Advanced Search
Volume 47 Issue 1
Jan.  2025
Turn off MathJax
Article Contents
Article Navigation >  PETROLEUM GEOLOGY & EXPERIMENT  > 2025  >  47(1): 64-76
HE Xipeng, WANG Kaiming, LUO Wei, GAO Yuqiao, LIU Nana, GUO Tao, ZHOU Yatong, WU Didi. Geological characteristics and main enrichment controlling factors of coalbed methane in Nanchuan area, southeastern Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(1): 64-76. doi: 10.11781/sysydz2025010064
Citation: HE Xipeng, WANG Kaiming, LUO Wei, GAO Yuqiao, LIU Nana, GUO Tao, ZHOU Yatong, WU Didi. Geological characteristics and main enrichment controlling factors of coalbed methane in Nanchuan area, southeastern Sichuan Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2025, 47(1): 64-76. doi: 10.11781/sysydz2025010064
shu

Geological characteristics and main enrichment controlling factors of coalbed methane in Nanchuan area, southeastern Sichuan Basin

doi: 10.11781/sysydz2025010064

  • 1. SINOPEC Key Laboratory of Deep Coalbed Methane Exploration and Development, Nanjing, Jiangsu 210019, China;

  • 2. SINOPEC East China Oil & Gas Company, Nanjing, Jiangsu 210019, China;

  • 3. Research Institute of Exploration and Development, SINOPEC East China Oil & Gas Company, Nanjing, Jiangsu 210019, China

  • Received Date: 2024-08-29
  • Rev Recd Date: 2024-12-10
    • Available Online: 2025-01-24
    Abstract
  • A significant strategic breakthrough has been achieved in the exploration of deep coalbed methane (CBM) in the Upper Permian Longtan Formation in the Nanchuan area, southeastern Sichuan Basin, showing promising exploration potential for CBM in this area. To identify the main geological factors controlling its enrichment, this study used data from drilling, cores, well logging, and experimental analyses to investigate the geological characteristics and main controlling factors for CBM enrichment, focusing on coal seam distribution, coal quality, physical properties, gas content, and fracturability characteristics of the Longtan Formation. The results show that: (1) The main coal seams of the Longtan Formation exhibit stable distribution (thickness of 2.8 to 5.7 m), good coal body structure (mainly primary structural coal), high vitrinite content (average content of 79.7%), high degree of thermal evolution (average Ro of 1.9%), and low ash yield rate (average of 14.3 %). These characteristics provide the basic conditions for the formation of CBM reservoirs. (2) The coal reservoir has a pore-fracture structure, with micropores accounting for 78% of the total pore volume and contributing 99.6% of the total specific surface area, which is favorable for CBM adsorption and post-fracturing seepage. (3) The total gas content of the coal seam is 14.0 to 46.7 m3/t, with free gas accounting for 39% to 44%. It is characterized by “high gas content, abundant free gas, and oversaturation”, and its gas content increases with burial depth. (4) The in-situ stress in the study area is moderate (35 to 60 MPa), with a small two-way horizontal stress difference coefficient (＜0.1) and good roof and floor plates, forming effective stress shielding favorable for fracturing transformation. (5) The main controlling factors for CBM methane enrichment in the Nanchuan area include the sedimentary environment, which determines coal-bearing formations; the degree of coal evolution, which determines the intensity of hydrocarbon generation; and the preservation conditions, which govern CBM enrichment.

     

    • FullText(HTML)
  • loading
    • References(42)
  • [1]
    国土资源部油气资源战略研究中心, 等.煤层气资源动态评价[M].北京:地质出版社, 2017. Oil and Gas Resources Strategic Research Center of the Ministry of Land and Resources, et al.National coalbed methane resource assessment[M].Beijing:Geological Publishing House, 2017.
    [2]
    秦勇, 申建, 史锐.中国煤系气大产业建设战略价值与战略选择[J].煤炭学报, 2022, 47(1):371-387.

    QIN Yong, SHEN Jian, SHI Rui.Strategic value and choice on construction of large CMG industry in China[J].Journal of China Coal Society, 2022, 47(1):371-387.
    [3]
    戴金星.成煤作用中形成的天然气和石油[J].石油勘探与开发, 1979, 6(1):10-17.

