超临界CO<sub>2</sub>作用下深部煤裂缝扩展与增透提产一体化研究进展

doi:10.3799/dqkx.2026.132

超临界CO₂作用下深部煤裂缝扩展与增透提产一体化研究进展

doi: 10.3799/dqkx.2026.132

周三栋^1,2,3,
张伟鑫^1,2,3,
成巧耘^1,2,3,
刘大锰⁴,
严德天¹

1. 中国地质大学(武汉)资源学院, 湖北武汉 430074;
2. 中国地质大学(武汉)构造与油气资源教育部重点实验室, 湖北武汉 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)), 湖北武汉 430074;
4. 中国地质大学(北京)能源学院, 北京 100083

基金项目:

国家自然科学基金项目（42102219）；中国石油科技创新基金项目（2024DQ02-0110）

详细信息

作者简介:
周三栋（1991-），男，教授，博士，主要从事非常规油气储层地质学研究，ORCID： 0000-0002-9887-830X，E-mail： zhousandong@cug.edu.cn

中图分类号: P618.11
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出版历程
- 收稿日期: 2025-12-18
- 网络出版日期: 2026-05-13

Research progress on the integration of fracture propagation and enhanced coalbed methane recovery in deep coal under supercritical CO₂

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;
4. School of Energy Resources, China University of Geosciences (Beijing), Beijing 100083, China

摘要

摘要: 深部煤储层超临界CO₂（Sc-CO₂）压裂具增渗与碳封存双重效用。研究综合实验分析、理论模型和数值模拟认识，探究Sc-CO₂压裂深部煤裂缝起裂—扩展力学响应机制，剖析增产机理并提出裂缝扩展与增透提产一体化研究方向。研究表明：深部煤Sc-CO₂压裂裂缝起裂—扩展受煤储层特征和CO₂注入参数共同影响，其力学响应由表面能降低、塑化、膨胀和矿物溶解等机制约束。热流固耦合—能质传递分阶段模型可表征各阶段（Sc-CO₂压裂—相变致裂—改性阶段）裂缝扩展和增产效果，Sc-CO₂通过甲烷置换、力学弱化和渗透率提升实现增产。未来需重点攻关Sc-CO₂压裂深部煤裂缝差异化扩展规律、裂缝动态非均质性扩展机制及压裂—增产一体化评价。研究为深部煤Sc-CO₂压裂设计及煤层气增产改造提供技术支撑。
- 深部煤储层 /
- 煤层气 /
- CO₂压裂 /
- 裂缝 /
- 增产
Abstract: Supercritical CO₂ (Sc-CO₂) fracturing in deep coal reservoirs offers dual benefits of enhanced permeability and carbon sequestration. This study integrates experimental analysis, theoretical modeling, and numerical simulation to investigate the mechanical response mechanisms of fracture initiation and propagation in deep coal reservoirs during Sc-CO₂ fracturing, elucidate the mechanisms of production enhancement, and propose integrated research directions of fracture propagation and increased permeability and production. The results show that the fracture initiation and propagation of Sc-CO₂ fracturing in deep coal reservoirs are jointly influenced by reservoir characteristics and CO₂ injection parameters, with the mechanical response constrained by mechanisms including surface energy reduction, plasticization, expansion, and mineral dissolution. A staged model of thermo-hydro-mechanical coupling-energy and mass transfer can characterize the fracture propagation and production enhancement effects across stages (Sc-CO₂ fracturing, phase-change fracturing, and modification). Sc-CO₂ achieves production enhancement through methane displacement, mechanical weakening, and permeability increase. Future research should focus on the differential fracture propagation laws, the dynamic heterogeneous fracture propagation mechanisms, and the integrated evaluation for fracturing and production enhancement during Sc-CO₂ fracturing in deep coal reservoirs. This research provides technical support for the Sc-CO₂ fracturing design in deep coal reservoirs and coalbed methane production enhancement projects.
- deep coal reservoirs /
- coalbed methane /
- CO₂ fracturing /
- crack /
- enhanced coalbed methane recovery

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超临界CO₂作用下深部煤裂缝扩展与增透提产一体化研究进展

doi: 10.3799/dqkx.2026.132

作者简介:
周三栋（1991-），男，教授，博士，主要从事非常规油气储层地质学研究，ORCID： 0000-0002-9887-830X，E-mail： zhousandong@cug.edu.cn

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Research progress on the integration of fracture propagation and enhanced coalbed methane recovery in deep coal under supercritical CO₂

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超临界CO2作用下深部煤裂缝扩展与增透提产一体化研究进展

doi: 10.3799/dqkx.2026.132

作者简介: 周三栋（1991-），男，教授，博士，主要从事非常规油气储层地质学研究，ORCID： 0000-0002-9887-830X，E-mail： zhousandong@cug.edu.cn

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Research progress on the integration of fracture propagation and enhanced coalbed methane recovery in deep coal under supercritical CO2

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超临界CO₂作用下深部煤裂缝扩展与增透提产一体化研究进展

作者简介:
周三栋（1991-），男，教授，博士，主要从事非常规油气储层地质学研究，ORCID： 0000-0002-9887-830X，E-mail： zhousandong@cug.edu.cn

Research progress on the integration of fracture propagation and enhanced coalbed methane recovery in deep coal under supercritical CO₂