地热井抽水试验中井损的确定

地下水资源评价通常是对地热异常区域地热水可开采量进行估算,比较成熟的方法相对较少,多数是依照抽水试验资料,进而确定含水层水文地质参数,如渗透系数、导水系数、贮水系数、给水度等,水文地质参数确定的是否合理,直接影响到最终成果的可信度,进而关系到水资源论证评价的科学性。参数计算中为使计算结果更贴近实际,井损是一个不容忽视的问题,该文采用2种计算方法,结合多个工程实例抽水试验进行分析验算,选取相对准确的计算方法。

Determination of Well Loss in Pumping Test of Geothermal Well

The evaluation of groundwater resources is usually to estimate water exploitation quantity in geothermal anomaly areas. Mature method is relatively small. Major method is todetermine the hydrogeological parameters of aquifer in accordance with the pumping test data, such as permeability, transmissivity, storage coefficient and degree of water supply. Determination of hydrogeological parameters is reasonable or not will directly affect the final results of the credibility, and in relation to scientific evaluation of water resources demonstration. In calculating the parameters, in order to make the calculation results more close to reality, well losscan not be ignored. In this paper, 2 kinds of calculation methods have been calculated. Combining with pumping test analysis and calculation, a relatively accurate calculation method should be choosed.