多浓度下泥质砂岩电学性质实验研究

依据多浓度岩石电性实验，研究不同浓度下泥质砂岩的束缚水相对体积及其导电特性，可以揭示束缚水饱和度和地层水浓度的变化所引起的泥质砂岩导电特性的变化。研究表明，不同浓度下的泥质砂岩有不同的束缚水饱和度，而且随饱和溶液浓度的增大而减小。束缚水条件下岩石的电阻率受地层水电阻率、束缚水饱和度、泥质附加导电性影响，在地层水浓度较低情况下，由于较高的束缚水含量和泥质附加导电性，岩石的电阻率也可能呈现低电阻率特征。

Experimental research on electrical properties of shaly sand under different sal inity.

On the basis of electrical experiment of rocks in different salinity,performin g the study for relative volume of bound water in shaly sand under different sal inity and its electrical properties is to reveal the change of electrical proper ties in shaly sand caused by variation of bound water saturation and formation w ater salinity.The study showed that the shaly sand in different salinity of sa turated fluid has different bound water saturation,and decreasing the bound wa ter saturation with increasing the salinity of saturated fluid.The resistivity of rock under the condition of bound water is under the influence of resistivit y of formation water,bound water saturation and shaly additional conductivity. In a condition of lower formation water salinity,the resistivity of rock may appear low resistivity property because of higher bound water content and shaly additional conductivity.