Türkiye Jeoloji Bülteni

Permeability Estimation from Stoneley Waves in Carbonate Reservoirs

Abstract: Permeability is one of the petrophysical properties of oil, gas reservoirs is defined as the abilityof rock to transmit fluids through the porous media. After exploration of any reservoir, permeability information isnecessary to optimize the well completion method, oil, gas production  field development. Permeability isdetermined by both direct-indirect methods. Direct methods are core analysis, well testing, modular dynamictester (MDT) the indirect method is using well logging data such as nuclear magnetic resonance (NMR) porosity. Determination of permeability from the Stoneley slowness is one of the indirect continuous methodsin the whole well-bore has been chosen as the goal of this study. The result of this correlation has been plottedagainst other well logging data, there is a very good match between this result other petrophysical properties.Due to the complex nature of permeability in carbonate reservoirs, most of the time there is not a good matchbetween this parameter other petrophysical properties. This study has been conducted on the data of a singlewell correlation has been determined. The results show that in calculation of permeability from Stoneley waves,the effective parameters are porosity, lithology, Stoneley slowness accuracy of the MDT tool. For more precisecorrelation in a reservoir/ a specific geological area, more data from other wells/ reservoirs are necessary.