QUANTITATIVE 1D SATURATION PROFILES ON CHALK BY NMR

Quantitative one-dimensional saturation profiles showing the distribut ion of water and oil in chalk core samples are calculated from NMR mea surements utilizing a 1D CSI spectroscopy pulse sequence. Saturation p rofiles may be acquired under conditions of fluid flow through the sam ple, Results reveal that strong saturation gradients exist in chalk co re samples after core floods, due to capillary effects. The method is useful in analysis of corefloods, e.g., for determination of capillary pressure functions. Copyright (C) 1996 Elsevier Science Inc.