    DAI Jinxing.Petroleum and natural gas generation in coalification[J].Petroleum Exploration and Development, 1979, 6(1):10-17.
    [4]
    陈刚, 秦勇, 李五忠, 等.鄂尔多斯盆地东部深层煤层气成藏地质条件分析[J].高校地质学报, 2012, 18(3):465-473.

    CHEN Gang, QIN Yong, LI Wuzhong, et al.Analysis of geological conditions of deep coalbed methane reservoiring in the eastern Ordos Basin[J].Geological Journal of China Universities, 2012, 18(3):465-473.
    [5]
    罗平亚.关于大幅度提高我国煤层气井单井产量的探讨[J].天然气工业, 2013, 33(6):1-6.

    LUO Pingya.A discussion on how to significantly improve the single-well productivity of CBM gas wells in China[J].Natural Gas Industry, 2013, 33(6):1-6.
    [6]
    宋岩, 柳少波, 琚宜文, 等.含气量和渗透率耦合作用对高丰度煤层气富集区的控制[J].石油学报, 2013, 34(3):417-426.

    SONG Yan, LIU Shaobo, JU Yiwen, et al.Coupling between gas content and permeability controlling enrichment zones of high abundance coal bed methane[J].Acta Petrolei Sinica, 2013, 34(3):417-426.
    [7]
    邹才能, 杨智, 黄士鹏, 等.煤系天然气的资源类型、形成分布与发展前景[J].石油勘探与开发, 2019, 46(3):433-442.

    ZOU Caineng, YANG Zhi, HUANG Shipeng, et al.Resource types, formation, distribution and prospects of coal-measure gas[J].Petroleum Exploration and Development, 2019, 46(3):433-442.
    [8]
    朱庆忠, 杨延辉, 左银卿, 等.对于高煤阶煤层气资源科学开发的思考[J].天然气工业, 2020, 40(1):55-60.

    ZHU Qingzhong, YANG Yanhui, ZUO Yinqing, et al.On the scientific exploitation of high-rank CBM resources[J].Natural Gas Industry, 2020, 40(1):55-60.
    [9]
    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):65-76.

    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.
    [10]
    周德华, 陈刚, 陈贞龙, 等.中国深层煤层气勘探开发进展、关键评价参数与前景展望[J].天然气工业, 2022, 42(6):43-51.

    ZHOU Dehua, CHEN Gang, CHEN Zhenlong, et al.Exploration and development progress, key evaluation parameters and prospect of deep CBM in China[J].Natural Gas Industry, 2022, 42(6):43-51.
    [11]
    程建, 周小进, 刘超英, 等.中西部大盆地重点勘探领域战略选区研究[J].石油实验地质, 2023, 45(2):229-237.

    CHENG Jian, ZHOU Xiaojin, LIU Chaoying, et al.Strategic area selection and key exploration fields in central and western large basins[J].Petroleum Geology & Experiment, 2023, 45(2):229-237.
    [12]
    秦勇.中国深部煤层气地质研究进展[J].石油学报, 2023, 44(11):1791-1811.

    QIN Yong.Progress on geological research of deep coalbed methane in China[J].Acta Petrolei Sinica, 2023, 44(11):1791-1811.
    [13]
    徐旭辉, 周卓明, 宋振响, 等.油气资源评价方法关键参数研究和资源分布特征：以中国石化探区“十三五”资源评价为例[J].石油实验地质, 2023, 45(5):832-843.

    XU Xuhui, ZHOU Zhuoming, SONG Zhenxiang, et al.Methods and key parameters for oil and gas resource assessment and distribution characteristics of oil and gas resource:a case study of resource assessment of SINOPEC during the 13th Five-Year Plan period[J].Petroleum Geology & Experiment, 2023, 45(5):832-843.
    [14]
    徐凤银, 侯伟, 熊先钺, 等.中国煤层气产业现状与发展战略[J].石油勘探与开发, 2023, 50(4):669-682.

    XU Fengyin, HOU Wei, XIONG Xianyue, et al.The status and development strategy of coalbed methane industry in China[J].Petroleum Exploration and Development, 2023, 50(4):669-682.
    [15]
    桑树勋, 韩思杰, 周效志, 等.华东地区深部煤层气资源与勘探开发前景[J].油气藏评价与开发, 2023, 13(4):403-415.

