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A New Method for Calculating Permeability Using NMR T2 Distribution
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 78th EAGE Conference and Exhibition 2016, May 2016, Volume 2016, p.1 - 5
Abstract
Summary
A theoretical equation of calculating permeability through NMR transverse relaxation time (T2) distribution is derived according to Poiseuille’s equation, Darcy’s law, Archie’s equation and the relationship between NMR T2 distribution and pore throat radii, on condition that the porous media are disconnected tortuous capillary tubes with different radii. The average value of effective T2 which controlled the permeability was calculated to obtain permeability using the new equation derived in this paper. Results from NMR experimental data and NMR logging data in tight sandstone reservoirs confirmed that this method has a good performance in permeability estimation.
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