Pore-pressure gradient - Zamora
Input(s)
\(d_{c n}\): Normal dc (Modified Bit-Weight exponent in Bingham equation) exponent (dimensionless)
\(d_{c o}\): Observed dc (Modified Bit-Weight exponent in Bingham equation) exponent (dimensionless)
\(g_{n}\): Normal Pore Pressure Gradient \((\mathrm{psi} / \mathrm{ft})\)
Output(s)
\(g_{p}\): Pore Pressure Gradient \((\mathrm{psi} / \mathrm{ft})\)
Formula(s)
\[
g_{p}=g_{n}\left(\frac{d_{c n}}{d_{c o}}\right)
\]
Reference(s)
Watson, D., Brittenham, T., & Moore, P. L. (2003). Advanced Well Control (Vol. 10). Society of Petroleum Engineers, Page: 52.