Methane emission characteristics and model of coalbed methane wells in coal mining area

MI Baichao; LYU Shuaifeng; WANG Shengwei; CHEN Yongping; GAO Chao

Safety in Coal Mines > 2022 > 53(5): 150-156.

MI Baichao, LYU Shuaifeng, WANG Shengwei, CHEN Yongping, GAO Chao. Methane emission characteristics and model of coalbed methane wells in coal mining area[J]. Safety in Coal Mines, 2022, 53(5): 150-156.

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Methane emission characteristics and model of coalbed methane wells in coal mining area

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Published Date: May 19, 2022

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Abstract

Coalbed methane （ＣＢＭ） development in coal mining area has good safety, economic and energy benefits, but methane emission is common in surface well sites. In view of this, taking the CBM wells in Qinshui County of Shanxi Province as an example, the methane emission location and emission volume of CBM wells are obtained, and the prediction model of methane emission volume is established through field investigation and multiple regression analysis. The results show that 81% of CBM wells have methane emission. Wellhead and drainage outlet are the two main positions of methane emission. The proportion of wells with emission volume between 0-10 m³/d is 59%. On the whole, the emission accounts for 1.53% of the gas well production. There is almost no methane emission in the single liquid phase flow stage. The methane emission in the gas-liquid two-phase flow stage is positively correlated with the bottom hole flow pressure, times of stroke and gas production, and negatively correlated with the pump embedment and water production. The bottom hole flow pressure and the pump embedment have the greatest impact on the methane emission. In the single-phase gas flow stage, methane emission is positively correlated with gas production and casing pressure, and negatively correlated with stroke frequency and water production.
- coalbed methane well,
- methane emission,
- gas-liquid two-phase flow,
- single gas phase flow,
- multiple linear regression

