进一步推广应用。The surface extraction of CBM in coal mine area has the multiple effects of improving the efficiency of safe coal mining,using CBM resource cleanly and reducing gas emission.From the 11th five-year plan to the 13th five-year plan period,based on the national major oil and gas projects in coal mining areas,and based on the guiding principle of coordinated development of CBM and coal in coal mining areas,the characteristics and existing problems of surface CBM extraction and deployment in coal mining areas were studied,according to the influence of coal mining,the surface extraction of CBM in coal mining area is divided into two types:pre-extraction and mining extraction.Based on the study of the objects,time and space characteristics of the two kinds of extraction methods,the engineering deployment systems of ground pre-extraction and mining extraction are summarized respectively.Based on the analysis of the present situation of CBM development technology in non-coal mining areas,the technology system of CBM surface pre-extraction in coal mining areas is sorted out,and the characteristics of CBM extraction technology and the variation regularity of key reservoir parameters are studied based on the understanding of gas migration law of permeability control,the extraction simulation and prediction method of mining is formed.According to the safety effect of surface extraction in coal mining area,the evaluation index of indirect economic benefit of surface drainage in coal mining area is put forward,which is the difference between the cost of gas disaster treatment before surface extraction and the cost of gas disaster treatment after surface extraction,a comprehensive economic evaluation method for CBM surface extraction engineering is established.The surface extraction project deployment and related technology are the key means to predict the low-cost and high-return effect of surface CBM and the coordinated development of CBM and coal resources in coal mining area.
关 键 词:煤矿区 煤层气 协调开发 地面抽采 工程部署 模拟预测 经济评价
分 类 号:TD712.6[矿业工程—矿井通风与安全]
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