西南石油大学学报（自然科学版）2025，Vol.47Issue(3)：156-169,14.DOI:10.11885/j.issn.1674-5086.2022.11.05.01
煤矿采空区天然气井完整性风险评价及对策研究
Integrity Risk Assessment and Countermeasures for Gas-coal Cooperative Exploitation of Sulfur Gas Wells
摘要
Abstract
Coal mining disturbance and formation subsidence in Ordos Basin seriously threaten the wellbore integrity of adjacent natural gas wells,resulting in nearly 30％of production Wells in the development zone facing the risk of underground and surface leakage of natural gas,which brings huge security risks to the production of natural gas and coal mines in this region.In order to effectively reduce the safety production risks of natural gas wells in coal mining areas,based on the analysis of factors affecting wellbore integrity,the coupling model of structural unit elements and potential risk factors of wellbore integrity is constructed by using WBS-RBS matrix,and the index system of wellbore integrity risk evaluation is established.The combined weight coefficient is determined by analytic hierarchy process and entropy weight method.Based on the regret theory,the wellbore integrity risk assessment model is established to determine the main controlling factors and risk levels of natural gas wells in coal mining areas.The model validation analysis was carried out with Well PG 14 as an example,and corresponding management countermeasures were proposed.The results show that the results of wellbore integrity risk assessment based on regret theory are basically consistent with field practice,indicating that the method is feasible in the field of natural gas well integrity risk assessment in coal mining areas,and can effectively improve the objectivity of evaluation results,so as to guide the integrity risk management of natural gas wells in coal mining areas.关键词
煤矿开采/井筒完整性/风险评价/WBS-RBS矩阵/后悔理论/对策Key words
coal mining/wellbore integrity/risk assessment/WBS-RBS matrix/regret theory/countermeasure分类
能源科技引用本文复制引用
郭润生,余晓钟,高斐..煤矿采空区天然气井完整性风险评价及对策研究[J].西南石油大学学报（自然科学版）,2025,47(3):156-169,14.基金项目
国家自然科学基金企业创新发展联合基金(U19B6003) （U19B6003）
