根据电极法岩心电阻率测量原理及准静态电场理论,用三维有限元法编制了大直径岩心电阻率测量数值模拟程序,并运用该程序计算考察了裂缝对大岩心电阻率的影响。得出大岩心的电阻率随着裂缝与电场方向夹角的增大而增大,随着裂缝宽度的增加而降低。该结果可供大岩心实验系统和大岩心实验的研发参考。 According to the principle of electrode resistivity measurement and the theory of quasi-static electric field, the numerical simulation program of large-diameter core resistivity measurement was developed by using the three-dimensional finite element method. The influence of cracks on the resistivity of large core was investigated by using this program. The results show that the resistivity of large core increases with the angle between crack and electric field, and decreases with the increase of crack width. The results are available for large core experimental system and large core experiments for reference.