盐穴储气库地质体完整性管理体系

integrity management system for geological body of salt-cavern gas storage

在储气库完整性管理中储气库地质体的完整性管理必不可少。目前,储气库地质体完整性管理概念不清、界面模糊、体系不健全,且仅局限于气藏储气库完整性评价方面。为此,在分析气藏储气库地质体相关研究成果的基础上,提出盐穴储气库地质体概念,建立盐穴储气库地质体完整性管理体系。结果表明:储气库地质体完整性管理体系由以危害因素识别与资料分析为基础,风险评价与完整性评价为核心的4项内容组成;盐穴储气库地质体风险分析以盐腔体积收缩率、天然气渗漏量及地面沉降量3项指标的分析为主;盐穴储气库地质体完整性评价技术系列由盐腔与地面稳定性、断层稳定性、夹层与盖层完整性评价3项技术构成。盐穴储气库地质体完整性管理体系的建立弥补了储气库完整性管理体系中地质体管理的缺失,为储气库的安全运行管理提供了技术支撑与新的应用方向。

The geological body management of gas storage is essential for the integrity management of Underground Gas Storage(UGS).However,the integrity management of geological body of gas storage is unclear in concept with fuzzy interface and incomplete system at present,and it is also limited to the integrity evaluation of gas reservoir UGS.Therefore,the concept of geological body of salt-cavern gas storage was defined based on the analysis of research results related to the geological body of gas reservoir UGS,and an integrity management system for geological body of salt-cavern gas storage was established.The results indicate that(1)the integrity management system for geological body of gas storage comprises 4 items,which are based on the hazard identification and data analysis and centered on the risk evaluation and integrity evaluation.(2)The risk analysis for geological body of salt-cavern gas storage focuses on the analysis of the 3 indicators,i.e.,salt cavern shrinkage,gas leakage and land subsidence.(3)The salt-cavern storage integrity evaluation is composed of 3 major evaluation technologies,i.e.,stability evaluation of salt cavern and surface,fault stability evaluation,and integrity evaluation of interbed and caprock.In conclusion,the establishment of the integrity management system for geological body of salt-cavern storage complements the shortage of geological body management in UGS integrity management,and also provides technical support and new application direction for the safe operation management.