The Performance of Polymer Solution Added with Viscosity Stabilizer and the Evaluation of Its Oil Displacement Efficiency in Daqing Oilfield
Aiming at the low viscosity of polymer solution, which is compounded with fresh water but diluted with produced water, and at the problems concerning oil displacement efficiency, an onsite test on polymer solution with viscosity stabilizer (PSVS) is carried out. As a result, it has great and guiding significance to the application and popularization of viscosity stabilizer by studying the performance of polymer solution with viscosity stabilizer and its influence on oil displacement efficiency. In this paper, aiming at two different kinds of polymer solutions among which one is compounded with fresh water but diluted with fresh produced water and the other with aerated produced water, two laboratory evaluative tests concerning viscosity stabilization, anti-shear stability, fluidity, and absorbability of polymer solution as well as its oil displacement efficiency are done. The results of onsite application of PSVS are traced and analyzed. The viscosity stabilization of the polymer solution adding with viscosity stabilizer becomes much better than that of the normal polymer solution. The resistance and the residual resistance factors, the static oil sand adsorption rate and the dynamic core adsorption rate of the solution are all increased markedly. The working viscosity and oil displacement efficiency are improved markedly as well. In comparison with the polymer solution diluted with fresh produced water, the polymer solution diluted with aerated produced water is much better in terms of viscosity stabilization. Comparing with the normal polymer solution with viscosity stabilizer before sheared, the polymer solution which is sheared before adding with viscosity stabilizer performs obviously better in terms of viscosity stability. In contrast to the adjacent block injected with normal polymer solution, the block under onsite flooding test with injection of PSVS features that the average injection pressure increases slightly but keeps steady, the recovery speed of the average monthly water cut of production wells slows down, the thickness of the absorptive layers increases, and the periodic recovery rate improves as well.
Key words: Polymer solution; Viscosity stabilizer; Daqing oilfield
 He, N. Z., Zheng, W. L., & Pan, J. B. et al. (2003). Study of a Novel Polymer Solution as Viscosity Stabilizer. Advances in Fine Petrochemicals, 4(7), 38-40.
 Han, Y. G. (2008). Discussion on the Issue of Viscosity of Polymer Solution Prepared by Oilfield Sewage. Petroleum Geology and Recovery Efficiency, 15(6), 68-70.
 Sun, L., Pu, W. F., & Yang, H. J. (2007). Study on Viscosity Stabilizer for Alkali/Polymer Flooding. Drilling & Production Technology, 30(2), 127-129.
 Zhang, J. G. (2005). Analysis of the Main Factors Affecting the Viscidity of the Solution of Polymer. Fault-Block Oil & gas Field, 12(1), 57-59.
 Jiang, W. D., Zhang, K., & Xu, X. X. et al. (2007). Viscosity Differences and Mechanism Analysis of the Wasted Water-Polymer Solution in Aerobic and Anaerobic Environments. Petroleum Geology and Recovery Efficiency, 14(6), 69-72.
 Fan, J., Wei, L., & Luo W. L. et al (2011). Influencing Factors of the Viscosity Decrease on Polymer Sewage Solution. Oilfield Chemistry, 28(3), 250-253.
 Su Y. C. et al (2003). Research on Produced Water Mixing Polymer Solution. Petroleum Geology & Oilfield Development in Daqing, 22(6), 44-47.
- There are currently no refbacks.
If you have already registered in Journal A and plan to submit article(s) to Journal B, please click the CATEGORIES, or JOURNALS A-Z on the right side of the "HOME".
We only use three mailboxes as follows to deal with issues about paper acceptance, payment and submission of electronic versions of our journals to databases:
email@example.com; firstname.lastname@example.org; email@example.com
Copyright © 2010 Canadian Research & Development Centre of Sciences and Cultures
Address: 730, 77e AV, Laval, Quebec, H7V 4A8, Canada
Telephone: 1-514-558 6138