【摘要】 感应测井的实部视电导率 (也叫R信号 )与虚部视电导率 (也叫X信号 )构成复视电导率。在给出这两种视电导率定义之后 ,利用解析解和数值模式匹配法计算了几种地层的感应测井的两种视电导率响应曲线。得出的主要结论有 :虚部视电导率对实部视电导率起一定的趋肤效应补偿作用 ;虚部视电导率的探测深度大于实部视电导率 ;井眼对实部视电导率的影响较大 ;实部视电导率的纵向分辨率优于虚部视电导率 ;当线圈系穿过的地层磁导率有变化时 ,虚部视电导率将有较大的波动。更多还原

【Abstract】 The complex apparent conductivity of induction log consists of R-signal (resistive signal) and X-signal (reactive signal), which are defined in uniform medium. The analytic solutions and the forward programs of the numerical mode-matching method(NMM) of induction log are applied, and the response curves of some formation models are computed, and the main conclusions we obtain are as follows: X-signal can compensate R-signal for skin effect; the investigation depth of X-signal is greater than that of R-signal; borehole’s effect on R-signal are big; the vertical resolution of R-signal is better than that of X-signal; magnetic formations can cause significant perturbations on X-signal.更多还原