不接触电极复电阻率法仿真与实验(英文)

Simulations and tests of non-contact electrode method for complex resistivity exploration

岩利用电性参数的频散特性进行地层评价是目前定义的复电阻率勘探的主要特点,国内外已经有人在实验室内进行了复电阻率测量,但均未从仪器的角度进行讨论,因此,引入不接触电极电法复电阻率探测方法。对基于损耗角正切测量的复电阻率探测进行仿真计算,特别是相对介电常数随频率变化的模型进行仿真,使复电阻率探测更接近实际地质情况。选择合适的人工模型和已知的地质构造,进行了复电阻率探测实验,验证该方法的可行性和有效性。

Employing dispersive electric parameters for geologic structure evaluation is the main feature of complex resistivity exploration. Both in China and abroad, some researchers have already studied complex resistivity measurement in laboratories, but there is no discussion from the viewpoint of instrumentation. Therefore, non-contact electrode method for complex resistivity exploration is introduced in this paper. Based on measurement of loss tangent, computer simulations, especially simulation for relative dielectric permittivity varying with frequency, are used to make complex resistivity exploration closer to real geologic structure. Tests of complex resistivity exploration on appropriate artificial model and known geologic structure have been made. The results have verified the feasibility and effectiveness of this method.