地下石洞油库防渗注浆圈特征参数对水封性能影响研究OA
Research on influence of characteristic parameters of impermeable grouting ring on water-sealing performance of underground rock cavern oil storage
地下水封石洞油库是储存石油的首选技术,洞库围岩注浆是保障其水封性能的重要手段.明确洞室周边注浆后的浆石体,即防渗注浆圈的渗透系数与几何厚度参数,不仅对控制油气扩散具有关键作用,同时可减少洞室涌水量,提升工程经济效益,实现水封性与经济性的动态平衡.以中国某地下水封石油洞库工程项目为研究背景,采用有限元数值模拟方法建立二维的油气两相流模型,系统揭示了两个特征参数对洞库水封性能的影响规律.研究结果表明:地下石洞油库设置防渗注浆圈后,油气扩散区域和洞室涌水量均得到有效控制,油气扩散区域与渗透系数呈正相关,与防渗注浆圈厚度呈负相关;油气扩散区域与储油运行时间整体呈正幂函数关系.设置防渗注浆圈后,洞室涌水量相比设置防渗注浆圈前大幅度减小;涌水量空间分布遵循顶板>边墙>底板的衰减规律;运营期洞室涌水量较施工期变小;洞室涌水量与防渗注浆圈厚度呈负相关.基于研究结果,针对该地下水封石油洞库工程,确定防渗注浆圈最优参数为渗透系数8.64×10-5 m/d、厚度14 m,此时洞室水封性能得到保证,同时实现最优经济效益.研究成果可为水封油库工程设计及渗控措施制定提供参考.
Underground water-sealed rock caverns serve as a primary method for petroleum storage,where grouting is essential for ensuring water-sealing performance.This study investigates how the permeability coefficient and thickness of the impermeable grouting ring influence containment efficiency.Based on a Chinese underground oil storage project,a two-dimensional oil-gas two-phase flow model is developed using finite element simulation.Results demonstrate that the grouting ring effectively controls both hydrocarbon diffusion and water inflow.Hydrocarbon diffusion increases with permeability and decreases with ring thickness,expanding over time following a power function.Water inflow reduces significantly after grouting,it distributes as crown>sidewall>invert,and decreases further with greater ring thickness.The optimal parameters are identified as a permeability coefficient of 8.64×10⁻⁵ m/d and a thickness of 14 m,achieving both effective sealing and economic benefits.These findings provide practical guidance for designing similar water-sealed storage facilities.
迟嘉宁;郤保平;董赟盛;韩福芝;武雪晴;葛一洋
太原理工大学矿业工程学院,山西 太原 030024太原理工大学矿业工程学院,山西 太原 030024||原位改性教育部重点实验室,山西 太原 030024太原理工大学矿业工程学院,山西 太原 030024太原理工大学矿业工程学院,山西 太原 030024太原理工大学矿业工程学院,山西 太原 030024太原理工大学矿业工程学院,山西 太原 030024
建筑与水利
地下水封洞库防渗注浆圈水封性涌水量油气扩散
underground water-sealed cavernimpermeable grouting ringwater-sealing performancewater inflowHydrocarbon diffusion
《岩土工程学报》 2026 (6)
1282-1291,10
国家自然科学基金联合重点项目(U24A2089)山西省自然科学基金项目(202303021211042,202303011222006)This work was supported by the National Natural Science Foundation of China(Grant No.U24A2089)and Major Science and Technology Projects in Shanxi Province(Grant Nos.202303021211042,202303011222006).
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