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A saturated saltwater drilling fluid based on salt-responsive polyampholytes
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JIANG Guancheng,HE Yinbo,CUI Wuge,YANG Lili,YE Chenxi
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Table 4 Basic performance of SSDF prepared with AM-AMPS-DMDAAC polyampholyte.
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| Condition | Apparent
viscosity/(mPa·s) | Plastic viscosity/
(mPa·s) | Yield point/Pa | Dynamic plastic ratio/
(Pa·(mPa·s)-1) | Φ6/Φ3 | API fluid loss/mL | Fluid loss under high temperature and pressure/mL | Before hot-aging
After hot-aging | 64.0
38.5 | 58
36 | 6.13
2.56 | 0.106
0.071 | 5/4
4/3 | 5.1 | | | 68.8 |
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