Abstract Site monitoring provides not only critical information for the safe operation of underground facilities but also important data for characterizing the groundwater flow within heterogeneous rock masses. Site monitoring and statistical analysis were performed to ascertain the groundwater response to oil storage in the Huangdao pilot large-scale underground oil storage facility. An all-sided monitoring scheme was designed and implemented for the assessment of the performance of the facility. The groundwater level and pressure along with rainfall, storage pressure, water curtain level were obtained with the monitoring system. The containment property was assessed according to the monitoring results, showing that the containment property of the facility can be maintained under operational conditions. Autocorrelation and cross-correlation analyses of the monitored data were performed to investigate the quantitative relations of the groundwater response to the rainfall amount, water curtain level and storage pressure. The correlation coefficients and time delays of the groundwater responses to the rainfall amount, water curtain level and storage pressure were obtained through statistical analysis. Evidently, the influence of rainfall on both the groundwater level and the groundwater pressure is insignificant. The groundwater pressures in the upper cavern pillars are influenced mainly by the water curtain system, while the groundwater pressures in the lower cavern pillars are influenced by the storage pressure. The hydrogeological conditions determine the time delays of the groundwater level and groundwater pressure responses to the water curtain level and storage pressure. Eventually, it was concluded that the groundwater response to oil storage in rock caverns with a water curtain system is related to both the geometrical layout and the hydrogeological conditions of the facility.

中文翻译：

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具有水幕系统的大型岩洞储油对地下水的响应：现场监测和统计分析

摘要 现场监测不仅为地下设施的安全运行提供关键信息，而且为表征非均质岩体中的地下水流提供重要数据。通过现场监测和统计分析，确定了黄岛试点大型地下储油设施中地下水对储油的响应。为了评估设施的性能，设计并实施了全方位监测计划。通过监测系统获得地下水位和压力以及降雨量、蓄水压力、水幕水位。根据监测结果对密闭性进行了评估，表明该设施的密闭性可以在运行条件下保持。对监测数据进行自相关和互相关分析，研究地下水响应与降雨量、水幕水位和蓄水压力的定量关系。通过统计分析得到地下水响应与降雨量、水幕水位和蓄水压力的相关系数和时滞。显然，降雨对地下水位和地下水压力的影响都不显着。上部洞柱地下水压力主要受水幕系统影响，下部洞柱地下水压力受蓄水压力影响。水文地质条件决定了地下水位和地下水压力对水幕水位和蓄水压力响应的时间延迟。最终得出结论，具有水幕系统的岩洞储油对地下水的响应与设施的几何布局和水文地质条件有关。