Measurement of dielectric response of water‐saturated rocks

Abstract

We tabulate an extensive set of measurements of the complex permittivity (i.e., dielectric constant and conductivity) of brine saturated rocks in the frequency range 10–1300 MHz. Rather than listing the permittivity at each frequency, we present the parameters of a Cole‐Cole function used to fit the data for each rock sample. We choose the Cole‐Cole function for the following reason. The data sets from 271 rock samples were fitted to the commonly used functions in the literature, i.e., Cole‐Cole, Cole‐Davidson, and power law functions. We found that within experimental errors the fits to both the Cole‐Cole function and the power law represent the frequency dependence of the data better than the Cole‐Davidson function. Further, the Cole‐Cole function fits the data better at the high‐frequency end of our data. This result implies that five parameters of the Cole‐Cole function describe the frequency dependence of the complex permittivity of rock samples in the range 10–1300 MHz within experimental errors.