Geoelectrical response of a water bearing sandstone shale sequence and estimation of sand shale ratio

Abstract

An attempt has been made to use the geoelectrical response of a water bearing sandstone-shale sequence to estimate the sandstone-shale ratio. In all, 168 sandstone-shale sequence models were generated using Monte-Carlo simulation technique. The resistivity transform and its autocorrelation function of all the models were calculated. The amplitude, phase, power and log spectra Were also extracted. The power spectrum appears to hold promise in estimating the sand stone-shale ratio of these models because the power amplitude P₂ shows a high negative correlation with sandstone shale ratio values.