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山西省废弃矿井煤层气地面钻井开发关键问题与对策

王争 李国富 周显俊 胡胜勇 李日富 陈文科 焦鹏帅 李超 李江彪

王争, 李国富, 周显俊, 胡胜勇, 李日富, 陈文科, 焦鹏帅, 李超, 李江彪. 山西省废弃矿井煤层气地面钻井开发关键问题与对策[J]. 煤田地质与勘探, 2021, 49(4): 86-95. doi: 10.3969/j.issn.1001-1986.2021.04.011
引用本文: 王争, 李国富, 周显俊, 胡胜勇, 李日富, 陈文科, 焦鹏帅, 李超, 李江彪. 山西省废弃矿井煤层气地面钻井开发关键问题与对策[J]. 煤田地质与勘探, 2021, 49(4): 86-95. doi: 10.3969/j.issn.1001-1986.2021.04.011
WANG Zheng, LI Guofu, ZHOU Xianjun, HU Shengyong, LI Rifu, CHEN Wenke, JIAO Pengshuai, LI Chao, LI Jiangbiao. Key problems and countermeasures of CBM development through surface boreholes in abandoned coal mines of Shanxi Province[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(4): 86-95. doi: 10.3969/j.issn.1001-1986.2021.04.011
Citation: WANG Zheng, LI Guofu, ZHOU Xianjun, HU Shengyong, LI Rifu, CHEN Wenke, JIAO Pengshuai, LI Chao, LI Jiangbiao. Key problems and countermeasures of CBM development through surface boreholes in abandoned coal mines of Shanxi Province[J]. COAL GEOLOGY & EXPLORATION, 2021, 49(4): 86-95. doi: 10.3969/j.issn.1001-1986.2021.04.011

山西省废弃矿井煤层气地面钻井开发关键问题与对策

doi: 10.3969/j.issn.1001-1986.2021.04.011
基金项目: 

山西省揭榜招标项目 20201101001

山西省科技重大专项项目 20201102001

山西省科技重大专项项目 20181101013

详细信息
    第一作者:

    王争,1986生,男,山东菏泽人,工程师,研究方向为煤层气开发与利用. E-mall:1836266331@qq.com

    通信作者:

    李国富,1965年生,男,山西晋城人,博士(后),正高级工程师,从事煤与煤层气共采理论与技术研究. E-mall:13834068216@qq.com

  • 中图分类号: TD712.6

Key problems and countermeasures of CBM development through surface boreholes in abandoned coal mines of Shanxi Province

  • 摘要: 随着我国煤炭去产能政策的有力实施,一批资源枯竭及产能落后矿井将陆续关停废弃。废弃矿井仍赋存着大量的煤层气资源,其开发利用是实现煤炭产业清洁安全高效低碳发展、促进煤矿安全生产、优化能源结构、实现温室气体减排等方面的重要举措。基于山西省煤基重点科技攻关(煤层气产业链)项目相关研究,系统阐述了废弃矿井煤层气开发面临着资源量评价不准、钻进体系不健全、井上下联合缺失等关键问题。针对这些问题提出以下几点对策:废弃矿井精准地质探测是采空区地面钻井轨迹设计的重要依据,尤其是炮采等落后采煤工艺的废弃矿井,地球物理勘探精度应达到米级才能有效降低钻遇煤柱风险;优选废弃矿井煤层气地面“L”型钻井思路,即选采空区周边一定距离的保安煤柱作为L型井位,并配套特殊钻进工艺;煤矿企业应将废弃矿井资源开发利用纳入煤矿全生命周期规划,尤其是矿井废弃前应确保煤层气抽采通道畅通,以实现煤层气井“一井多用”的新型井上下联合开采模式,提高废弃矿井煤层气开发效率;采用防回火、各种传感器等装置,并对关键参数设置自动报警停机界限值,从而使废弃矿井煤层气地面开采工艺安全、高效;对不同浓度废弃矿井煤层气,需要采取相应的梯级利用模式,从而提高整体开发利用价值。以山西省废弃矿井为示范区,研究认识对推动全国煤矿区废弃矿井煤层气开发利用具有重要的指导和示范意义。

     

  • 图  德国煤矿采空区预留管道

    注:右图中1—10为预留的管道或阀门。

    Fig. 1  Reserved pipeline in a coal mine goaf in Germany

    图  “L”型井身结构

    Fig. 2  Bore structure of "L" shaped boreholes

    图  山西省部分矿区煤层气梯级利用

    Fig. 3  Cascade utilization of coalbed methane in some mining areas of Shanxi Province

    图  晋城矿区某采空区井提纯系统

    Fig. 4  A purification system for methane from a goaf in Jincheng mining area

    图  晋城矿区某泵站直燃系统

    Fig. 5  Direct combustion system for a pumping station in Jincheng Mining Area

    图  山西省某矿区蓄热氧化系统

    Fig. 6  Regenerative thermal oxidizer in a mining area of Shanxi Province

    表  1  山西省7个矿区煤炭采空区煤层气资源量统计

    Table  1  Statistics of coalbed methane resources in goafs of seven mining areas in Shanxi Province

    矿区 煤组 总矿数 实际数据 推断数据 采空区煤层气量/
    亿m3
    矿数 矿区面积/
    km2
    采空区面积/km2 采空区占比/% 采空区煤层气量/亿m3 资源丰度/
    (亿m3·km–2)
    矿区面积/
    km2
    采空区面积/km2 采空区煤层气量/亿m3
    西山 上组煤 32 17 497.40 114.61 23 30.04 0.26 93.49 21.54 5.65 35.69
    下组煤 33 17 523.28 39.05 7 17.36 0.44 105.32 7.86 3.49 20.85
    武夏 上组煤 34 15 142.37 37.29 26 8.81 0.24 112.59 29.49 6.97 15.78
    下组煤 31 4 115.45 5.34 5 2.01 0.38 70.44 3.26 1.23 3.24
    潞安 上组煤 22 12 466.75 93.93 2 15.50 0.17 121.35 24.42 4.03 19.53
    下组煤 20 13 390.78 0.53 0 0.12 0.23 70.14 0.10 0.02 0.14
    离柳 上组煤 51 30 390.91 52.09 13 28.93 0.56 141.91 18.91 10.5 39.43
    下组煤 54 30 382.72 4.25 1 1.31 0.31 149.87 1.66 0.51 1.82
    霍东 上组煤 38 17 198.90 31.55 16 3.94 0.12 125.01 19.83 2.48 6.42
    下组煤 25 14 111.09 0.56 1 0.20 0.36 44.40 0.22 0.08 0.28
    阳泉北 上组煤 39 23 489.28 101.86 21 19.24 0.19 77.06 16.04 3.03 22.27
    下组煤 31 20 429.73 36.13 8 39.64 1.10 65.30 5.49 6.02 45.66
    阳泉南 下组煤 47 27 352.13 29.93 8 24.56 0.82 69.33 5.89 4.84 29.4
    晋城 上组煤 71 45 681.81 129.06 19 48.43 0.38 211.42 40.02 15.02 63.45
    下组煤 57 41 523.60 0 0 0 126.65 0 0 0
    合计 585 325 5 696.20 676.18 240.09 1 584.28 194.74 63.86 303.95
    下载: 导出CSV
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  • 收稿日期:  2020-10-13
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