| abstract |
Methods for investigating a sample containing hydrocarbons are provided, subjecting the sample to a nuclear magnetic resonance (NMR) sequence using NMR equipment, using NMR equipment to detect signals from the sample in response to the NMR sequence, analyzing the signals for extract a distribution of relaxation times (or diffusions) and calculating a value for a parameter of the sample based on at least one of the relaxation times (or diffusions), where the calculation uses a correction factor that modifies the value for the parameters depending on the relaxation time for at least short relaxation times (or on the basis of diffusion for at least large diffusion coefficients). |