[1]文 虎,樊世星,马 砺,等.低渗透性煤层井下低压液态CO2促抽瓦斯工程实践[J].西安科技大学学报,2018,(04):530-537.[doi:10.13800/j.cnki.xakjdxxb.2018.0403 ]
 WEN Hu,FAN Shi-xing,MA Li,et al.A case study of methane drainage promotion by injecting liquid carbon dioxide into low permeability coal seam[J].Journal of Xi'an University of Science and Technology,2018,(04):530-537.[doi:10.13800/j.cnki.xakjdxxb.2018.0403 ]
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低渗透性煤层井下低压液态CO2促抽瓦斯工程实践(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2018年04期
页码:
530-537
栏目:
出版日期:
2018-07-15

文章信息/Info

Title:
A case study of methane drainage promotion by injecting liquid carbon dioxide into low permeability coal seam
文章编号:
1672-9315(2018)04-0530-08
作者:
文 虎12樊世星12马 砺12郭 军12魏高明12郝健池12
1.西安科技大学 安全科学与工程学院,陕西 西安 710054; 2.西安科技大学 西部矿井开采及灾害防治教育部重点实验室,陕西 西安 710054
Author(s):
WEN Hu12FAN Shi-xing12MA LiGUO Jun12WEI Gao-ming12HAO Jian-chi12
(1.College of Safety Science and Engineering,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an 710054,China)
关键词:
低渗透性煤层 低压 液态CO2 煤层增渗 瓦斯抽采
Keywords:
low permeability coal seam low pressure liquid carbon dioxide permeability enhancement gas extraction
分类号:
TD 752
DOI:
10.13800/j.cnki.xakjdxxb.2018.0403
文献标志码:
A
摘要:
针对韩城矿区3#煤层渗透率较低,瓦斯抽采难度大、抽采效率低等难题,在理论分析液态CO2低温相变增渗和驱替置换煤层瓦斯机理的基础上,提出了低压(2~3 MPa)液态CO2顺层钻孔压注增透技术,研发了适用于煤矿井下的低压液态CO2压注系统和工艺,确定了压注过程的关键参数。桑树坪2号井3#煤层工业性试验结果表明:整个CO2压注过程大致可分为相态平衡建立、注液和保压3个阶段; 液态CO2在3#煤层中的渗流扩散半径超过18 m,此半径范围内瓦斯抽采浓度整体得到提高,抽采活跃期至少一个月。距压注孔6,12和18 m的抽采孔单孔瓦斯浓度平均值分别达41.66%,35.43%和24.14%,且随距压注孔间隔的增大,单孔瓦斯抽采浓度呈逐渐减小趋势,与钻孔内CO2浓度变化趋势一致。整个抽采活跃期内,支管平均瓦斯抽采浓度和纯量分别达48.49%和1.42 m3/min,明显高于水力割缝后的瓦斯抽采效果,压注后32~40 d,衰减至29.37%和0.88 m3/min,仍高于原始煤层瓦斯抽采浓度。
Abstract:
In light of the problems of poor permeability,difficult gas extraction and low extraction efficiency of No.3 coal seam in Hancheng Mining Area,the theoretical analysis was carried out to investigate the mechanism on liquid CO2 promoting methane drainage.The phase transformation and methane displacement of liquid CO2 played an important role in promoting methane extraction.Thus,a novel methane control technology namely liquid CO2 injection has been proposed,and a set of equipment and technology of liquid CO2 injection were developed.Moreover,the key parameters of the liquid CO2 injection was determined by the field practice.The field extraction test indicated that the entire process of CO2 injection can be roughly divided into 3 stages:phase equilibrium,liquid injection and pressure maintenance.The seepage diffusion radius of CO2 in No.3 coal seam reaches 18m and the active period of gas drainage lasts at least one month.The average gas concentration of single-hole with 6,12 and 18 m away from the injection hole was 41.66%,35.43% and 24.14%,respectively.And with the increase of the distance between the extraction and injection hole,the single-hole gas drainage concentration gradually decreased,which was consistent with the variation trend of CO2 concentration in the boreholes.During the whole active extraction period,the average gas drainage concentration and the amount of methane extraction of the branch pipe reached 48.49% and 1.42 m3/min,respectively,which are obviously higher than that of hydraulic fracturing.Whereas,after the CO2 injection for 32~40 days,the average gas concentration and the amount of single borehole decreased to 29.37% and 0.88m3/min,which is still higher than gas drainage concentration in the original coal seam.

参考文献/References:

[1] Liang Y.Control of coal and gas outbursts in Huainan mines in China:A review[J].Journal of Rock Mechanics and Geotechnical Engineering,2016,8(4):559-567. [2] 袁 亮.我国深部煤与瓦斯共采战略思考[J].煤炭学报,2016,41(1):1-6. YUAN Liang.Strategic thinking of simultaneous exploitation of coal and gas in deep mining[J].Journal of China Coal Society,2016,41(1):1-6. [3] 马海峰,程志恒,曹家明.千米深井高瓦斯煤层W-S-W水力压裂强化增透试验研究[J].煤炭学报,2017,42(7):1757-1764. MA Hai-feng,CHENG Zhi-heng,CAO Jia-ming.Intensive permeability enhancement experiment through hydraulic fracturing by way of water-sand-water in kilometer deep well with high gas seam[J].Journal of China Coal Society,2017,42(7):1757-1764. [4] ZHOU Fu-bao,XIA Tong-qiang,WANG Xin-xin,et al.Recent developments in coal mine methane extraction and utilization in China:A review[J].Journal of Natural Gas Science and Engineering,2016,31:437-458. [5] Lu P,Li P,Chen J,et al.Gas drainage from different mine areas:optimal placement of drainage systems for deep coal seams with high gas emissions[J].International Journal of Coal Science and Technology,2015,2(1):84-90. [6] 李宗福,孙大发,陈久福,等.水力压裂-水力割缝联合增透技术应用[J].煤炭科学技术,2015,43(10):72-76. LI Zong-fu,SUN Da-fa,CHEN Jiu-fu,et al.Application of permeability improving technology combined with hydraulic pressure fracturing and hydraulic slotting[J].Coal Science and Technology,2015,43(10):72-76. [7] 曹运兴,张军胜,田 林,等.低渗煤层定向多簇气相压裂瓦斯治理技术研究与实践[J].煤炭学报,2017,42(10):2631-2641. CAO Yun-xing,ZHANG Jun-sheng,TIAN Lin,et al.Research and application of CO2 gas fracturing for gas control in low permeability coal seams[J].Journal of China Coal Society,2017,42(10):2631-2641. [8] 康红普,冯彦军.定向水力压裂工作面煤体应力监测及其演化规律[J].煤炭学报,2012,37(12):1953-1959. KANG Hong-pu,FENG Yan-jun.Monitoring of stress change in coal seam caused by directional hydraulic fracturing in working face with strong roof and its evolution[J].Journal of China Coal Society,2012,37(12):1953-1959. [9]李晓红,王晓川,康 勇,等.煤层水力割缝系统过渡过程能量特性与耗散[J].煤炭学报,2014,39(8):1404-1408. LI Xiao-hong,WANG Xiao-chuan,KANG Yong,et al.Energy characteristic and dissipation in transient process of hydraulic cutting seams system in coal seam[J].Journal of China Coal Society,2014,39(8):1404-1408. [10]王 凯,李 波,魏建平,等.水力冲孔钻孔周围煤层透气性变化规律[J].采矿与安全工程学报,2013,30(5):778-784. WANG Kai,LI Bo,WEI Jian-ping,et al.Change regulation of coal seam permeability around hydraulic flushing borehole[J].Journal of Mining & Safety Engineering,2013,30(5):778-784. [11]袁 亮,林柏泉,杨 威.我国煤矿水力化技术瓦斯治理研究进展及发展方向[J].煤炭科学技术,2015,43(1):45-49. YUAN Liang,LIN Bai-quan,YANG Wei.Research process and development direction of gas control with mine hydraulic technology in China coal mine[J].Coal Science and Technology,2015,43(1):45-49. [12]王春光,张东旭.深部煤矿开采瓦斯综合治理技术研究[J].煤炭科学技术,2013,41(8):11-14. WANG Chun-guang,ZHANG Dong-xu.Research on comprehensive gas control technology of deep coal mining[J].Coal Science and Technology,2013,43(8):11-14. [13]Cui X,Bustin R M,Dipple G.Selective transport of CO2,CH4,and N2,in coals:insights from modeling of experimental gas adsorption data[J].Fuel,2004,83(3):293-303. [14]马志宏,郭勇义,吴世跃.注入二氧化碳及氮气驱替煤层气机理的实验研究[J].太原理工大学学报,2001,32(4):335-338. MA Zhi-hong,GUO Yong-yi,WU Shi-yue.An experimental study of mechanism of exploiting coal-bed methane by injecting carbon dioxide or nitrogen[J].Journal of Taiyuan University of Technology,2001,32(4):335-338. [15]杨宏民,王兆丰,任子阳.煤中二元气体竞争吸附与置换解吸的差异性及其置换规律[J].煤炭学报,2015,40(7):1550-1554. YANG Hong-min,WANG Zhao-feng,REN Zi-yang.Differences between competitive adsorption and replacement desorption of binary gases in coal and its replacement laws[J].Journal of China Coal Society,2015,40(7):1550-1554. [16]黎 力,梁卫国,李治刚,等.注热CO2驱替增产煤层气试验研究[J].煤炭学报,2017,42(8):2044-2050. LI Li,LIANG Wei-guo,LI Zhi-gang,et al.Experimental investigation on enhancing coalbed methane recovery by injecting high temperature CO2[J].Journal of China Coal Society,2017,42(8):2044-2050. [17]岳立新,孙可明,郝志勇.超临界CO2提高煤层渗透性的增透规律研究[J].中国矿业大学学报,2014,43(2):319-324. YUE Li-xin,SUN Ke-ming,HAO Zhi-yong.Study on increased permeability law of coal seam by supercritical CO2[J].Journal of China University of Mining and Technology,2014,43(2):319-324. [18]Vishal V,Singh T N.A laboratory investigation of permeability of coal to supercritical CO2[J].Geotechnical and Geological Engineering,2015,33(4):1009-1016. [19]Zhou J,Hu N,Jiang Y,et al.Supercritical carbon dioxide fracturing in shale and the coupled effects on the permeability of fractured shale:An experimental study[J].Journal of Natural Gas Science and Engineering,2016,36:369-377. [20]王兆丰,孙小明,陆庭侃,等.液态CO2相变致裂强化瓦斯预抽试验研究[J].河南理工大学学报:自然科学版,2015,34(1):1-5. WANG Zhao-feng,SUN Xiao-ming,LU Ting-kai,et al.Experiment research on strengthening gas drainage effect with fracturing technique by liquid CO2 phase transition[J].Journal of Hennan Polytechnic University:Natural Science,2015,34(1):1-5. [21]周西华,门金龙,宋东平,等.煤层液态CO2爆破增透促抽瓦斯技术研究[J].中国安全科学学报,2015,25(2):60-65. ZHOU Xi-hua,MEN Jin-long,SONG Dong-ping,et al.Research on increasing coal seam permeability and promoting gas drainage with liquid CO2 blasting[J].China Safety Science Journal,2015,25(2):60-65. [22]杨兆中,张云鹏,贾 敏,等.低温对煤岩渗透性影响试验研究[J].岩土力学,2017,38(2):354-360. YANG Zhao-zhong,ZHANG Yun-peng,JIA Min,et al.Experimental research on influence of low temperature on coal permeability[J].Rock and Soil Mechanics,2017,38(2):354-360. [23]魏建平,孙刘涛,王登科,等.温度冲击作用下煤的渗透率变化规律与增透机制[J].煤炭学报,2017,42(8):1919-1925. WEI Jian-ping,SUN Liu-tao,WANG Deng-ke,et al.Change law of permeability of coal under temperature impact and the mechanism of increasing permeability[J].Journal of China Coal Society,2017,42(8):1919-1925. [24]秦跃平,刘 鹏,刘 伟,等.双重介质煤体钻孔瓦斯双渗流模型及数值解算[J].中国矿业大学学报,2016,45(6):1111-1117. QIN Yue-ping,LIU Peng,LIU Wei,et al.Modeling and numerical simulation of borehole methane flow in a dual-porosity,dual-permeability coal seam[J].Journal of China University of Mining and Technology,2016,45(6):1111-1117.

备注/Memo

备注/Memo:
收稿日期:2018-01-20 责任编辑:杨泉林
基金项目:国家重点研发计划重点专项(2016YFC0801802); 国家自然科学基金(51574193); 陕西省教育厅专项科学研究计划(17JK0495)
通信作者:文 虎(1972-),男,新疆石河子人,教授,博士生导师,E-mail:wenh@xust.edu.cn
更新日期/Last Update: 2018-08-29