Comparison between Stoneley and NMR permeability of a post-salt carbonate reservoir in the Campos Basin

Abstract

The characterization and management of an oilfield requires knowledge about petrophysical properties of hydrocarbon reservoirs, which they are extreme important. Among several properties stands out permeability. This paper evaluated a post-salt carbonate reservoir located in the Campos Basin and has purpose to compare permeabilities estimated from full wave acoustic logs (Stoneley wave) and NMR logs. The NMR permeability has been estimated from Timur-Coates empirical model. In the case of the full wave acoustic log, Stoneley permeability is obtained from Stoneley wave travel-time and attenuation that are directly related to formation permeability. The Stoneley and NMR permeabilities was compared and, the permeability results have been shown very good correlation for these two different methods.