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[1]	孙钦平，赵群，姜馨淳，等.新形势下中国煤层气勘探开发前景与对策思考[J].煤炭学报，2021，46（1）：65. SUN Qinping, ZHAO Qun, JIANG Xinchun, et al. Prospects and strategies of CBM exploration and development in China under the new situation[J]. Journal of China Coal Society, 2021, 46（1）: 65-76.
[2]	尚建华，刘会虎，桑树勋，等.沁水盆地南部高阶煤储层渗透率与孔裂隙发育的耦合分析[J].煤矿安全，2020，51（6）：184-190. SHANG Jianhua, LIU Huihu, SANG Shuxun, et al. Coupling analysis on permeability and pore fracture development in high rank coal reservoirs of southern Qinshui Basin[J]. Safety in Coal Mines, 2020, 51（6）: 184-190.
[3]	朱敬忠，李凌，杨森.基于因子分析的突水水源类型判别的研究[J].矿业安全与环保，2021，48（2）：87-91. ZHU Jingzhong, LI Ling, YANG Sen. Research on discrimination of mine water bursting source based on factor analysis[J]. Mining Safety & Environmental Protection, 2021, 48（2）: 87-91.
[4]	薛崇义，薛晔，纪晓东.基于Choquet-Brusselator的煤层气开发中社会生态系统风险动态演化研究[J].矿业安全与环保，2020，47（4）：116-121. XUE Chongyi, XUE Ye, JI Xiaodong. Study on dynamic evolution of social ecological system risk in CBM development based on Choquet - Brusselator[J]. Mining Safety & Environmental Protection, 2020, 47（4）: 116-121.
[5]	贾晓青，周宏.我国煤层气开发利用现状与对策研究-以晋城市为例[J].安全与环境工程，2013，20（6）：12. JIA Xiaoqing, ZHOU Hong. Present situation and countermeasure research for the exploitation and utilization of coal bed methane in China - taking Jincheng City as an example[J]. Safety and Environmental Engineering, 2013, 20（6）: 12.
[6]	申鹏磊，白建平，李贵山，等.深部煤层气水平井测-定-录一体化地质导向技术[J].煤炭学报，2020，45（7）：2491-2499. SHEN Penglei, BAI Jianping, LI Guishan, et al. Integrated geosteering technology of logging and orientation in deep coalbed methane horizontal well[J]. Journal of China Coal Society, 2020, 45（7）: 2491-2499.
[7]	吕帅锋，王生维，刘洪太，等.煤储层天然裂隙系统对水力压裂裂缝扩展形态的影响分析[J].煤炭学报，2020，45（7）：2590-2601. LYU Shuaifeng, WANG Shengwei, LIU Hongtai, et al. Analysis of the influence of natural fracture system on hydraulic fracture propagation morphology in coal reservoir[J]. Journal of China Coal Society, 2020, 45（7）: 2590-2601.
[8]	LYU Shuaifeng, WANG Shengwei, CHEN Xiaojun, et al. Natural fractures in soft coal seams and their effect on hydraulic fracture propagation: A field study[J]. Journal of Petroleum Science and Engineering, 2020, 192: 1-16.
[9]	李永福，葛继稳，翁闻畅，等.神农架大九湖泥炭湿地二氧化碳和甲烷排放化学计量比研究[J].安全与环境工程，2019，26（4）：21-28. LI Yongfu, GE Jiwen, WENG Wenchang, et al. Stoichiometry ratio of CO2 and CH4 emissions in Dajiuhu Peat Wetlang of Shennongjia[J]. Safety and Environmental Engineering, 2019, 26（4）: 21-28.
[10]	张燕鸣.井口泄漏的煤层气扩散规律及安全相关问题研究[D].青岛：中国石油大学，2011：45.
[11]	周广响，林日亿，孙东，等.井口套管温室气体排放因子研究[J].化学工程与装备，2016（4）：126-128.
[12]	李景贵.煤层气地面集输泄漏扩散模拟及风险评价研究[D].徐州：中国矿业大学，2014：25-34.
[13]	侯佳儒，曾媛媛.天然气开发过程中甲烷排放监管制度的多国比较与启示[J].天然气工业，2013，33（9）：126-130. HOU Jiaru, ZENG Yuanyuan. Regulation and oversight of the venting and leaking of methane in the natural gas development: a comparative study[J]. Natural Gas Industry, 2013, 33（9）: 126-130.
[14]	孔豫豫，王吉.不同泄漏半径的煤层气泄漏事故安全评价的研究[J].能源技术与管理，2019，44（6）：120.
[15]	罗科，李胤达，王振.多因素耦合下的采空区上覆岩层安全厚度分析[J].煤矿安全，2019，50（12）：223. LUO Ke, LI Yinda, WANG Zhen. Research on safety thickness of overlying strata in goaf under multi-factor coupling[J]. Safety in Coal Mines, 2019, 50（12）: 223-226.
[16]	郑启孝.山西永聚煤矿煤层特征对瓦斯的控制作用[J].科学技术与工程，2020，20（24）：9830-9834. ZHENG Qixiao. The geological characteristics of coal seam and controls on coal gas in Yongju Coal Mine, Shanxi Province[J]. Science Technology and Engineering, 2020, 20（24）: 9830-9834.
[17]	孟帅，朱绍军.Langmuir方程参数线性回归与非线性回归的比较[J].煤矿安全，2019，50（1）：188-191. MENG Shuai, ZHU Shaojun. Comparison Between linear regression and nonlinear regression of langmuir equation parameters[J]. Safety in Coal Mines, 2019, 50（1）: 188-191.

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[2]	QIN Wei, LI Wenping. Development characteristics of water conduction fracture zone in deep coal seam mining in Ordos Basin[J]. Safety in Coal Mines, 2021, 52(6): 217-222.
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[9]	LI Caihui. Simulation Study for Floor Failure Depth of Lower Coal Group Thin Aquifuge in Dongpang Coal Mine[J]. Safety in Coal Mines, 2014, 45(7): 26-29.
[10]	ZHU Hong-qing, ZHANG Ming-bo, PAN Feng-long, WANG Wen-hai. Fractured Zone Determination of Goaf Overlying Rock in Yangdong Coal Mine 8463 Working Face[J]. Safety in Coal Mines, 2013, 44(8): 207-209.

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