RESEARCH ARTICLE


Laboratory Evaluation and Field Application of a Type of Surface-Active Polymer Oil Displacement Agent



Xiangbo Wei*, Xiaorui Li, Lei Wang, Guoyan Ma, Jinhao Gao
Key Laboratory of Auxiliary Chemistry Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science Technology, Xi'an City, Shaanxi, 710021, PR. China


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© Wei et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Correspondence: *Address correspondence to this author at the Key laboratory of Auxiliary Chemistry Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science Technology, Xi'an City, Shaanxi, 710021, PR. China; Tel: 18729518299; Fax: 029-83113168;E-mail: 87052007@163.com


Abstract

Aiming to obtain a type of oil displacement with both surface activity and polymer performances, this paper, basing on mixing initiators at low temperatures, proposed a type of anion-nonionic surface-active polymer oil displacement agent (ANSP-1) by introducing polymerizable anion-nonionic surfmer (ANS-1), acrylamide (AM) and acrylic acid (AA). Structure of ANSP-1 was measured by FTIR. Laboratory studies show that: ANS-1 graft copolymerization occurs with AM, it avoids chromatographic separation, and it has better performances on molecular properties, such as tackifying performance, salt resistance, shear resistance and thermal stability. Oil-water interfacial tension can reach 1×10 mN/m. Field application shows that average recovery ratio of the test wells which used ANSP-1 is 11%, which is 6.2% higher than the whole area.

Keywords: Low interfacial tension, Oil displacement agent, Polymer flooding, Recovery ratio.