顶板虚拟储层水力压裂物理模拟试验  

Physical Simulation Experiment of Hydraulic Fracturing for Virtual Reservoir in Roof

作　　者：马耕 冯丹[2] 陶云奇 许江[2] 彭守建[2] 

机构地区：[1]河南能源化工集团研究院有限公司,河南郑州450046 [2]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044

出　　处：《煤矿安全》2018年第2期1-4,共4页Safety in Coal Mines

基　　金：国家科技重大专项资助项目(2016ZX05044);河南省创新型科技人才队伍建设工程资助项目(164100510024);国家自然科学基金重点资助项目(51434003)

摘　　要：针对单一低渗松软煤层,采取顶板虚拟储层水力压裂的方式可实现煤层增透。利用多场耦合煤层气开采物理模拟试验系统,开展了顶板虚拟储层水力压裂物理模拟试验。试验结果表明:通过在顶板及煤层中布置压力传感器,可以较好地监测水力压裂过程中煤层及顶板虚拟储层中裂缝的开裂扩展演化过程;顶板虚拟储层水力压裂一方面对煤层产生卸压作用,另一方面压裂裂缝沿钻孔向煤层方向扩展并形成裂隙缝网,煤层瓦斯可通过裂隙缝网扩展至顶板虚拟储层钻孔,增加了瓦斯渗流通道,有效提高了煤层瓦斯抽采效率。For the single low permeability soft coal seam, an improved experiment on technology of fracturing roof was performed.It can improve the ability of permeability by using hydraulic fracture in the roof. The physical simulation experiment for roof hydraulic fracturing virtual reservoir was carried out by multi-field coupling of coalbed methane exploitation system in this paper.The experimental results show that： it can better monitoring hydraulic fracturing fissures through the water pressure sensor in the roof and coal seam; the hydraulic fracturing of the virtual reservoir on the roof has the effect of releasing the gas pressure on the coal seam, on the other hand, the fracturing cracks spread along the borehole toward the coal seam and forms the cracks network.The coal seam gas can be extended through fissures network to the floor virtual reservoir drilling, which can effectively increase gas seepage channel and the gas extraction efficiency.

关 键 词：顶板 虚拟储层 水力压裂 裂缝 物理模拟 煤层增透 瓦斯渗流 

分 类 号：TD713[矿业工程—矿井通风与安全]