Table 3. Rheological Parametersa of Base Slurry, Bentonite/E-2 wt %, and Bentonite/W-2 wt % at Different Aging Temperatures.
| aging temperature | AV (mPa·s) | PV (mPa·s) | YP (Pa) | RYP (Pa/mPa·s) | |
|---|---|---|---|---|---|
| before aging | base slurry | 6 | 5 | 1 | 0.2 |
| E-2 wt % | 46 | 33.5 | 12.5 | 0.373 | |
| W-2 wt % | 26 | 22 | 4 | 0.182 | |
| 150 °C | base slurry | 5.5 | 5 | 0.5 | 0.1 |
| E-2 wt % | 54.667 | 44 | 10.667 | 0.242 | |
| W-2 wt % | 18.5 | 16.5 | 2 | 0.121 | |
| 180 °C | base slurry | 5.5 | 4.5 | 1 | 0.22 |
| E-2 wt % | 29.75 | 23.25 | 6.5 | 0.279 | |
| W-2 wt % | 8.625 | 8 | 0.625 | 0.077 | |
| 200 °C | base slurry | 5 | 4 | 1 | 0.25 |
| E-2 wt % | 17 | 12.5 | 4.5 | 0.364 | |
| W-2 wt % | 6.25 | 5.5 | 0.75 | 0.136 |
a
Measured using a six-speed rotational viscometer.