Fluid Flow in Porous Media Studied by a Nuclear Magnetic Resonance Technique.
A nuclear magnetic resonance technique was used to determine the hydrocarbon content of a porous material during its displacement by an oil-miscible but hydrogen-free liquid (CCl(4)). After displacement of heptane by an amount of carbon tetrachloride equal to 1.5 times the pore volume, about 10 percent of the heptane remained, presumably in "dead-end" pores.
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