An Assessment of the Profile Control Capability of an Active Polymer for Offshore Q Oilfield Applications

doi:10.11885/j.issn.1674-5086.2017.11.07.20

Abstract

Abstract: The profile control capability of an active polymer was studied to address the issues of high heterogeneity and overall high water content with offshore Q Oilfields. The viscosity-improvement capacity and interfacial activity of the active polymer were examined by a rheometer and an interfacial tensiometer, respectively. An indoor physical simulation experiment was then performed to examine the active polymer for its injection properties, oil displacement capability, and displacement efficiency using various methods of injection. The experimental results showed that, compared to common polymers, the active polymer showed better viscosity-improvement capacity, with low concentration but high-viscosity. At a concentration of above 400 mg/L, it resulted in an oil-water interfacial tension of below 11 mN/m. It was capable of in-depth profile control, as demonstrated by the evident pressure increase at the end of the rock core into which it was injected. Its oil displacement efficiency was 8.66% higher than that of common polymers of the same viscosity. In addition, it could improve the recovery rate by up to 22.34% when used along with water for alternative injection.

Key words: active polymer, viscosity-improvement capacity, interfacial activity, profile control, manner of injection

CLC Number:

TE65

WU Binbin, CHEN Bin, WANG Chengsheng, WU Xiaoyan, ZUO Qingquan. An Assessment of the Profile Control Capability of an Active Polymer for Offshore Q Oilfield Applications[J]. 西南石油大学学报(自然科学版), 2019, 41(3): 100-106.

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URL: http://journal15.magtechjournal.com/Jwk_xnzk/EN/10.11885/j.issn.1674-5086.2017.11.07.20

http://journal15.magtechjournal.com/Jwk_xnzk/EN/Y2019/V41/I3/100

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