The in-situ conversion of deep coal resources represents one of the most important and promising technological directions for the efficient and clean utilization of deep coal deposits. However, because such conversion processes are typically conducted under extreme and complex environments characterized by high temperature, high pressure, and the coupled action of multiple physical and chemical components, the coal seam-wellbore system is highly susceptible to structural instability, mechanical failure, and integrity damage. In view of these distinctive and challenging characteristics, there is an urgent need to reveal the underlying mechanisms by which the aforementioned factors influence the adaptability of the coal seam-wellbore system to supercritical conversion.The principal focus of this study is the effect mechanism of the thermo-poro-chemo-mechanical (temperature-pressure-seepage-reaction) multi-field coupled action on the entire coal-wellbore system. Accordingly, this paper establishes an evaluation methodology for the stability and integrity of the wellbore system under supercritical conversion conditions, and develops a comprehensive life-cycle evaluation system for the wellbore. By clarifying the coupling laws among thermal, hydraulic, mechanical, and chemical fields, the proposed method provides a theoretical foundation for the safe and efficient development of deep coal resources through in-situ conversion. This integrated framework is expected to support the design of wellbore engineering technical solutions and process measures tailored to coal in-situ conversion, and to contribute substantially to ensuring the safety, reliability, and quality of the entire underground coal gasification process. The research outcomes are of great significance for promoting the industrial application of underground coal gasification technology.
| Published in | Science Research (Volume 14, Issue 6) |
| DOI | 10.11648/j.sr.20261406.21 |
| Page(s) | 464-470 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2026. Published by Science Publishing Group |
In-situ Coal Conversion, Supercritical Conversion Environment, Multi-field Coupled Response, Wellbore Integrity
井型类别 | 工程功能 | 主要运行环境 | 关键工程约束 |
|---|---|---|---|
注入井 | 注入超临界介质与气化剂 | 高压、高温、连续流动 | 管柱承压与密封可靠性 |
生产井 | 采出粗煤气及反应产物 | 高温、多组分腐蚀性介质 | 套管稳定性与完整性 |
配套管柱 | 介质输送与井筒隔离 | 温压交变、多场耦合作用 | 力学响应与材料耐久性 |
参数类型 | 典型范围 | 变化特征 | 工程影响 |
|---|---|---|---|
温度 | 高于临界温度 | 物性突变区明显 | 影响传热与反应速率 |
压力 | 高于临界压力 | 密度随压变化显著 | 影响流动与承压 |
密度 | 随温压强烈变化 | 非线性特征突出 | 影响介质输运 |
黏度 | 中低水平波动 | 对流动阻力敏感 | 影响井筒压降 |
失效模式 | 主要影响场 | 风险特征 | 评价关注点 |
|---|---|---|---|
热致失稳 | 温度场 | 变形集中、应力升高 | 热应变与强度退化 |
承压破坏 | 压力场 | 局部破裂 | 承载能力裕度 |
渗流破坏 | 渗流场 | 结构侵蚀 | 渗透性变化 |
化学腐蚀 | 化学反应场 | 材料劣化 | 腐蚀速率与程度 |
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APA Style
Liu, Y., Li, X., Sun, R., Zhang, H., Feng, M., et al. (2026). Study on the Multifield Coupling Response Mechanism of Coal Seam-Wellbore System in Supercritical Transformation Environment. Science Research, 14(6), 464-470. https://doi.org/10.11648/j.sr.20261406.21
ACS Style
Liu, Y.; Li, X.; Sun, R.; Zhang, H.; Feng, M., et al. Study on the Multifield Coupling Response Mechanism of Coal Seam-Wellbore System in Supercritical Transformation Environment. Sci. Res. 2026, 14(6), 464-470. doi: 10.11648/j.sr.20261406.21
AMA Style
Liu Y, Li X, Sun R, Zhang H, Feng M, et al. Study on the Multifield Coupling Response Mechanism of Coal Seam-Wellbore System in Supercritical Transformation Environment. Sci Res. 2026;14(6):464-470. doi: 10.11648/j.sr.20261406.21
@article{10.11648/j.sr.20261406.21,
author = {Yishan Liu and Xiaoxuan Li and Runxuan Sun and Honglin Zhang and Ming Feng and Aodong Li},
title = {Study on the Multifield Coupling Response Mechanism of Coal Seam-Wellbore System in Supercritical Transformation Environment},
journal = {Science Research},
volume = {14},
number = {6},
pages = {464-470},
doi = {10.11648/j.sr.20261406.21},
url = {https://doi.org/10.11648/j.sr.20261406.21},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sr.20261406.21},
