FRACTURE CHARACTERIZATION WITH NMR SPECTROSCOPIC TECHNIQUES

Determination of suitable techniques and analyses that can be implemen ted by NMR well logging can greatly improve the characterization of un derground petroleum reservoirs and aquifers. In this paper, the feasib ility for using various NMR methods for detection and characterization of fractures is explored. Analyses of experimental data obtained with a variety of samples are presented. It is shown that relaxation contr asts are useful for separating the signal contributions from fluids in the fractures and the porous matrix, and that relaxation weighting ca n be used in combination with other NMR techniques for enhancing fract ure characterization. (C) 1997 Academic Press.