Drilled gas entry rate

Input(s)

$d_{b}$: Bit Diameter (in.)

$R$: Penetration Rate $(\mathrm{ft} / \mathrm{h})$

$S_{g}$: Gas Saturation (fraction)

Ø: Formation Porosity (per cent)

p: Pressure (psi)

$z$: Gas Compressibility Factor (dimensionless)

$t$: time (h)

Output(s)

$q_{g s c}$: Drilled Gas Entry Rate (SCF/min)

Formula(s)

$$ q_{g s c}=\frac{d_{b}^{2} R Ø S_{g} p}{310 z T} $$

Reference(s)

Watson, D., Brittenham, T., \& Moore, P. L. (2003). Advanced Well Control (Vol. 10). Society of Petroleum Engineers., Page: 19.