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该文从均匀半空间及水平层状均匀介质的电磁场分布特征出发,阐述了近场及过渡场区即非波区测深曲线的特点及畸变的原因,之后又从电磁场的统一性出发,分析了水平电偶源频率测深中基于Ex分量的全区视电阻率的算法原理和具体定义,并建立了模型来验证算法的可行性及稳定性。分析表明,基于Ex分量的全区视电阻率,可明显地改善波区视电阻率在近场及过渡场的畸变,较为形象、直观地反映出了地电断面的电性变化情况。
Based on the characteristics of the electromagnetic field distribution in a uniform half-space and horizontal layered homogeneous medium, the characteristics of the sounding curve in the near-field and transitional areas, that is the non-wave zone, and the causes of the distortion are described. Then, starting from the unity of electromagnetic fields, The principle and definition of the apparent resistivity in the whole region based on the Ex component in the horizontal dipole frequency sounding are discussed. The model is established to verify the feasibility and stability of the algorithm. The analysis shows that the apparent resistivity of the whole area based on the Ex component can obviously improve the apparent resistivity of the waveband in the near field and the transition field, and it can vividly reflect the electrical change of the geoelectric section.