摘要
选取鸡西城山煤矿现场实例,利用RFPA2D-Flow软件模拟了穿煤层钻孔定向水压致裂全过程.分析了应力、水压的分布与变化规律,研究了损伤区域、卸压区域的形成与扩展过程.对穿煤层钻孔定向水压致裂前后煤层瓦斯抽放过程中瓦斯抽放效果及压力分布进行了对比研究.结果表明,实施定向水压致裂后压裂孔与控制孔之间的卸压区成为主要的瓦斯渗流通道,使瓦斯抽放效果显著提高.
Selecting on-site case of Jixi Chengshan coal mine as an engineering example,RFPA2D-Flow software was used to simulate the entire process of the directional hydraulic fracturing through coal seam drilling hole.The distribution and change of stress and water pressure were analyzed,with the formation and expansion of the damage and pressure relief zones studied.The gas drainage effect and gas pressure distribution during the gas drainage were contrastively studied before/after directional hydraulic fracturing through coal seam drilling hole.The results showed that the pressure relief zone between fracturing hole and controlling hole is the main channel for gas seepage after implementing directional hydraulic fracturing,thus the gas drainage effect is improved significantly.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第10期1480-1483,共4页
Journal of Northeastern University(Natural Science)
基金
国家重点基础研究发展计划项目(2010CB735508)
国家大型油气田及煤层气开发科技重大专项(2011ZX05041)
中央高校基本科研业务费专项资金资助项目(N090101001
N090601003)
关键词
穿煤层钻孔
水压致裂
数值模拟
瓦斯抽放
through coal seam drilling hole
hydraulic fracturing
numerical simulation
drainage gas
