北山预选区钻孔水文地质试验方法研究

Research on In-situ Hydraulic Test Method in Beishan Pre-selected Area

应用双栓塞钻孔水文试验设备开展钻孔水文地质试验的技术方案包含试验设计、试验实施、试验数据解译与综合分析等环节,可获取钻孔内渗透性参数随深度变化的特征,评估钻孔揭露构造的连通性、导水性与贮水性,调查深部地下水化学特征,是水文地质条件复杂的低渗透性岩体场址的调查与评价的必要手段。该试验方法不仅适用于放射性废物场址评价,还可应用于石油储备与二氧化碳处置等地下工程选址,在其他领域水文地质调查中也有一定应用前景。

Double packer equipment for hydraulic test can be used to measure pressure test zone directly,is frequently used to perform many kinds of hydraulic tests and take groundwater sample from borehole.Test design,implementation,data interpretation and synthetical analyzing are the main part of the in-situ hydraulic test with the double packer equipment.Parameter distribution of rock permeability along borehole can be got by following the test method.Connectivity,water conductivity and storativity of structure can also been estimated based on test results.Geochemical environment underground can also been investigated by groundwater sampling,which is the necessary for in-situ test in the field of site characterization and evaluation in lower permeability rock formation.The test method can not only be used for geological disposal of high level of radioactive waste,siting of underground facilities such as storage of petroleum and carbon dioxide,it can also been used for hydrogeological investigation in other fields.