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[1]贾同千,饶孜,何庆兵,等.复杂地质低渗煤层水力压裂-割缝综合瓦斯增透技术研究[J].中国安全生产科学技术,2017,13(4):56-64.[doi:10.11731/j.issn.1673-193x.2017.04.010]
 JIA Tongqian,RAO Zi,HE Qingbing,et al.Research on comprehensive gas permeability improvement technology by hydraulic fracturing and slotting in coal seam with complex geological conditions and low permeability[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(4):56-64.[doi:10.11731/j.issn.1673-193x.2017.04.010]
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复杂地质低渗煤层水力压裂-割缝综合瓦斯增透技术研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年4期
页码:
56-64
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-04-30

文章信息/Info

Title:
Research on comprehensive gas permeability improvement technology by hydraulic fracturing and slotting in coal seam with complex geological conditions and low permeability
文章编号:
1673-193X(2017)-04-0059-06
作者:
贾同千1饶孜2何庆兵12宋润权2白鑫1
1.重庆大学 资源及环境科学学院,煤矿灾害动力学与控制国家重点实验室,重庆 400030 ;2.川煤集团芙蓉公司白皎煤矿,四川 珙县 644501
Author(s):
JIA Tongqian1 RAO Zi2 HE Qingbing12 SONG Runquan2 BAI Xin1
1. College of Resources and Environmental Sciences, State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400030, China;2. Baijiao Mine, Sichuan Coal Group Furong Company, Gongxian Sichuan 644501, China
关键词:
低渗煤层水力压裂-割缝综合增渗技术
Keywords:
coal seam with low permeability hydraulic fracturing and slotting comprehensive permeability improvement technology
分类号:
TD712
DOI:
10.11731/j.issn.1673-193x.2017.04.010
文献标志码:
A
摘要:
针对水力压裂区域化瓦斯增透盲区,提出了水力割缝局部化瓦斯增透技术措施,形成了复杂地质低渗煤层水力压裂-割缝综合瓦斯增透技术,并进行现场验证。研究结果表明:水力压裂区内的3个压裂钻孔平均瓦斯抽采纯流量较238底板道常规抽采钻孔单孔瓦斯抽采纯流量提高15.8倍,瓦斯抽采浓度提高4%,压裂区瓦斯抽采纯流量较对比区提高2.1倍,但水力压裂区域性措施受断层及煤层硬度等地质条件限制,存在盲区;水力割缝增透区内的抽采钻孔瓦斯浓度平均提高4.9倍,瓦斯纯流量平均提高3.3倍,对不同地质条件的适应性强,但是割缝影响范围小,抽采时效短;复杂地质低渗煤层水力压裂-割缝综合瓦斯增透技术综合了水力压裂与割缝的优点,对复杂地质煤层具有较强适应性,大幅提高了瓦斯治理水平。现场验证结果表明复杂地质低渗煤层水力压裂-割缝综合瓦斯增透技术在复杂地质条件下煤层强化抽采中有较好的实际应用价值。
Abstract:
Aiming at the problem of gas drainage in the coal seam with complex geological conditions and low permeability in Baijiao Coal Mine, the hydraulic fracturing technology was applied to carry out the regional gas permeability improvement, and its application effect was analyzed according to the situation of field gas drainage. Aiming at the blind area of regional gas permeability improvement by hydraulic fracturing, the technical measure of localized gas permeability improvement by hydraulic slotting was put forward, then the comprehensive gas permeability improvement technology by hydraulic fracturing and slotting in coal seam with complex geological conditions and low permeability was formed, and the field verification was conducted. The results showed that the average pure flow rate of gas drainage for three fracturing boreholes in the hydraulic fracturing zone increased by 15.8 times than that of regular single borehole gas drainage in 238 floor laneway, and the gas drainage concentration increased by 4%. The pure flow rate of gas drainage in the fractured area increased by 2.1 times than that of the comparison zone, but there existed the blind area by the regional measures of hydraulic fracturing due to the restriction of geological conditions such as fault and coal seam hardness. The gas concentration of drainage borehole in the hydraulic slotting permeability improvement zone increased by 4.9 times on the average, and the pure flow rate of gas increased by 3.3 times on the average. It has strong adaptability to different geological conditions, but the influence range of slotting is small, and the drainage time is short. The comprehensive gas permeability improvement technology by hydraulic fracturing and slotting in coal seam with complex geological conditions and low permeability integrates the advantages of hydraulic fracturing and slotting, and it has strong adaptability to coal seam with complex geological conditions, which improves the gas control level greatly. The field verification results showed that this technology has better practical application value for enhanced gas drainage in coal seam with complex geological conditions.

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相似文献/References:

[1]韩颖,宋德尚.低渗煤层高压水射流割缝增透技术试验研究[J].中国安全生产科学技术,2014,10(12):35.[doi:10.11731/j.issn.1673-193x.2014.12.006]
 HAN Ying,SONG De-shang.Experimental study on permeability improvement technology by cutting seam using high pressure water jet in coal seam with low permeability[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2014,10(4):35.[doi:10.11731/j.issn.1673-193x.2014.12.006]

备注/Memo

备注/Memo:
基金项目: 重庆市研究生科研创新项目(CYB16031)
更新日期/Last Update: 2017-05-11