| abstract |
The present invention relates to the field of oil-field chemical reagents, and discloses a polymer, a preparation method of the polymer, and a viscosified acid fluid. The polymer contains structural units represented by formula (1), structural units represented by formula (2), and structural units represented by formula (3), wherein, R 1 -R 6 and R 11 -R 13 are H or C1-C4 linear or branched alkyl respectively and independently, R 7 is C1-C4 linear or branched alkylene, R 8 -R 10 are C1-C5 linear or branched alkyl respectively and independently, R 14 is C1-C4 linear or branched alkyl, and n=0-4. |