Superstatistics model for T2 distribution in NMR experiments on porous media

We propose analytical functions for T-2 distribution to describe transverse relaxation in high- and low-fields NMR experiments on porous media. The method is based on a superstatistics theory, and allows to find the mean and standard deviation of T-2, directly from measurements. It is an alternative to multi-exponential models for data decay inversion in NMR experiments. We exemplify the method with q-exponential functions and chi(2)-distributions to describe, respectively, data decay and T-2 distribution on high-field experiments of fully water saturated glass microspheres bed packs, sedimentary rocks from outcrop and noisy low-field experiment on rocks. The method is general and can also be applied to biological systems. (C) 2014 Elsevier Inc. All rights reserved.