注水往往会使地层水的矿化度变化很大,这样就排除了定量解释电阻率测井的可能。从原理上说,介电测井很适宜用来估计水驱油藏的剩余油饱和度,因为介电测井对矿化度的变化不象电阻率测井那样敏感。但是,矿化度对介电测井的影响也是很大的,而以前发表的解释技术都没有充分地考虑到这些影响。 Water flooding often changes the salinity of formation water greatly, thus eliminating the possibility of quantitative interpretation of resistivity logs. In principle, dielectric logging is well suited for estimating residual oil saturation in waterflood reservoirs, since dielectric logging is less sensitive to changes in salinity than resistivity logging. However, the effect of mineralization on dielectric logging is also substantial, and none of the previously published interpretation techniques adequately considered these effects.