In Situ Permeability Estimation: A Comparison Between Acoustic And NMR Logs

Abstract

Permeability estimates from acoustic logs (Stoneley waves) and NMR logs were compared using data from a geologic section consisting of sandstone and shale beds. The permeability results show very good correlation for these two different methods. Data from a gas-bearing zone shows high permeability values from acoustic data and low values from NMR. The difference between these two permeability results can be used as a gas zone indicator.