Hence, slim-tube tests should not be indicative of ultimate recovery, macroscopic sweep efficiency, transition zone length, etc., to be achieved in actual reservoir” It is not intended to simulate reservoir conditions. “The sand packed tube displacement apparatus is a device for bringing about multiple equilibrium contacts between simultaneous flowing fluids. The tube is packed with glass beads of a size on the order of 100 mesh or sand of a specific mesh size (the ratio of particle size to tubing diameter is sufficiently small (less than 1 / 10 ) that wall effect can be neglected,), so it is a one dimensional model of the reservoir. The slim tube is a narrow stainless-steel tube with an internal diameter (ID) of about 5 /16 in. Figure 5‑26 shows a schematic typical slim tube test apparatus. The first slim tube test has been run in the early 1950s. It is a laboratory test used to estimate the minimum miscibility pressure (MMP) or minimum miscibility concentration (MMC) of a given injection solvent and reservoir oil. Fundamentals of Fluid Flow in Porous MediaĬhapter 5 Miscible Displacement Determination of Miscibility Condition: Slim Tube Test
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