根据井壁电成像测井仪器工作原理和技术指标,用三维有限元法研制了全空间数值模拟程序,并运用该程序对单裂缝地层介质模型测井响应进行了模拟计算,考察了测井响应随裂缝张开度、电阻率对比度的变化关系及仪器对双平行裂缝的分辨率,建立了用井壁电成像测井资料定量评价裂缝张开度的公式,针对所建公式在模型井中进行了测井资料处理验证,其结果比国外的方法精确. According to the working principle and technical index of borehole electrical imaging logging tools, the full space numerical simulation program was developed by using the three-dimensional finite element method. The logging response of the single-fracture formation model was simulated by this program. The logging response With the relationship between the crack opening degree and the resistivity contrast and the resolution of the instrument for the parallel cracks, a formula to quantitatively evaluate the crack opening degree is established based on the borehole electrical imaging logging data. The logging data processing Verify that the result is more accurate than foreign methods.