Determination of Hydrocarbon Reservoirs Permeability Using Nuclear Magnetic Resonance Method

Nuclear magnetic resonance logging is considered to be a novel method for accurate access to the petrophysical parameters of hydrocarbon reservoirs in the oil industry. Using the presence of hydrogen nuclei in the reservoir fluids and employing the advantage of NMR method to determine the pore sizes، in this study، the bound water volume and free water volume of a carbonate well in the southwest of Iran have been determined in two ways and then، by using Coates and SDR models and Geolog software، NMR permeability was calculated. Similar results obtained from the two methods in determining the volume of bound fluid، with a correlation coefficient of 0. 9، show that the CBFV method for this well is valid. A correlation coefficient of 0. 7، obtained from the comparison of the NMR permeability and the core permeability، proves that the NMR technique can be a good alternative to the old costly methods.