Hydrostatic pressure decrease at total depth caused by gas-cut mud
Input(s)
MG: Mud Gradient (psi/ft)
\(\mathrm{C}\): Annular Volume (bbl/ft)
V: Pit Gain (bbl)
Output(s)
P: Reduction in Bottomhole Pressure (psi)
Formula(s)
\[
\mathrm{P}=\left(\frac{\mathrm{MG}}{\mathrm{C}}\right) * \mathrm{~V}
\]
Reference(s)
Lapeyrouse, N. J., 2002, Formulas and Calculations for Drilling, Production and Workover, Second Edition, Gulf Professional Publishing, Page: 129.