    SANG Shuxun, HAN Sijie, ZHOU Xiaozhi, et al.Deep coalbed methane resource and its exploration and development prospect in East China[J].Petroleum Reservoir Evaluation and Development, 2023, 13(4):403-415.
    [16]
    吴裕根, 门相勇, 娄钰.我国“十四五”煤层气勘探开发新进展与前景展望[J].中国石油勘探, 2024, 29(1):1-13.

    WU Yugen, MEN Xiangyong, LOU Yu.New progress and prospect of coalbed methane exploration and development in China during the 14th Five-Year Plan period[J].China Petroleum Exploration, 2024, 29(1):1-13.
    [17]
    SUN X, YI J, LI J.Characteristics of water occurrence in coalbed methane reservoir[J].Unconventional Resources, 2023, 3:30-36.
    [18]
    姚红生, 陈贞龙, 郭涛, 等.延川南深部煤层气地质工程一体化压裂增产实践[J].油气藏评价与开发, 2021, 11(3):291-296.

    YAO Hongsheng, CHEN Zhenlong, GUO Tao, et al.Stimulation practice of geology-engineering integration fracturing for deep CBM in Yanchuannan Field[J].Petroleum Reservoir Evaluation and Development, 2021, 11(3):291-296.
    [19]
    郭绪杰, 支东明, 毛新军, 等.准噶尔盆地煤岩气的勘探发现及意义[J].中国石油勘探, 2021, 26(6):38-49.

    GUO Xujie, ZHI Dongming, MAO Xinjun, et al.Discovery and significance of coal measure gas in Junggar Basin[J].China Petroleum Exploration, 2021, 26(6):38-49.
    [20]
    刘建忠, 朱光辉, 刘彦成, 等.鄂尔多斯盆地东缘深部煤层气勘探突破及未来面临的挑战与对策：以临兴—神府区块为例[J].石油学报, 2023, 44(11):1827-1839.

    LIU Jianzhong, ZHU Guanghui, LIU Yancheng, et al.Breakthrough, future challenges and countermeasures of deep coalbed methane in the eastern margin of Ordos Basin:a case study of Linxing-Shenfu block[J].Acta Petrolei Sinica, 2023, 44(11):1827-1839.
    [21]
    徐凤银, 王成旺, 熊先钺, 等.鄂尔多斯盆地东缘深部煤层气成藏演化规律与勘探开发实践[J].石油学报, 2023, 44(11):1764-1780.

    XU Fengyin, WANG Chengwang, XIONG Xianyue, et al.Evolution law of deep coalbed methane reservoir formation and exploration and development practice in the eastern margin of Ordos Basin[J].Acta Petrolei Sinica, 2023, 44(11):1764-1780.
    [22]
    何发岐, 董昭雄.深部煤层气资源开发潜力：以鄂尔多斯盆地大牛地气田为例[J].石油与天然气地质, 2022, 43(2):277-285.

    HE Faqi, DONG Zhaoxiong.Development potential of deep coalbed methane:a case study in the Daniudi gas field, Ordos Basin[J].Oil & Gas Geology, 2022, 43(2):277-285.
    [23]
    吴壮坤, 张宏录, 池宇璇, 等.新型排采泵在延川南深层煤层气井的改进及应用[J].油气藏评价与开发, 2023, 13(4):416-423.

    WU Zhuangkun, ZHANG Honglu, CHI Yuxuan, et al.Improvement and application of a novel drainage pump of deep coalbed methane wells in south Yanchuan[J].Petroleum Reservoir Evaluation and Development, 2023, 13(4):416-423.
    [24]
    黄力, 熊先钺, 王峰, 等.深层煤层气直丛井产能影响因素确定新方法[J].油气藏评价与开发, 2024, 14(6):990-996.

    HUANG Li, XIONG Xianyue, WANG Feng, et al.A new method for determining factors influencing productivity of deep coalbed methane vertical cluster wells[J].Petroleum Reservoir Evaluation and Development, 2024, 14(6):990-996.
    [25]
    冯义, 任凯, 刘俊田, 等.深层煤层气水平井安全钻井技术[J].钻采工艺, 2024, 47(3):33-41.

