3. Drilling Fluids

Table of Content

1. Increase Mud Weight
2. Dilution
3. Mixing Fluids of Different Densities
4. Oil Based Mud Calculations
5. Solids Analysis
6. Solids Fractions
7. Dilution of Mud System
8. Displacement - Barrels of Water/Slurry Required
9. Evaluation of Hydrocyclone
10. Evaluation of Centrifuge

3.2 Dilution

Mud weight reduction with water

$\text{Water, bbl}=\frac{V_1\times (W_1-W_2)}{W_2-D_w}$

Example: Determine the number of barrels of water weighting 8.33 ppg (D_w) required to reduce 100 bbl (V₁) of 14.0 ppg (W₁) to 12.0 ppg (W₂):

$\text{Water, bbl}=\frac{100\times (14.0-12.0)}{12.0-8.33}$
Water = 54.5 bbl

Mud weight reduction with diesel oil

$\text{Diesel, bbl}=\frac{V_1\times (W_1-W_2)}{W_2-D_w}$

Example: Determine the number of barrels of diesel weighing 7.0 ppg (D_w) required to reduce 100 bbl (V₁) of 14.0 ppg (W₁) to 12.0 ppg (W₂):

$\text{Diesel, bbl}=\frac{100\times (14.0-12.0)}{12.0-7.0}$
Diesel = 40 bbl

⬆ Table of Content