通过对“三低”储层的研究，发现“三低”储层的岩电关系为一三次非线性的函数关系。分析了这种关系式与阿尔奇关系式的区别与联系，指出孔隙结构是决定岩电关系的主要因素。由于在“三低”储层情况下，矿化度的变化对岩电关系具有明显的影响，因此文中还给出了形成这种影响的解释及岩电关系与地层水电阻率之间的近似定量关系． Through the study of “three low” reservoirs, it is found that the rock-electric relationship of “three low” reservoirs is a third-order nonlinear function. The differences and relations between this relation and Archie’s relation are analyzed, and the pore structure is the main factor that determines the relationship between rock and electricity. Since the change of salinity has obvious influence on the relationship between rock and electricity in the case of “three low” reservoirs, the explanation for forming this kind of influence and the approximation between the geoelectric relationship and formation water resistivity are given Quantitative Relationship.