New Method of NMR Signals Fitting Using ‘Distribution’ Program

In this paper we extend methodology of NMR signal analysis. We propose a new method to compute T2 cut-offs from NMR measurements. Fitting theoretical curves into measured signals is the most important step in NMR signals analysis. In literature we can find standard T2 cut-offs which separate rock pore space. Unfortunately, standard cut-offs value often are different then real value for specific rock type. ‘Distribution’ program was developed for dividing rocks with respect to the type of pore space, on the basis individual T2 cut-offs. New, improved method of processing NMR data based on special fitting of several selected exponents was applied to enhanced division of porosity into parts occupied by free water, capillary water and bound water.