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
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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。Abstract: 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.
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Keywords:
- roof /
- virtual reservoir /
- hydraulic fracturing /
- fissure /
- physical simulation /
- improving permeability /
- gas seepage
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[1] 林柏泉.矿井瓦斯防治理论与技术[M].徐州:中国矿业大学出版社,2010. [2] 蔡峰,刘泽功.深部低透气性煤层上向穿层水力压裂强化增透技术[J].煤炭学报,2016,41(1):113-119. [3] 段康廉,冯增朝,赵阳升,等.低渗透煤层钻孔与水力割缝瓦斯排放的实验研究[J].煤炭学报,2002,27(1):50-53. [4] 刘泽功,蔡峰,肖应祺.煤层深孔预裂爆破卸压增透效果数值模拟分析[J].安徽理工大学学报,2008,28(4):17-20. [5] 王志军,连传杰,王阁.岩石定向水力压裂导控的数值分析[J].岩土工程学报,2013,35(S2):320-324. [6] 屈平.单一松软煤层顶板压裂增透的数值模拟分析[J].中州煤炭,2016(2):45-48. [7] 马耕,陶云奇.煤矿井下水力扰动抽采瓦斯技术体系[J].煤炭科学技术,2016,44(1):29-38. [8] 付江伟,王公忠,李鹏,等.顶板水力致裂抽采瓦斯技术研究[J].中国安全科学学报,2016,26(1):109. [9] 李冰,宋志敏,任建刚.软煤顶板水力压裂措施瓦斯运移机理[J].辽宁工程技术大学学报,2014(3):317. [10] 冯文军,苏现波,王建伟,等.“三软”单一煤层水力冲孔卸压增透机理及现场试验[J].煤田地质与勘探,2015(1):100-103. [11] 葛林,高建良,李炫烨.煤层顶板水平长钻孔布置高度对抽采效果的影响[J].矿业工程研究,2016(1):34-40. [12] 刘东,许江,尹光志,等.多场耦合煤层气开采物理模拟试验系统的研制和应用[J].岩石力学与工程学报,2014,33(S2):3505-3514. [13] 冷雪峰,唐春安,杨天鸿,等.岩石水压致裂过程的数值模拟分析[J].东北大学学报(自然科学版),2002,23(11):1104-1107.
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