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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 7 Field application statistics.
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Well
No. | Horizontal length/m | Number of perforation clusters per stage | Fracturing stage | Flow rate/
(m3·min-1) | Volume of slick water/
m3 | Average sand quality per stage/t | Produc-
tion rate/
(104 m3·d-1) | Salinity of produced water/(mg·L-1) | Reuse rate of produced water/% | Average friction reduction ratio/% | | N108-1 | 1 370 | 3 | 12 | 10-12 | 23 383 | 86.0 | 40.1 | ≈20 000 | 100 | 76.2 | | N108-2 | 1 100 | 3 | 13 | 10-12 | 15 910 | 85.3 | 75.7 | | N108-3 | 1 190 | 3 | 8 | 10-12 | 16 245 | 91.2 | 75.4 | | N108-4 | 1 330 | 3 | 10 | 10-12 | 19 632 | 93.4 | 76.1 | | N204-1 | 1 600 | 3 | 24 | 12-14 | 32 491 | 94.7 | 43.6 | ≈30 000 | 100 | 75.4 | | N204-5 | 1 700 | 3 | 25 | 12-14 | 38 156 | 89.1 | 75.6 | | N202-5 | 1 730 | 3 | 31 | 12-14 | 54 320 | 90.3 | 39.6 | 75.1 | | N202-6 | 1 750 | 3 | 31 | 12-14 | 54 588 | 95.6 | 75.3 |
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