ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Nuclear magnetic resonance (NMR) imaging techniques are used to determine porosity and saturation distributions. Difficulties in quantitation which arise from the short transverse relaxation times exhibited by fluids in porous media are addressed. Procedures are presented whereby transverse relaxation during the signal acquisition process is modeled to obtain accurate estimates of intrinsic magnetization intensity, and thus porosity and saturation. Special consideration is given to saturation/position dependence and multiexponential behavior of transverse relaxation. These procedures are validated with results for longitudinal profile images. The use of thin-slice cross-sectional profile images are demonstrated by observing fluid displacement in a rock sample with structural heterogeneities.
Additional Material:
11 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690390602
