| 六盘水煤田土城向斜煤储层现今地应力分布特征及其效应 |
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| 引用本文： | 易同生,金军,鞠玮,王胜宇,胡浩浩,黄沛铭,钟宇.六盘水煤田土城向斜煤储层现今地应力分布特征及其效应[J].中国煤炭地质,2021(2). |
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| 作者姓名： | 易同生 金军 鞠玮 王胜宇 胡浩浩 黄沛铭 钟宇 |
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| 作者单位： | 贵州省煤田地质局;中国矿业大学资源与地球科学学院;煤层气资源与成藏过程教育部重点实验室中国矿业大学 |
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| 基金项目： | 《贵州省西部煤系气调查评价》(2018-01号)与《六盘水地区煤层气水平井抽采关键技术研究》(黔科合支撑[2020]2Y028号)联合资助。 |
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| 摘 要： | 近期勘探实践显示,六盘水煤田土城向斜内煤层气资源丰富,如何实现高效开发是关键,而现今地应力在煤层气开发过程中具有重要作用。本次研究基于研究区注入/压降地应力实测数据,分析土城向斜煤储层现今地应力分布特征及其效应,结果表明:煤储层现今地应力随埋藏深度的增加而逐渐增大,呈明显的线性关系。水平最大主应力和最小主应力均随着煤储层压力的增大而增大,表明现今地应力对于煤储层能量有所贡献,影响独立叠置含煤层气系统的形成。现今地应力影响煤层渗透性,进而控制煤层气开发。土城向斜内煤储层渗透率随有效地应力增大呈指数减小。本次研究成果期望可以在六盘水煤田土城向斜煤层气开发中提供新的地质参考与科学依据。
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| 关 键 词： | 现今地应力 土城向斜 煤储层 龙潭组 六盘水煤田 |
Present Ground Stress Distribution Features and Effects in Tucheng Syncline,Liupanshui Coalfield |
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| Yi Tongsheng,Jin Jun,Ju Wei,Wang Shengyu,Hu Haohao,Huang Peiming,Zhong Yu.Present Ground Stress Distribution Features and Effects in Tucheng Syncline,Liupanshui Coalfield[J].Coal Geology of China,2021(2). |
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| Authors: | Yi Tongsheng Jin Jun Ju Wei Wang Shengyu Hu Haohao Huang Peiming Zhong Yu |
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| Institution: | (Guizhou Bureau of Coal Geology,Guiyang,Guizhou 550008;School of Resources and Geosciences,CUMT,Xuzhou,Jiangsu 221116;Ministry of Education Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process,CUMT,Xuzhou,Jiangsu 221008) |
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| Abstract: | The recent exploration practices have shown that CBM resources are abundant in the Tucheng syncline,Liupanshui coalfield.How to realize efficient exploitation is the key,while present ground stress will play an important role during CBM exploitation process.The study is based on study area injection/pressure fall experiment measured ground stress data have analyzed present ground stress distribution features and effects of coal reservoir in Tucheng syncline.The result has shown that coal reservoir present ground stress is gradually increasing with buried depth inreasing and presented obvious linear relationship.Horizontal maximum and minimum principal stresses are all increasing with coal reservoir pressure increasing.It indicates present ground stress has some contributions to coal reservoir energy,and impacted the formation of independent superimposed CBM-bearing system.Present ground stress will impact coal seam permeability,and then control CBM exploitation.Coal reservoir permeability in Tucheng syncline will present exponential decreasing with effective ground stress increasing.The studied result can be expected to provide new geological references and scientific basis for CBM exploitation in Tucheng syncline,Liupanshui coalfield. |
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| Keywords: | present ground stress Tucheng syncline coal reservoir Longtan Formation Liupanshui coalfield |
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