Spacer volume behind slurry required to balance the plug
Input(s)
\(\mathrm{C}_{\mathrm{a}}\): Annular Capacity \((\mathrm{ft} / \mathrm{bbl})\)
E: Excess Volume (fraction)
\(\mathrm{V}_{\mathrm{a}}\): Spacer Volume Ahead \((\mathrm{bbl})\)
\(\mathrm{C}_{\mathrm{p}}\): Capacity of Pipe or Tubing \((\mathrm{bbl} / \mathrm{ft})\)
Output(s)
\(\mathrm{V}_{\mathrm{s}}\): Spacer Volume (bbl)
Formula(s)
\[
\mathrm{V}_{\mathrm{s}}=\left(\frac{\mathrm{C}_{\mathrm{a}}}{\mathrm{E}}\right) * \mathrm{~V}_{\mathrm{a}} * \mathrm{C}_{\mathrm{p}}
\]
Reference(s)
Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 62.