# Increase volume by hematite

## Input(s)

\(W_{1}\): Initial Mud wt. (ppg)

\(W_{2}\): Required mud wt. (ppg)

## Output(s)

V: Volume increase per \(100 \mathrm{bbl}(\mathrm{bbl} / 100 \mathrm{bbl})\)

## Formula(s)

\[
V=100 * \frac{W_{2}-W_{1}}{40-W_{2}}
\]

## Reference(s)

Formulas and Calculations for Drilling, Production and Workover, Second Edition, Lapeyrouse, Page: 82.