西南石油大学学报(自然科学版)

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Synthesis and Properties of an Acrylamide Copolymer Based on Phosphate

Gou Shaohua1,2*, Yang Cheng2, Ye Zhongbin1,2, Chang Jing3, Ma Yongtao2   

  1. 1. State Key Laboratory of Oil & Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    2. School of Chemistry and Chemical Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China
    3. Halliburton Energy Services(China)Co. Ltd.,Chengdu,Sichuan 610500,China
  • Online:2015-02-01 Published:2015-02-01

Abstract:

An acrylamide copolymer was synthesized using acrylamide(AM),acrylic acid(AA),(1-dimethylamino-allyl)-
phosphoric acid(DMAAPA)and N-allyl octyl imide(NAOI)as raw materials and NaHSO3-(NH4)2S2O8 as initiator. The
optimum synthetic conditions were determined as follows:the appropriate temperature was 45 ?C,the initiator was found to be
0.3%,the pH was 7,and m(AM):m(AA):m(DMAAPA):m(DMAAPA)=6.0:4.0:0.015:0.030. The molecular structure
of the copolymer was confirmed by IR and 1H NMR,proving that the functional monomers were present in the molecule chain.
The retention rate of the copolymer could reach 28.9%(120 ?C),18.7%(1 000 s−1),and 22.2%(1.2 g/L NaCl)respectively
according to the performance evaluation. Up to 10.54% enhanced oil recovery(EOR)could be obtained by core flood testing
using 2 000 mg/L copolymer at 65 ?C.

Key words: phosphate, acrylamide copolymer, temperature-tolerance, salt-tolerance, shear-resistance, EOR chemical