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首页> 外文期刊>Energy Exploration & Exploitation >Geological conditions of coalbed methane accumulation in the Hancheng area, southeastern Ordos Basin, China: Implications for coalbed methane high-yield potential
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Geological conditions of coalbed methane accumulation in the Hancheng area, southeastern Ordos Basin, China: Implications for coalbed methane high-yield potential

机译：鄂尔多斯盆地东南部汉城地区煤层气成藏的地质条件：对煤层气高产潜力的启示

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摘要

The Hancheng area is a hot spot for coalbed methane exploration and exploitation in China. Structure is a key factor affecting coalbed methane accumulation and production in the Hancheng area. For a better understanding of the coalbed methane accumulation conditions and high-yield potential, this study investigates the structural patterns and evolution, the hydrogeological conditions, and the geothermal field in the coal-bearing strata in the Hancheng area. Then, the spatial distribution of the coalbed methane content and the tectonic deformation of the coal seam are evaluated. Finally, the critical depth for coalbed methane enrichment and a high-yield potential are revealed, and the favorable areas for coalbed methane development are predicted. The following conclusions are obtained: (1) Under the Yanshanian SE-NW trending maximum principle stress, the Hancheng overturned anticline was formed and subsequently subjected to uplift and erosion along its axis, which led to the NW limb of the anticline forming the current uniclinal structure of the Hancheng area; (2) Four degrees of tectonic deformation in the coal seam are identified based on structural curvature analysis. The moderately deformed area shallower than 800 m would benefit coalbed methane production with higher permeability. Most of the locations of coal and gas outburst events that occur during coal mining were distributed along the highly and very highly deformed areas; (3) The gas content gradually increases along the NW-trending inclination of the coal seam. 400 m and 800 m are discriminated as the critical depth levels for controlling coalbed methane accumulation and a high yield. Secondary biogenic methane was generated in the shallow formations; and (4) The Hancheng area is divided into four ranks for determining coalbed methane development potential. From high to low, they are ranked A, B-1, B-2, and C. Most of the high-yield wells are located in the areas ranked A and B-1.
机译：汉城地区是中国煤层气勘探开发的热点地区。结构是影响韩城地区煤层气成藏和生产的关键因素。为了更好地了解煤层气成藏条件和高产潜力，本研究调查了韩城地区含煤地层的构造模式和演化，水文地质条件以及地热场。然后，评估了煤层甲烷含量的空间分布和煤层的构造变形。最后，揭示了煤层气富集的临界深度和高产潜力，并预测了煤层气开发的有利区域。得到以下结论：（1）在燕山期南北向东向趋势的最大主应力作用下，形成了汉城倾覆背斜，并随后沿其轴线隆起和侵蚀，导致背斜的西北肢形成当前的单斜面。韩城地区的结构； （2）根据构造曲率分析确定了煤层的四个构造变形程度。小于800 m的中等变形区域将有利于煤层气的生产，并具有较高的渗透率。煤矿开采过程中发生的大多数煤与瓦斯突出事件发生的地点分布在高度变形的地区。 （3）瓦斯含量随着煤层向西北方向倾斜而逐渐增加。将400 m和800 m区分为控制煤层气积聚和高产的关键深度水平。浅层地层中产生次生生物甲烷。 （4）确定成层煤层气开发潜力的汉城地区分为四个等级。从高到低，它们分别排在A，B-1，B-2和C等级。大多数高产井位于A和B-1等级的地区。

著录项

  • 来源
    《Energy Exploration & Exploitation》 |2019年第3期|922-944|共23页
  • 作者

    Guo Chen; Xia Yucheng; Ma Dongmin; Sun Xueyang; Dai Gelian; Shen Jian; Chen Yue; Lu Lingling;

  • 作者单位

    Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China|Xian Univ Sci & Technol, Postdoctoral Res Stn Geol Resources & Geol Engn, Xian, Shaanxi, Peoples R China|Xian Univ Sci & Technol, Geol Res Inst Coal Green Min, Xian, Shaanxi, Peoples R China|Shaanxi Prov Key Lab Geol Support Coal Green Expl, Xian, Shaanxi, Peoples R China|Minist Land & Resources, Key Lab Coal Resources Explorat & Comprehens Util, Xian, Shaanxi, Peoples R China;

    Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China|Xian Univ Sci & Technol, Geol Res Inst Coal Green Min, Xian, Shaanxi, Peoples R China|Shaanxi Prov Key Lab Geol Support Coal Green Expl, Xian, Shaanxi, Peoples R China;

    Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China|Xian Univ Sci & Technol, Geol Res Inst Coal Green Min, Xian, Shaanxi, Peoples R China|Minist Land & Resources, Key Lab Coal Resources Explorat & Comprehens Util, Xian, Shaanxi, Peoples R China;

    Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China|Xian Univ Sci & Technol, Geol Res Inst Coal Green Min, Xian, Shaanxi, Peoples R China|Shaanxi Prov Key Lab Geol Support Coal Green Expl, Xian, Shaanxi, Peoples R China;

    Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China;

    China Univ Min & Technol, Key Lab Coalbed Methane Resources & Reservoir For, Minist Educ, Xuzhou, Jiangsu, Peoples R China;

    Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China|Xian Univ Sci & Technol, Postdoctoral Res Stn Geol Resources & Geol Engn, Xian, Shaanxi, Peoples R China|Xian Univ Sci & Technol, Geol Res Inst Coal Green Min, Xian, Shaanxi, Peoples R China|Minist Land & Resources, Key Lab Coal Resources Explorat & Comprehens Util, Xian, Shaanxi, Peoples R China;

    Xian Univ Sci & Technol, Coll Geol & Environm, Xian 710054, Shaanxi, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Coalbed methane; accumulation; high yield; structure; critical depth; Ordos Basin;

    机译：煤层气富集高产结构临界深度鄂尔多斯盆地;

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