Average wellbore fluid density (completion and workover fluids)

Input(s)

$\rho_{m}$: Measured Ambient (or Surface) Fluid Density (lbm/bbl)

$\Delta \rho_{i}$: Incremental Wellbore Fluid Density Change $(\mathrm{lbm} / \mathrm{bbl})$

$n$ : Number of Linear Depth intervals (dimensionless)

Output(s)

$\bar{\rho}$: Average Wellbore Fluid Density $(\mathrm{lbm} / \mathrm{bbl})$

Formula(s)

$$ \bar{\rho}=\rho_{m}-\left[\sum_{i=1}^{n} \frac{\left(\Delta \rho_{i}\right)}{n}-1\right] $$

Reference(s)

Bridges, K. L. (2000). Completion and Workover Fluids (Vol. 19). Society of Petroleum Engineers, Page: 46.