Surface Relaxivity Calculation using Nuclear Magnetic Resonance (NMR) Measurement, Three Dimensional (3D) Rock Model and NMR Response Simulation

摘要

The present invention is directed to a method to use nuclear magnetic resonance (“NMR”) to determine the surface relaxivity in a reservoir. The surface relaxivity can be used to calculate the pore size distribution in a reservoir.

主权项

1. A method to calculate a pore size distribution in a hydrocarbon reservoir, comprising:
determining a simulated T2 distribution; determining an experimental T2 distribution; determining the surface relaxivity with the simulate T2 distribution and the experimental T2 distribution; determining a pore size distribution with a surface relaxivity; and comparing the surface relaxivity with an experimental pore size distribution to determine the pore size distribution in the hydrocarbon reservoir.