大岩心电阻率测量响应的数值模拟

Numerical Simulation on Resistivity Measurement of Big Core

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。

Based on principle of measuring core resistivity with electrode method and theory of quasi-static electric field, programmed with 3D finite element method is a program for simulating measurement of resistivity of the big core. By the program, some effects of fracture to resistivity of the big core are calculated and surveyed. The relationship between resistivity and fracture of the big core is that the resistivity increases with increasing angle between directions of fracture and electric field, and decreases with increasing fracture width. The result might be referred for researching and developing experimental system and experiment of big core.