Effect of Nonionic Surfactant on Emulsifiability and Interfacial Activity of NaOH/HABS/HPAM Flooding System

Abstract:

Studying the relationship of oil-water IFT and the stability of oil emulsion will further explain oil displacement mechanism in crude oil flooding. In this article, for nonylphenol polyoxyethylene ether can resist multivalence cations, the performance of associative surfactant containing HABS and nonylphenol polyoxyethylene ether (NP), the influence of the improvement of emulsion stability on the interfacial tension were studied by evaluating the interfacial tension and emulsion stability. Results show that nonionic surfactant NP-x (x=4, 6, 10) can improve the tolerance of HABS to NaOH with low concentration, and NP-6 appears the best synergistic effect, when C_NaOH is not more than 1.2wt%, the IFT_eq is lower than 9.9×10^-3mN/m, within the concentration range of the investigation. At the same time, NP-x can improve oil emulsion stability, when C_NaOH is 0.6wt%, C_HPAM is 0.18wt%, total concentration of the surfactant (ω_HABS:ω_NP=8:2) are 0.05wt% and 0.1wt%, decreasing the balance interfacial tension between oil and water can be regarded as the guarantee of the emulsion stability.

• Periodical: Advanced Materials Research (Volumes 726-731)
• Pages: 320-324
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.726-731.320
• Online since: August 2013
• Authors: Shi Ji Li, Rui Xia Niu, Hua Lin Song, Hua Song, Shuang Bo Sun
• Keywords: Emulsifiability, Interfacial Activity, NaOH/HABS/HPAM Flooding System, Nonionic Surfactant

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