Influence Factors and Feasibility Evaluation on Geological Sequestration of CO2 in Coal Seams: A Review

Meng Wu; Yong Qin; Yuanyuan Zhang; Shifei Zhu; Guchun Zhang; Fengjuan Lan; Xuejuan Song; Lele Feng; Yunhu Qin

doi:10.1021/acsomega.3c01148

Influence Factors and Feasibility Evaluation on Geological Sequestration of CO₂ in Coal Seams: A Review

ACS Omega. 2023 May 3;8(19):16561-16569. doi: 10.1021/acsomega.3c01148. eCollection 2023 May 16.

Authors

Meng Wu^{1

2}, Yong Qin², Yuanyuan Zhang¹, Shifei Zhu¹, Guchun Zhang¹, Fengjuan Lan², Xuejuan Song³, Lele Feng⁴, Yunhu Qin¹

Affiliations

¹ Jiangsu Mineral Resources and Geological Design and Research Institute, China National Administration of Coal Geology, Xuzhou, Jiangsu 221006, China.
² Key Laboratory of Coalbed Methane Resources and Reservoir Formation Process, Ministry of Education, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China.
³ School of Civil Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu 221018, China.
⁴ School of Safety and Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.

Abstract

The geological sequestration of CO₂ 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 CO₂ sequestration in coal seams by analyzing relevant domestic and international findings. Suitable geological conditions for CO₂ sequestration include burial depths between 300 and 1300 m, permeability greater than 0.01 × 10^-3 μm², 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 CO₂ sequestration should be given special attention. The feasibility evaluation of CO₂ 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 CO₂ geological storage layout.

Publication types

Review