http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
NMRI methods for characterizing fluid flow in porous media
viii, 56 leaves : illustrations ; 28 cm.
0.15 mm 2 . The slice thickness is 5 mm. The data were then
a cylindrical pipe and glass bead packs. Two dimensional
a narrow pulse approximation concept was applied so that the
analyzed to find the localized velocities. The result showed
arbitrary cross sections with pixel sizes of the order of
because the relaxation times for fluids in porous media are
been carried out to measure velocities for fluid flows inside
can provide information about how fluid is transported in
catalytic chemical reactions involve the flow of fluids
derived for the proposed velocity imaging method. Compared
estimating absolute permeability which is an important
field gradient approach was proposed to measure the localized
For many years, there has been a considerable interest by the
images of the related phase shift values were obtained in
Imaging to velocity measurement. A stimulated echo pulse
investigated the application of Nuclear Magnetic Resonance
Many important processes such as petroleum production and
method allows longer observation time which is crucial
oil industry and geologists in the measurement and the
porous media. Furthermore, it provides the possibility of
prediction of flow permeability in rocks. We have
property used in modeling the flow of fluids in porous media.
that the method we proposed is appropriate for measuring the
the entire observation time. Preliminary experiments have
through porous media. The measurement of localized velocity
to the spin-echo pulsed field gradient method, the proposed
velocities of spins don't have to be assumed constant during
velocity in porous media. The velocity estimation model was
very small and the NMR signals decay very fast. Furthermore,
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