中文摘要：

地下水封洞库渗流场分析和渗水量预测是水幕系统水封效果评价的核心内容,目前多采用连续等效模型进行这类大范围的渗流场分析,分析结果是否可靠的关键在于能否合理、可靠地获取裂隙岩体的等效渗透参数。施工期进行了大量的与水幕孔有关的现场水力学试验,可以用于分析和确定岩体等效渗透参数,但试验的理论背景、试验过程的合理性和数据分析方法还有待深入研究。首先简要介绍了黄岛石油储备洞库工程的4种水幕孔现场水力学试验的试验过程和特点;然后,采用三维渗流数值分析方法,研究了施工期因水幕廊道排水作用对水幕孔围岩渗流场的影响。基于施工期水幕孔注水试验,在达西流假定下,建立了围岩等效渗透系数与水幕孔注水量的经验关系,由此,可以根据水幕孔注水量反算出围岩等效渗透系数。采用裂隙-孔隙渗流分析模型,对比解释了裂隙不同发育特征对水幕孔注水量及岩体宏观渗透参数的影响。最后,对实测试验资料进行了分析,获得了水幕系统围岩等效渗透系数分区图。研究结果对水幕孔有关的渗透性试验的理论分析、裂隙岩体渗透参数取值研究等具有参考价值。

英文摘要：

Analysis of seepage field and prediction of the quantity of inflow towards hydrocarbon storage caverns are the core issues associated with evaluations of water-sealed effects of a water curtain. Nowadays, equivalent continuum models are predominately used in analyzing this kind of large-scale seepage field; and the reliability of analysis results depends on whether or not the equivalent permeability of rock masses can be reasonably and reliably obtained. A great number of in-situ hydraulic tests concerning water curtain boreholes are conducted during the construction stage. Based on these tests, the equivalent permeability of rock masses can be analyzed and determined. However, the issues of theoretical background of test, the rationality of experiment procedure and the analysis of experiment data need to be studied in depth. Firstly, the procedures and features of four kinds of in-situ hydraulic tests about water curtain boreholes are presented, which are conducted in the Huangdao water-sealed oil storage cavern project in China. Secondly, the impacts of drainage of water curtain galleries on the seepage fields during construction are investigated by using a three-dimensional seepage numerical analysis method. Based on the water injection tests of water curtain borehole during construction, an empirical relation between the equivalent permeability of rock mass surrounding the water curtain boreholes and water injection rate is established under the Darcy flow postulation. According to the relation, the permeability of rock mass can be inverse calculated, the influences of various fracture formations on both the injection rate and the rock permeability are also analyzed by using a fractured porous flow model. At last, the practical test data is analyzed and the partition map of the permeability of rock masses is accomplished. The research results are of reference values for both the theoretical analysis of hydraulic tests regarding water curtain boreholes and parameterization of permeability of rock masses.