Shear Studies on Polymer Flooding Systems with High Concentrations

Abstract:

Abstract: When the dose level of polymer is settled, the change of injection volume and concentration do not increase oil recovery obviously, while the result of lab research shows that the increasing of oil recovery of high concentration and high molecular weight polymer flooding can reach or over that of ASP flooding. The aim of this paper is to study the shear characteristic in high concentration and high molecular weight polymer flooding, and analyzed the suitable parameter of it.They can provide the theory of high concentration Polymer flooding. In the process of polymer flooding, it was because increasing the water phase viscosit and the retention effect of polymer molecules in porous media that making oil flow degrees than improved ,the sweep volume expand, and improve the oil recovery. Study confirmed [1-3], polymer solution with sticky elastic can effectively improve the oil displacement efficiency, reduce residual oil saturation [4-5]. So, the study on the shear properties of the polymer system in high concentration (>1000mg/L) can provide experimental base for a high concentration of polymer flooding, it also has important significance on theory of polymer flooding development and application research.

• Periodical: Advanced Materials Research (Volumes 535-537)
• Pages: 1189-1192
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.535-537.1189
• Online since: June 2012
• