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为了解决在复杂地电条件下电法勘探中场的计算,近十年来,国内外发展了电法勘探正演计算的数值模拟方法,或者称为计算机模拟,其中一个比较活跃的领域就是有限单元法。电法勘探中场的正演计算就是给定地电条件和供电电源的位置,计算地下和地面的电位分布。例如对电阻率法就是给定地下的电阻率(或导电率)的分布和地形形状,计算电位的分布,进而对于具体的供电和测量电极装置计算视电阻率值,这种正演计算是反演计算的基础。但遗憾的是直流电法正演的解析计算往往很困难,对许多地电剖面情况甚至不可能求解
In order to solve the calculation of midfield in electrical exploration under complex geoelectric condition, in recent ten years, numerical simulation method for forward calculation of electrical prospecting has been developed at home and abroad, or computer simulation. One of the most active fields is finite element law. The forward calculation of the mid-field of electric prospecting is to calculate the potential distribution of the underground and the ground, given the geoelectric conditions and the location of the power supply. For example, the resistivity method is to calculate the distribution of resistivity (or conductivity) and the topography of a given subterranean formation, to calculate the distribution of potentials and hence to calculate the apparent resistivity value for a specific supply and measurement electrode arrangement. This forward calculation is inverse The basis of the calculation. However, it is regrettable that the analytical calculation of direct current method forward modeling is often difficult and even impossible to solve for many geoelectric profiles