吉林大学学报(地球科学版) ›› 2026, Vol. 56 ›› Issue (2): 397-412.doi: 10.13278/j.cnki.jjuese.20250134

• 地质与资源 •    下一篇

深部煤储层中煤层水可动性评价方法及动力学机制研究进展

周三栋1,2,3, 张伟鑫1,2,3, 成巧耘1,2,3, 魏佳成1,2,3, 周国栋1,2,3   

  1. 1.中国地质大学(武汉)资源学院,武汉430074

    2.构造与油气资源教育部重点实验室(中国地质大学(武汉)),武汉430074

    3.油气勘探开发理论与技术湖北省重点实验室(中国地质大学(武汉)),武汉430074

  • 出版日期:2026-03-26 发布日期:2026-04-15
  • 基金资助:
    中国石油科技创新基金项目(2024DQ02-0110);国家自然科学基金项目(42102219)

Research Progress on Evaluation Method and Dynamic Mechanism of Coalbed  Water Movability in Deep Coal Reservoirs 

Zhou Sandong1,2,3, Zhang Weixin1,2,3, Cheng Qiaoyun1,2,3, Wei Jiacheng1,2,3, Zhou Guodong1,2,3   

  1. 1. School of Earth Resources, China University of Geosciences, Wuhan 430074, China

    2. Key Laboratory of Tectonics and Petroleum Resources (China University of Geosciences), Ministry of Education, Wuhan 430074,

    China

    3. Hubei Key Laboratory of Oil and Gas Exploration and Development Theory and Technology (China University of Geosciences),

    Wuhan 430074, China

  • Online:2026-03-26 Published:2026-04-15

摘要: 深部煤储层中煤层水的可动性是制约煤层气有效产出的关键因素。为明确深部煤储层中煤层水可动性的评价方法,指明未来研究发展方向,本研究在充分调研前人成果基础上,结合理论分析和实验测试结果,探讨了深部煤储层中煤层水可动性动力学机制的研究进展,剖析了煤层水可动性影响因素及规律。结果表明:探明煤储层中水分赋存状态及煤层水可动性特征,通常需多种方法组合使用;水蒸气吸附实验可用于明确纳米级孔隙的吸附水特征,建议优先采用核磁共振和压汞实验联合表征可动水饱和度和全尺度孔隙结构,再结合岩心驱替实验验证煤层水可动性。煤层水可动性受到煤岩学特征、孔渗特征和矿物特征的影响。其中最大镜质体反射率通过改变煤岩孔隙结构对可动水饱和度产生先增后降的非线性影响。镜质组体积分数、灰分产率、孔隙度、渗透率和大孔(半径>1 000 nm)体积分数升高,可动水饱和度显著增加;而惰质组体积分数、固定碳产率、微孔—中孔(半径<1 000 nm)体积分数升高抑制煤层水可动性。未来应重点围绕深部煤储层可动水表征、含水性主控因素及定量评价、产水模拟及机理分析和水运移的动力学机制剖析4个攻关方向开展研究。

关键词: 深部煤层气, 煤层水, 可动性评价, 水运移, 煤储层

Abstract: The movability of coalbed water in deep coal reservoirs is a key factor restricting the effective output of coalbed methane. Based on the full investigation of results of previous researchers, combined with theoretical analyses and experimental test results, in order to clarify the evaluation method of the movability of coalbed water in deep coal reservoirs, this study discusses the progress of the research on the dynamic mechanism of the movability of coalbed water in deep coal reservoirs, analyzes the influencing factors and laws of the movability of coalbed water, and points out the development direction of future research. The results show that: A combination of methods is needed to characterize the water occurrence state and the water movability in coal reservoirs. Water vapor isothermal adsorption experiment can be used to clarify the water adsorption characteristics of nanoscale pores, and it is recommended to prioritize the use of nuclear magnetic resonance and mercury injection experiments to jointly characterize the movable water saturation and the full-scale pore structure, and then combine them with the core displacement experiment to verify the water movability in the coal reservoirs. The movability of coalbed water is affected by coal petrological characteristics, porosity and permeability characteristics, and mineral characteristics. Among them, the maximum vitrinite reflectance has a nonlinear effect on the movable water saturation by changing the coal rock pore structure, which first increases and then decreases. The movable water saturation increases significantly when the vitrinite volume fraction, ash yield, porosity, permeability and macropore (radius > 1 000 nm) volume fraction increase. While the inertinite volume fraction, fixed carbon yield, and micropore-mesopore (radius < 1 000 nm) volume fraction increased to inhibit the movability of coalbed water. In the future, four research directions should be focused on, including the characterization of movable water, the main controlling factors and quantitative evaluation of water content, the simulation and mechanism analysis of water production, and the dynamic mechanism analysis of water migration in deep coal reservoirs.

Key words: deep coalbed methane, coalbed water, movability evaluation, water transport, coal reservoirs

中图分类号: 

  • P618.11
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