Wu Meng, Qin Yong, Zhang Yuanyuan, Zhu Shifei, Zhang Guchun, Lan Fengjuan, Song Xuejuan, Feng Lele, Qin Yunhu
Jiangsu Mineral Resources and Geological Design and Research Institute, China National Administration of Coal Geology, Xuzhou, Jiangsu 221006, China.
Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China.
ACS Omega. 2023 May 3;8(19):16561-16569. doi: 10.1021/acsomega.3c01148. eCollection 2023 May 16.
The geological sequestration of CO in coal seams holds significant implications for coalbed methane development and greenhouse gas mitigation. This paper examines the principles, influencing factors, and evaluation methods for geological CO sequestration in coal seams by analyzing relevant domestic and international findings. Suitable geological conditions for CO sequestration include burial depths between 300 and 1300 m, permeability greater than 0.01 × 10 μm, caprock and floor strata with water isolation capabilities, and high-rank bituminous coal or anthracite with low ash yield. Geological structures, shallow freshwater layers, and complex hydrological conditions should be avoided. Additionally, the engineering conditions of temperature, pressure, and storage time for CO sequestration should be given special attention. The feasibility evaluation of CO geological storage in coal seams necessitates a comprehensive understanding of coalfield geological factors. By integrating the evaluation principles of site selection feasibility, injection controllability, sequestration security, and development economy, various mathematical models and "one vote veto" power can optimize the sequestration area and provide recommendations for rational CO geological storage layout.
二氧化碳在煤层中的地质封存对煤层气开发和温室气体减排具有重要意义。本文通过分析国内外相关研究成果，探讨了煤层地质二氧化碳封存的原理、影响因素及评价方法。适合二氧化碳封存的地质条件包括：埋藏深度在300至1300米之间、渗透率大于0.01×10μm、具有隔水能力的盖层和底板地层，以及低灰分产率的高阶烟煤或无烟煤。应避免地质构造、浅层淡水层和复杂的水文条件。此外，还应特别关注二氧化碳封存的温度、压力和储存时间等工程条件。煤层二氧化碳地质封存的可行性评价需要全面了解煤田地质因素。通过综合选址可行性、注入可控性、封存安全性和开发经济性等评价原则，运用各种数学模型和“一票否决”权，可以优化封存区域，为合理的二氧化碳地质封存布局提供建议。
