Chapter 5: Displacement Efficiency Available to Purchase
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Published:2014
"Displacement Efficiency", Fundamentals of Enhanced Oil Recovery, Larry Lake, Russell T. Johns, William R. Rossen, Gary A. Pope
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The definitions of recovery, displacement, and sweep efficiencies in Eq. 2.88 apply to an arbitrary chemical component, but they are almost exclusively applied to oil and gas displacement. Because displacement efficiency and sweep efficiency are multiplied by each other, they are equally important to the magnitude of recovery efficiency and, hence, to oil recovery. In Chapter 6, we discuss volumetric sweep efficiency; in this chapter, we present fundamental concepts of displacement efficiency.
For the most part, we restrict our discussion to oil displacement efficiency based on solutions to the fractional-flow equation (Eq. 2.53). We apply these equations to displacements in 1D, homogeneous, isotropic permeable media. Therefore, the results apply most realistically to displacements in laboratory floods, which are the traditional means of experimentally determining displacement efficiency. These results do not, of course, estimate recovery efficiency for 3D, nonlinear flows without correcting for volumetric sweep efficiency and without correcting the displacement efficiency to account for differences in scale.
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