Patent Document ID: 9291690
Application ID: 13530766
Patent Flag: 1

Claim One:
1. A computer-implemented method of determining molecular structures of organic molecules in a geological formation, the method being implemented in a computer system comprising one or more physical processors configured to execute computer program modules, the method comprising: obtaining a plurality of chemical shift spectra derived from nuclear magnetic resonance measurements taken at the geological volume of interest for a plurality of different lengths of a mixing time, wherein a given chemical shift spectrum has been derived from nuclear magnetic resonance measurements for a mixing time that corresponds to the given chemical shift spectrum and wherein the nuclear magnetic resonance measurements are obtained in a regular cross polarization experiment under magic angle spinning with a plurality of different contacting times during a mixing period; applying a transformation to the plurality of chemical shift spectra that yields a multi-dimensional distribution of intensity as a function of chemical shift and one or more dynamic parameters of the nuclear magnetic resonance measurements, wherein the transformation is applied individually to separate sets of chemical shift measurements having common chemical shift values such that the transformation comprises for a given chemical shift value and wherein the multi-dimensional distribution is three-dimensional, and wherein the one or more dynamic parameters comprise a rotating frame longitudinal relaxation time and a cross polarization transfer time constant; obtaining, from across the plurality of chemical shift spectra, the measurements of intensity at the given chemical shift value and the values of the mixing time at which the measurements were obtained; and inverting the measurements of intensity at the given chemical shift to provide intensity as a function of the one or more dynamic parameters for the given chemical shift, wherein such inversion comprises performance of a Laplace transform; and determining molecular structures of the organic molecules in the geological formation based on an analysis of the multi-dimensional distribution of intensity and its shape.