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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 6 Tolerance of SSDF based on HvL and LvH to bentonite contamination (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
5
15
25
30 | 79
83
88
117
131 | 66
71
75
96
94 | 13.29
12.26
13.29
21.46
37.81 | 0.201
0.172
0.177
0.224
0.402 | 5/4
5/4
6/5
9/7
21/18 | 8.0
10.0
11.8
15.4
23.0 |
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