煤田地质与勘探2025，Vol.53Issue(12)：36-48,13.DOI:10.12363/issn.1001-1986.25.05.0362
CO2地质封存协同上覆煤矿开采环境风险评估
Environmental risk assessment of CO2 storage combined with the overlying coal mining
摘要
Abstract
[Objective]Carbon capture,utilization,and storage(CCUS)technology serves as a key method for carbon neutrality.However,large-scale engineering applications of CCUS are still confronted with serious challenges of envir-onmental risks.Therefore,systematic environmental risk assessment plays an essential role in ensuring the environment-al safety and social acceptability of CO2 geological storage projects.[Methods]Targeting the CO2 geological storage project combined with overlying coal mining in Zhengning County,Gansu Province,this study performed the environ-mental risk assessment of CO2 leakage based on the requirements of the Technical Guideline on Environmental Risk As-sessment for Carbon Dioxide Capture,Utilization,and Storage(on Trial)(hereinafter referred to as the Guideline).Ini-tially,this study identified the environmental risks associated with the project using the features,events,and processes(FEP)method.Then,based on the risk identification results,this study,through expert workshops,assessed the risks of CO2 leakage to environmental media and beings using the risk matrix-based assessment method recommended in the Guideline.Finally,targeted recommendations for risk management were proposed according to the assessment results.[Results and Conclusions]The results reveal low to ultra-low,acceptable environmental risks to receptors,except for the medium to high,unacceptable risk of blowout events to the surface atmosphere.The medium risk was reduced to a low,acceptable risk level after the implementation of targeted prevention and control measures such as enhancing well-bore integrity,installing wellhead devices matched with formation pressure,and space-atmosphere-surface-underground intelligent collaborative responses.Based on the environmental risk assessment results,this study constructed a phased prevention and control system,including strengthening wellbore integrity before CO2 injection,implementing dynamic regulation and response during CO2 injection,and establishing atmosphere-surface coordinated monitoring during CO2 storage.This will provide risk management and control for the safe operation of CO2 geological storage projects.关键词
CO2地质封存/煤矿开采/环境风险评估/特征-事件-过程/风险矩阵法Key words
CO2 geological storage/coal mining/environmental risk assessment/the features,events,and processes(FEP)/risk matrix method分类
资源环境引用本文复制引用
顾雷雨,李文辉,黄为,周全超,朱亚龙,李霞颖,刘桂臻,李琦..CO2地质封存协同上覆煤矿开采环境风险评估[J].煤田地质与勘探,2025,53(12):36-48,13.基金项目
内蒙古自治区科技重大专项(2021ZD0034) （2021ZD0034）
华能集团总部科技项目(HNKJ22-H155) （HNKJ22-H155）
