Practical Method for Analysis of Immiscible Displacement in Laboratory Core Tests

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An accurate analytical interpretation method to determine the Leverett function (fw and its derivative (fw′ from immiscible displacement data in core plugs is presented. Linear equations are developed to describe the displacement processes occurring before and after breakthrough. A quadratic function is introduced to represent the saturation distribution along the cores. The relationships derived in this study can be used for analysis of core tests involving constant injection rates and constant pressure differences. The applicability, practicality, and accuracy of the new analytical method are verified by means of the experimental data obtained in the present study and by those reported in the literature.

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