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.