Synthesis and solution properties of comb-like acrylamide copolymers

Abstract

A comb-like acrylamide copolymer (HCJ-1) was synthesized by using aqueous free radical polymerization of acrylamide (AM) as main monomer and ether carboxylate as functional monomer. The copolymers were characterized with FT-IR and SEM. The SEM results show that the molecular structure of copolymer is extended in salt water. It is proved that the copolymer shows good salt resistance.The solution properties of HCJ-1 were studied and compared with those of partially hydrolyzed polyacrylamide (HPAM). The experimental results show that the obtained HCJ-1, compared with HPAM, exhibits a dramatic enhancement in the salt-resistant properties. The apparent viscosity retention rate of 1.5 g L HCJ-1 aqueous solution and salt solution after 180 days at 60 °C are 70.6% and 64.5%, respectively, exhibiting good thermal stability. In addition, HCJ-1 solution also displays the excellent shearing resistance. In a word, the experimental results show the HCJ-1 is a promising profiling agent for high salinity reservoir.

Keywords

comb-like / salt resistance / thermal stability / shearing resistance

References

[1] Lu X.G., Liu J.X., Wang R.J., . Study of Action Mechanisms and Properties of Cr³⁺ Cross-linked Polymer Solution with High Salinity[J]. Petro. Sci., 2012, 9(1): 75-81.

[2] Chung T., Bae W., Nguyen N.T.B., . A Review of Polymer Conformance Treatment: A Successful Guideline for Water Control in Mature Fields[J]. Energy Source Part A., 2012, 34(1–4): 122-133.

[3] Lu X.G., Zhao L.L., Zhang K. The Effect and Analysis on Cr³⁺ Gel Improving Proile Control in Alkalescent Alkaline/Surfactant/Polymer Flooding[J]. J. Appl. Polym. Sci., 2009, 122(5): 2 773-2 780.

[4] Taylor K.C., Nasr-El-Din H.A. Water-soluble Hydrophobically Associating polymers for Improved Oil Recovery: A Literature Review[J]. J. Petrol. Sci. Eng., 1998, 19(3–4): 265-280.

[5] Zhang J., Wang S.X., Lu X.G., . Performance Evaluation of Oil Displacing Agents for Primary-minor Layers of the Daqing Oilfield[J]. Petro. Sci., 2011, 8(1): 79-86.

[6] Wang Y., Luo J., Bu R., . Analysis on Polymers of Temperature and Saltresistant for Enhanced Oil Recovery[J]. Chem. Indus. Eng. Prog., 2003, 22(3): 271-274.

[7] Zhao Y.Z., Zhou J.Z., Xu X.H., . Synthesis and Characterization of a Series of Modified Polyacrylamide[J]. Colloid. Polym. Sci., 2009, 287(2): 237-241.

[8] Luo J., Bu R., Zhu H., Wang P., . Property and Application of Combshape Polyacrylamide[J]. Acta. Pet. Sin., 2004, 25(2): 65-68.

[9] Yuan S, Luo J, Pu R, Liu Y, et al. Braided Combshaped Salt-resistant Polymer Thickening Agent[P]. US Patent, 007304116B2, 2007

[10] Zhou C.J., Yang W.M., Yu Z.N. Synthesis and Solution Properties of Novel Comb-shaped Acrylamide Copolymers[J]. Polym. Bull., 2011, 66: 407-417.