JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2012, Vol. 42 ›› Issue (3): 115-119.

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Effects of hectorite particles on emulsification stability of  polymer flooding produced water

WANG Yan1, LI Yu-jiang1*, SUN De-jun2, WU Tao2   

  1. 1. School of Environmental Science and Engineering, Shandong University, Jinan 250100, China;
    2. The Key Laboratory of Colloid Interface Chemistry of Ministry of Education, Shandong University, Jinan 250100, China
  • Received:2011-11-18 Online:2012-06-20 Published:2011-11-18

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Abstract:

The effects of hectorite particles on oilwater separation and oilwater interfacial properties of polymer flooding produced water were investigated. The stability of the polymer flooding was characterized by oil content analysis. When the HPAM(hydrolyzed polyacrylamide) concentration was 100-600 mg/L and the hectorite particles concentration was 50-100mg／L, and the hectorite particles had the greatest impact on the stability of the polymer flooding produced water under the experimental conditions. The influences of hectorite particles on Zeta potential, interfacial tension, oilmineral aggregates of polymer flooding produced water and viscosity were studied. The results showed that the addition of hectorite particles could cause the Zeta potential of oil droplets to rapidly decrease, the interfacial tension declined and viscosity was enhanced in polymer flooding produced water. The effect of hectorite particles on emulsification stability of polymer flooding produced water was noticeable. When the hectorite particles concentration was higher than 100mg／L, the oil droplets tended to coagulate, which was of benefit to the polymer flooding produced water treatment.

Key words: polymer flooding produced water, oil content, interfacial properties, interfacial tension, Zeta potential, viscosity

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