Using NMR to determine pore throat distributionHaving obtained a Pc curve, pore throat distributions can now be calculated using the Washburn equations. The imbibition and secondary drainage curves generated by the NMR Pc measurement also allow USBM wettability to be predicted. Both of these calculations are integrated into the software, and follow as a natural consequence of the NMR Pc data. A further added advantage is that the NMR measurement is non-destructive and can use reservoir fluids and reservoir wettability.