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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 8 Tolerance of SSDF based on HvL and LvH to CaCl2 (after hot-aging).
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| Contamination quantity/% | Apparent viscosity/(mPa·s) | Plastic viscosity/(mPa·s) | Yield point/Pa | Dynamic plastic ratio/(Pa·(mPa·s)-1) | Φ6/Φ3 | Fluid loss under high temperature and pressure/mL | 0
0.50
0.75
1.00 | 79.0
74.0
65.5
38.0 | 66
65
58
32 | 13.29
9.20
7.66
6.13 | 0.201
0.142
0.132
0.192 | 5/4
5/4
4/3
3/2 | 8.0
12.3
18.9
76.7 |
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