abstract = {The in-situ conversion of deep coal resources represents one of the most important and promising technological directions for the efficient and clean utilization of deep coal deposits. However, because such conversion processes are typically conducted under extreme and complex environments characterized by high temperature, high pressure, and the coupled action of multiple physical and chemical components, the coal seam-wellbore system is highly susceptible to structural instability, mechanical failure, and integrity damage. In view of these distinctive and challenging characteristics, there is an urgent need to reveal the underlying mechanisms by which the aforementioned factors influence the adaptability of the coal seam-wellbore system to supercritical conversion.The principal focus of this study is the effect mechanism of the thermo-poro-chemo-mechanical (temperature-pressure-seepage-reaction) multi-field coupled action on the entire coal-wellbore system. Accordingly, this paper establishes an evaluation methodology for the stability and integrity of the wellbore system under supercritical conversion conditions, and develops a comprehensive life-cycle evaluation system for the wellbore. By clarifying the coupling laws among thermal, hydraulic, mechanical, and chemical fields, the proposed method provides a theoretical foundation for the safe and efficient development of deep coal resources through in-situ conversion. This integrated framework is expected to support the design of wellbore engineering technical solutions and process measures tailored to coal in-situ conversion, and to contribute substantially to ensuring the safety, reliability, and quality of the entire underground coal gasification process. The research outcomes are of great significance for promoting the industrial application of underground coal gasification technology.},
year = {2026}
}
TY - JOUR T1 - Study on the Multifield Coupling Response Mechanism of Coal Seam-Wellbore System in Supercritical Transformation Environment AU - Yishan Liu AU - Xiaoxuan Li AU - Runxuan Sun AU - Honglin Zhang AU - Ming Feng AU - Aodong Li Y1 - 2026/11/10 PY - 2026 N1 - https://doi.org/10.11648/j.sr.20261406.21 DO - 10.11648/j.sr.20261406.21 T2 - Science Research JF - Science Research JO - Science Research SP - 464 EP - 470 PB - Science Publishing Group SN - 2329-0927 UR - https://doi.org/10.11648/j.sr.20261406.21 AB - The in-situ conversion of deep coal resources represents one of the most important and promising technological directions for the efficient and clean utilization of deep coal deposits. However, because such conversion processes are typically conducted under extreme and complex environments characterized by high temperature, high pressure, and the coupled action of multiple physical and chemical components, the coal seam-wellbore system is highly susceptible to structural instability, mechanical failure, and integrity damage. In view of these distinctive and challenging characteristics, there is an urgent need to reveal the underlying mechanisms by which the aforementioned factors influence the adaptability of the coal seam-wellbore system to supercritical conversion.The principal focus of this study is the effect mechanism of the thermo-poro-chemo-mechanical (temperature-pressure-seepage-reaction) multi-field coupled action on the entire coal-wellbore system. Accordingly, this paper establishes an evaluation methodology for the stability and integrity of the wellbore system under supercritical conversion conditions, and develops a comprehensive life-cycle evaluation system for the wellbore. By clarifying the coupling laws among thermal, hydraulic, mechanical, and chemical fields, the proposed method provides a theoretical foundation for the safe and efficient development of deep coal resources through in-situ conversion. This integrated framework is expected to support the design of wellbore engineering technical solutions and process measures tailored to coal in-situ conversion, and to contribute substantially to ensuring the safety, reliability, and quality of the entire underground coal gasification process. The research outcomes are of great significance for promoting the industrial application of underground coal gasification technology. VL - 14 IS - 6 ER -