电测井和油气层关系的一个理论公式

Theoretical formula of the relationship between electrical well logging and the hydrocarbon zone

为研究电测井和油气层的关系,根据电场理论,将砂岩电导率定义为地层水电导率、含量、相对电场强度的积.提出电介质颗粒面电荷与电偶极子等效的认识,进一步得出砂岩的电场方程.解砂岩电场方程得出相对电场强度表达式,将其带入砂岩电导率定义得电测井和油气层天系的一个理论公式,并用实验资料验证了公式的有效性.

The relations between the electric logging and the hydrocarbon zone are researched in this paper. On the basis of the electricfield theory, the sandstone conductivity is defined as the product of the formation water conductivity, content and relative electric-field intensity. It is recognized that the dielectric grain surface charges are equivalent to the electric dipole, and the sandstone electric-field equation is further derived. The expression of the relative electric-field intensity is derived by solving the sandstone electric-field equation and then put into the sandstone conductivity definition to derive a theoretical formula of the relations between the electric logging and the hydrocarbon zone. The validity of the formula has been checked by experimental data.