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在芬兰南部洛维萨(Loviisa)核电站场地上进行了一些野外试验,用以估计本地基岩对于排放中、低度放射性反应堆废物的适用性。井下地球物理研究的目的是估算在相对均匀的花岗岩中裂隙带的几何形状和性质。在单井方法中,倾角测井法一般用来测定各组裂隙的走向。而声波测井法则用以估算裂隙的开合程度(宽度或厚度)。井间方法(例如地震法和充电法)是用来测量井之间裂隙带的几何形状和连续性。通常,估算单个破裂系的连续性是不可能的。但是,利用倾角测井法可分辨出裂隙系统。综合利用单井和井问方法的结果可以估算出裂隙带的连续性。
Field trials were conducted at the Loviisa plant site in southern Finland to assess the applicability of local bedrock to the emission of low and medium radioactive waste from reactors. The purpose of the downhole geophysical study is to estimate the geometry and properties of the fractured zone in a relatively uniform granite. In the single-well method, dip logging is generally used to determine the strike of each group of fractures. The acoustic logging method is used to estimate the degree of opening and closing (width or thickness) of a fracture. Crosswell methods (such as seismic methods and charging methods) are used to measure the geometry and continuity of the fractured zone between wells. In general, it is not possible to estimate the continuity of a single rupture system. However, the dip system can be distinguished by dip logging. The comprehensive utilization of the results of single-well and well-logging methods can estimate the continuity of the fractured zone.