HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Abstract Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in ISI Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by Chen, Q. Articles by Oswald, S. Search for Related Content PubMed PubMed Citation Articles by Chen, Q. Articles by Oswald, S. GeoRef GeoRef Citation Agricola Articles by Chen, Q. Articles by Oswald, S. Related Collections Ground Water Quality Water Pollution

Nuclear Magnetic Resonance Imaging for Studies of Flow and Transport in Porous Media

Swiss Federal Institute of Technology Zurich, Institute of Hydromechanics and Water Resources Management, ETH-Hoenggerberg, CH-8093 Zurich, Switzerland

View larger version (111K): [in a new window]   Fig. 1. Porosity image of bead pack column (diameter 2.5 cm).

View larger version (14K): [in a new window]   Fig. 2. The flow imaging pulse sequence. RF, radio frequency; GR, read gradient; GP and GS, phase-encoding gradients; GF, flow-encoding gradient; TE, echo time; rt, ramp time; Gi, magnitude of the gradient pulse.

View larger version (108K): [in a new window]   Fig. 3. Velocity image of bead pack core.

View larger version (18K): [in a new window]   Fig. 4. Relationship between velocity and porosity.

View larger version (201K): [in a new window]   Fig. 5. Two-dimensional proton-density image of artificial sandstone (sample size 6.4 x 6.4 cm).

View larger version (30K): [in a new window]   Fig. 6. Histogram of voxel porosity distribution.

View larger version (47K): [in a new window]   Fig. 7. Comparison of fluid distributions (black box simulation at left, nuclear magnetic resonance imaging [NMRI] experiment at right) during water flooding.

View larger version (58K): [in a new window]   Fig. 8. Experimental setup for density flow experiments.

View larger version (64K): [in a new window]   Fig. 9. Three-dimensional nuclear magnetic resonance (NMR) image of finger distribution (50% contour, saltwater above, fresh water below).

View larger version (42K): [in a new window]   Fig. 10. Three-dimensional computation of finger distribution (50% contour, salt water above, freshwater below).

View larger version (29K): [in a new window]   Fig. 11. View of model used in the upconing experiments.

View larger version (112K): [in a new window]   Fig. 12. Nuclear magnetic resonance (NMR) image of saltwater distribution in a diagonal plane at different times for the low-concentration contrast experiment (height of section = 20 cm, width of section = 38 cm).

View larger version (113K): [in a new window]   Fig. 13. Nuclear magnetic resonance (NMR) image of salt water distribution in a diagonal plane at different times for the high-concentration contrast experiment (height of section = 20 cm, width of section = 38 cm).

View larger version (57K): [in a new window]   Fig. 14. Image distortion by shielding effects (left) in the high-concentration experiment and correction (right) (height of section = 20 cm, width of section = 38 cm).