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Stimulus-responsive mechanism of salt-responsive polymer and its application in saturated saltwater drilling fluid
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HE Yinbo,JIANG Guancheng,DONG Tengfei,YANG Lili,LI Xiaoqing
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Table 1 Turbidity variations of polymer solutions with NaCl concentration.
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| Polymer | Turbidity of solution/NTU | CNaCl=
0 | CNaCl=
1.5 mol/L | CNaCl=
3.0 mol/L | CNaCl=
4.5 mol/L | | AM90-AMPS10 | 0.2 | 0.8 | 1.3 | 1.9 | | AM90-AMPS5-TAC5 | 152.0 | 6.8 | 1.1 | 0.6 | | AM90-AMPS6-TAC4 | 107.7 | 5.5 | 1.1 | 1.8 | | AM90-AMPS7-TAC3 | 44.4 | 5.1 | 7.7 | 8.2 | | AM90-AMPS8-TAC2 | 9.8 | 2.1 | 3.8 | 5.2 | | AM90-AMPS9-TAC1 | 1.7 | 1.7 | 3.9 | 4.1 |
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