井下煤层水力压裂理论与技术研究现状及发展方向  

Research status and development direction of theory and technology of hydraulic fracturing for underground coal seam

作　　者：覃木广[1,2] QIN Muguang(State Key Laboratory of the Gas Disaster Detecting,Preventing and Emergency Controlling,Chongqing 400037,China;China Coal Technology and Engineering Group Chongqing Research Institute,Chongqing 400037,China)

机构地区：[1]瓦斯灾害监控与应急技术国家重点实验室,重庆400037 [2]中煤科工集团重庆研究院有限公司,重庆400037

出　　处：《中国矿业》2021年第6期112-119,共8页China Mining Magazine

基　　金：国家重点研发计划资助项目资助(编号:2018YFC0808305)。

摘　　要：煤矿瓦斯治理的关键是解决煤层低渗透率的难题,而水力压裂增透技术是解决该问题的有效途径。基于国内外学者水力压裂研究成果,对井下煤层水力压裂理论、工艺技术以及压裂设备的研究现状进行了系统的梳理,详细分析了水力压裂理论的裂隙扩展规律与模型研究进展,以及压裂工艺中较为先进的定向水力压裂技术、脉动水力压裂技术以及缝网压裂技术,并指出了井下煤层水力压裂技术的发展方向:进行多手段的水力压裂基础理论研究;开发多元化及适合各类煤层的水力压裂技术;实现水力压裂装备一体化和智能化。这些方向的研究对于水力压裂技术的发展具有一定的借鉴意义。The key of gas control is to solve the problem of low permeability of coal seam,and hydraulic fracturing technology is an effective way to solve the problem.Based on the research results of domestic and foreign scholars on hydraulic fracturing,this paper combs the research status of underground coal seam hydraulic fracturing theory,process technology and fracturing equipment,analyzes the research progress of fracture propagation law and model of hydraulic fracturing theory,as well as the more advanced directional hydraulic fracturing technology,pulsating hydraulic fracturing and fracture network fracturing technology.The development direction of hydraulic fracturing technology in coal seam is pointed out:the basic theory of hydraulic fracturing need to study by many means;diversified hydraulic fracturing technology suitable for all kinds of coal seams need to develop;the integration and intellectualization of hydraulic fracturing equipment need to achieve.It has a certain reference significance for the development of hydraulic fracturing technology.

关 键 词：煤层 渗透率 水力压裂 增透 发展方向 

分 类 号：TD713[矿业工程—矿井通风与安全]