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[1]张俊朋　苗青　荆少东　王永胜　欧阳欣　范振宁　梁海宁　张建.埋地CO2管道泄漏扩散特征研究进展[J].油气储运,2024,43(05):1-14.
　ZHANG Jun-peng,MIAO Qing,JING Shao-dong,et al.Research progress on leakage characteristics of buried carbon dioxide pipelines[J].Oil & Gas Storage and Transportation,2024,43(05):1-14.

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埋地CO₂管道泄漏扩散特征研究进展

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 43 期数: 2024年05期页码: 1-14 栏目: 出版日期: 2024-05-25

Title:: Research progress on leakage characteristics of buried carbon dioxide pipelines

作者:: 张俊朋　苗青　荆少东　王永胜　欧阳欣　范振宁　梁海宁　张建

Author(s):: ZHANG Jun-peng; MIAO Qing; JING Shao-dong; WANG Yong-sheng; OUYANG Xin; FAN Zheng-ning; Liang Hai-ning; ZHANG Jian

关键词:: 埋地管道; CO₂; 泄漏扩散; 土壤; 数值模拟

Keywords:: Buried piping; CO₂; Leakage diffusion; Soils; Numerical simulation

分类号:: TE88

文献标志码:: A

摘要:: 【目的】CO2管道输送是二氧化碳捕集、利用和封存（Carbon Capture, Utilization, and Storage，CCUS）技术产业链中的关键环节，在输送过程存在意外泄漏风险，相比地上管道，埋地高压管道泄漏扩散机制受土壤阻力的影响更加复杂。然而，目前对于CO2管道泄漏扩散特征的研究综述主要聚焦于地上管道泄漏的场景。【方法】针对埋地管道小孔泄漏与全断裂两种常见场景，基于文献调研对目前埋地管道泄漏扩散的实验与模拟研究现状进行梳理评述，探究了土壤地质条件、土壤温度、外界压力以及外界风速对CO2气体在土壤渗流扩散过程中的影响，并总结了当前模拟埋地CO2管道全断裂泄漏扩散的建模方式与物理模型。【结果】对于埋地CO2管道小孔泄漏近场泄漏源特征的研究，主要以开展小型实验的方式研究泄漏口附近土壤温度变化以及干冰层、冻土层的增长规律。对于埋地CO2管道小孔泄漏远场扩散特征的模拟研究，大多假设土壤孔隙度不发生变化，并未考虑气体相变与冲击压力对土壤孔隙度的影响。埋地管道全尺度断裂条件下气体射流扩散的研究主要以模拟为主，且大多数模型直接以形成的洞坑为物理原型，未考虑洞坑的形成对气体射流扩散的影响。【结论】埋地CO2管道全尺寸断裂的现场测试和小孔泄漏扩散理论模型的建立仍有很大发展空间，建议通过专项攻关完善地质条件和外界环境对CO2气体在土壤中的扩散机制，加大投入开展埋地CO2管道大孔径或者全尺度断裂泄漏扩散试验，获取更多实验数据，以建立全面准确的数学物理模型。

Abstract:: [Purpose] CO2 pipeline transportation is a key link in the carbon capture, utilization, and storage (CCUS) technology industry chain. There is a risk of accidental leakage during the transportation process. Compared to above ground pipelines, the leakage diffusion mechanism of buried high-pressure pipelines is more complex due to soil resistance. However, the research review on the diffusion characteristics of CO2 pipeline leakage mainly focuses on the scenario of aboveground pipeline leakage. [Method] This paper reviews the current development status of experimental and simulation research on leakage and diffusion of buried pipelines in two common scenarios based on literature research: small hole leakage and total fracture. The effects of soil geological conditions, soil temperature, external pressure, and external wind speed on the diffusion process of CO2 gas in soil were explored. The current modeling methods and leakage diffusion models for simulating the complete fracture of buried CO2 pipelines were summarized. [Result] For the study of the characteristics of the near-field leakage source of small hole leakage in buried CO2 pipelines, small-scale experimental methods were mainly used to study the changes in soil temperature and the growth patterns of dry ice layer and permafrost layer. For simulation studies on the far-field diffusion characteristics of small hole leakage in buried CO2 pipelines, most studies assume that soil porosity does not change and do not consider the effects of gas phase change and pressure on soil porosity. [Conclusion] It is suggested to improve the diffusion mechanism of CO2 gas in soil by special research on the geological conditions and the external environment, and to increase the investment in carrying out the experiments of leakage diffusion of buried high-pressure CO2 pipeline with large aperture or full-scale fracture, so as to obtain more experimental data and to establish comprehensive and accurate mathematical-physical modeling.

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更新日期/Last Update: 2024-03-27