多尺度条件下ERT视电阻率模型建立及其有效性分析

Establishment of ERT apparent resitivity model under multi-scale conditions and its effect analysis

针对三种不同空间尺度的介质体模型,通过采用数值模拟实测数据的方法,探讨了根据实测数据建立视电阻率模型的方法,并通过与真实电阻率模型对比,分析了视电阻率模型的有效性。结果表明:虽然在数值上视电阻率模型与介质的真实电阻率有较大的偏差,但视电阻率的空间分布格局能够较好的反应真实电阻率的空间分布特征。从而说明建立的视电阻率模型在初步认识介质特性在空间分布上的特征方面是有效的,但要全面了解介质真实电阻率分布特性后期的反演计算仍不可缺少。

According to the material models in three different space scales, adopting the method of numerical simulation, the paper discusses the ways and means of constructing apparent resistivity models and analyzes the validity by comparing with the true resistivity models. The results indicate that the distribution of apparent resistivity modes could preferably accord with the true reisitivity models in space model on certain conditions except for the differences between the values in some certain regions. Furthermore, it is proved that the established apparent resistivity models are effective in recognizing the characters of the materials, but the subsequent inverse calculation is still inevitable for the fully understanding of the resisitivity distribution of the material.