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A high salt tolerance and low adsorption drag reducer based on non-covalent enhancement
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MA Yingxian,ZHU Zhi,GUO Jianchun,ZHOU Han,LI Jia,XIONG Yujia,MA Leyao
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Table 3 Test results of slick waters with 0.10% DN drag reducer prepared by produced waters from different blocks.
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| Source of water | Salinity/ (mg·L-1) | Apparent viscosity/(mPa·s) | Friction reduction ratio/% | | Freshwater | 0 | 2.46 | 76.35 | | Produced water of Weiyuan gas field | 32 132 | 1.92 | 72.05 | | Produced water of Changning gas field | 28 512 | 1.84 | 71.31 | | Produced water of Zhaotong gas field | 21 669 | 1.87 | 71.18 |
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