    FENG Yi, REN Kai, LIU Juntian, et al.Safe drilling technology for deep CBM horizontal wells[J].Drilling and Production Technology, 2024, 47(3):33-41.
    [26]
    刘晓.不同压裂规模下煤储层缝网形态对比研究:以延川南煤层气田为例[J].油气藏评价与开发, 2024, 14(3):510-518.

    LIU Xiao.Comparison of seam network morphology in coal reservoirs under different fracturing scales:a case of Yanchuannan CBM Gas Field[J].Petroleum Reservoir Evaluation and Development, 2024, 14(3):510-518.
    [27]
    姚红生, 房大志, 包凯, 等.渝东南地区龙潭组煤层气甜点地质评价及有效压裂工艺[J].煤炭科学技术, 2023, 51(S2):132-140.

    YAO Hongsheng, FANG Dazhi, BAO Kai, et al.Geological evaluation and effective fracturing technology of Longtan Formation CBM in Nanchuan block, southeast Chongqing, China[J].Coal Science and Technology, 2023, 51(S2):132-140.
    [28]
    郭涛, 金晓波, 武迪迪, 等.川东南南川区块龙潭组深部煤层气成藏特征及勘探前景[J].煤田地质与勘探, 2024, 52(4):60-67.

    GUO Tao, JIN Xiaobo, WU Didi, et al.Accumulation characteristics and exploration prospects of deep coalbed methane in the Longtan Formation of the Nanchuan block on the southeastern margin of the Sichuan Basin[J].Coal Geology & Exploration, 2024, 52(4):60-67.
    [29]
    汤济广, 李豫, 汪凯明, 等.四川盆地东南地区龙马溪组页岩气有效保存区综合评价[J].天然气工业, 2015, 35(5):15-23.

    TANG Jiguang, LI Yu, WANG Kaiming, et al.Comprehensive evaluation of effective preservation zone of Longmaxi Formation shale gas in the southeast Sichuan Basin[J].Natural Gas Industry, 2015, 35(5):15-23.
    [30]
    何希鹏, 张培先, 任建华, 等.渝东南南川地区东胜构造带常压页岩气勘探开发实践[J].石油实验地质, 2023, 45(6):1057-1066.

    HE Xipeng, ZHANG Peixian, REN Jianhua, et al.Exploration and development practice of normal pressure shale gas in Dongsheng structural belt, Nanchuan area, southeast Chongqing[J].Petroleum Geology & Experiment, 2023, 45(6):1057-1066.
    [31]
    梁新权, 周云, 蒋英, 等.二叠纪东吴运动的沉积响应差异:来自扬子和华夏板块吴家坪组或龙潭组碎屑锆石LA-ICPMS U-Pb年龄研究[J].岩石学报, 2013, 29(10):3592-3606.

    LIANG Xinquan, ZHOU Yun, JIANG Ying, et al.Difference of sedimentary response to Dongwu Movement:study on LA-ICPMS U-Pb ages of detrital zircons from Upper Permian Wujiaping or Longtan Formation from the Yangtze and Cathaysia blocks[J].Acta Petrologica Sinica, 2013, 29(10):3592-3606.
    [32]
    刘光祥, 金之钧, 邓模, 等.川东地区上二叠统龙潭组页岩气勘探潜力[J].石油与天然气地质, 2015, 36(3):481-487.

    LIU Guangxiang, JIN Zhijun, DENG Mo, et al.Exploration potential for shale gas in the Upper Permian Longtan Formation in eastern Sichuan Basin[J].Oil & Gas Geology, 2015, 36(3):481-487.
    [33]
    何治亮, 聂海宽, 李双建, 等.特提斯域板块构造约束下上扬子地区二叠系龙潭组页岩气的差异性赋存[J].石油与天然气地质, 2021, 42(1):1-15.

