GLOSSARY

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Excerpt

Displacement efficiency defines the fraction of the initial pore-saturating fluid displaced in a the piston sweep by invaded fluid:

LaTeX Math Block
alignmentleft
E_D = 1- \frac{V_{HC, \ LEFT}}{V_{HC, \ INITITAL}} = \frac{1-s_{wi}-s_{orw}}{1-s_{wi}}

where 

LaTeX Math Inline
bodys_{wi}
 – inititial water in oil pay, 
LaTeX Math Inline
bodys_{orw}
 – residual oil to water sweep.