论文部分内容阅读
地下水质保护是一项重要的环保工作。地下水污染或污染的迁移取决于基岩特征和上覆沉积层类型。断裂、裂隙发育的基岩和渗透性强的沉积层为污染迁移提供了通道。应该避免选择这样的地段作为废物处理场所。 在对有害废物处理场所的研究中,井下物探的作用,可分为三个方面:1.场所的选择;2.污染范围的确定;3.对污染范围的长期监控。 通过岩石学、裂隙以及孔隙度的测定等井下物探技术,可以提供了解地下水文所需资料;通过伽马射线、电阻率、感应电导率、磁化率及激发极化等测井方法,可以获得岩石特征的资料;断裂、裂隙及其性质的测定,可以通过测径仪、密度法、电阻率法、温度和井下声波电视获得;孔隙度的测定由中子—中子法、电阻率法、密度法以及地震波速测井等方法获得;水质的测定可以通过自电、流体电阻、Eh和pH等测量方法进行。 上述所获得的物探资料,可以作为圈定污染范围的依据;根据污染引起的流体物理化学性质的变化,可进行污染迁移的长期监控。
Underground water quality protection is an important environmental protection work. Groundwater pollution or pollution migration depends on bedrock characteristics and overlying sediment types. Faults, fractured bedrock and highly permeable sediments provide a conduit for pollution migration. Such a lot should be avoided as a waste disposal site. In the study of hazardous waste disposal sites, the role of downhole geophysics can be divided into three aspects: 1. The choice of site; 2. The determination of the scope of pollution; 3. The long-term monitoring of the scope of pollution. Downhole geophysical techniques, such as petrology, fissures, and porosimetry, provide information needed to understand the groundwater; rocks can be obtained by logging methods such as gamma ray, resistivity, induced conductivity, magnetic susceptibility, and induced polarization The characteristics of fracture, fracture and their properties can be measured by caliper, density method, resistivity method, temperature and downhole acoustic wave. The porosity is determined by neutron-neutron method, resistivity method, density Method and seismic velocity logging. The water quality can be measured by self-electricity, fluid resistance, Eh and pH measurement. The geophysical data obtained above can be used as the basis for delineating the pollution range. According to the change of the physical and chemical properties of the fluid caused by the pollution, long-term monitoring of pollution migration can be carried out.