    HE Zhiliang, NIE Haikuan, LI Shuangjian, et al.Differential occurence of shale gas in the Permian Longtan Formation of Upper Yangtze region constrained by plate tectonics in the Tethyan domain[J].Oil & Gas Geology, 2021, 42(1):1-15.
    [34]
    明盈, 孙豪飞, 汤达祯, 等.四川盆地上二叠统龙潭组深超深部煤层气资源开发潜力[J].煤田地质与勘探, 2024, 52(2):102-112.

    MING Ying, SUN Haofei, TANG Dazhen, et al.Potential for the production of deep to ultradeep coalbed methane resources in the Upper Permian Longtan Formation, Sichuan Basin[J].Coal Geology & Exploration, 2024, 52(2):102-112.
    [35]
    张慧.煤孔隙的成因类型及其研究[J].煤炭学报, 2001, 26(1):40-44.

    ZHANG Hui.Genetical type of pores in coal reservoir and its research significance[J].Journal of China Coal Society, 2001, 26(1):40-44.
    [36]
    刘世奇, 王鹤, 王冉, 等.煤层孔隙与裂隙特征研究进展[J].沉积学报, 2021, 39(1):212-230.

    LIU Shiqi, WANG He, WANG Ran, et al.Research advances on characteristics of pores and fractures in coal seams[J].Acta Sedimentologica Sinica, 2021, 39(1):212-230.
    [37]
    胡雄, 邬长武, 杨秀春, 等.低渗透煤层微观孔隙结构与煤层气解吸规律[J].特种油气藏, 2024, 31(2):129-35.

    HU Xiong, WU Changwu, YANG Xiuchun, et al.Microscopic pore structure and coalbed methane desorption law in low-permeability coal seams[J].Special Oil & Gas Reservoirs, 2024, 31(2):129-35.
    [38]
    朱文涛, 李小刚, 任勇, 等.基于CT扫描的煤岩孔隙结构全孔径表征[J].特种油气藏, 2024, 31(4):71-80.

    ZHU Wentao, LI Xiaogang, REN Yong, et al.Full pore size characterization of coal pore structure based on CT scanning[J].Special Oil & Gas Reservoirs, 2024, 31(4):71-80.
    [39]
    秦勇, 傅雪海, 岳巍, 等.沉积体系与煤层气储盖特征之关系探讨[J].古地理学报, 2000, 2(1):77-84.

    QIN Yong, FU Xuehai, YUE Wei, et al.Relationship between depositional systems and characteristics of coalbed gas reservoir and its caprock[J].Journal of Palaeogeography, 2000, 2(1):77-84.
    [40]
    DIESSEL C F K.On the correlation between coal facies and depositional environments[C]//20th Symp Adv in the Study of the Sydney Basin.Newcastle, Australia:[s.n.], 1986.
    [41]
    张五侪, 李小彦.我国主要煤系生气源岩的生烃能力分析[J].煤田地质与勘探, 1988, 16(3):31-37.

    ZHANG Wuchai, LI Xiaoyan.Production capacity analysis of main coal measure gas source rocks in China[J].Coal Geology & Exploration, 1988, 16(3):31-37.
    [42]
    傅家谟, 刘德汉, 盛国英.煤成烃地球化学[M].北京:科学出版社, 1990. FU Jiamo, LIU Dehan, SHENG Guoying.Coal-generated hydrocarbon geochemistry[M].Beijing:Science Press, 1990.
    • Relative Articles
    • Supplements(0)
    • Cited By
  • 加载中

Catalog

    通讯作者: 陈斌, bchen63@163.com
    • 1. 

      沈阳化工大学材料科学与工程学院 沈阳 110142

    1. 本站搜索
    2. 百度学术搜索
    3. 万方数据库搜索
    4. CNKI搜索
    Citation
    XML
    PDF-CN

    Article Metrics

    Article views (7) PDF downloads(1) Cited by()
    Proportional views
    Related

    Website Copyright © Wuxi Research Institute of Petroleum Geology, SINOPEC 苏ICP备15009037号 苏公网安备32021102000780号

    Address：No. 2060, Lihu Avenue, Wuxi, Jiangsu   (214126) Tel：0510-68787204，68787203 Fax：0510-68787113 Email：sysydz.syky@sinopec.com

    Supported by: Beijing Renhe Information Technology Co. Ltd    

    /

    DownLoad:  Full-Size Img  PowerPoint
    Return
    Return