Oil Field Cementing Applications
Selvol™ Polyvinyl Alcohol is perfectly suited for use as an oilfield fluid loss control additive in cementing applications. When mixed with Class H cement powder, water, a dispersant and defoamer, this non-ionic, low viscosity producing additive will prevent fluid from being lost to the formation in intermediate cementing operations. At bottom-hole circulating temperatures of up to 190°F, it is the most commonly used fluid loss control additive in the world. An added benefit of utilizing Selvol™ Polyvinyl Alcohol in oilfield cementing applications is that it will not retard the set-time at bottom-hole circulating temperatures.
Recipe for Success
Normal range for use in wells: 80°F to 190°F
Concentration: 0.5-2.0% BWOC
| Slurry 1 | Slurry 2 | ||
|---|---|---|---|
| Composition | De-ionized water | 39% bwoc | 39% bwoc |
| Selvol™ Premiol LTC 90 | 0.75% bwoc | 1% bwoc | |
| Daxad 19 | 0.25% bwoc | 0.5% bwoc | |
| FP-6L | remainder | remainder | |
| Class H Cement | 0.75% bwoc | 1% bwoc | |
| Test Temperature | 110°F | 110°F | |
| FANN Rheology | 300 rpm | 140 | 136 |
| 100 rpm | 55 | 53 | |
| 6 rpm | 4 | 4 | |
| 3 rpm | 3 | 3 | |
| PV, cPs | 128 | 125 | |
| YP, lb/100 sq. ft. | 13 | 12 | |
| Filtration, 100 psi | Average API fluid loss ml/30 min | 40 | 31 |
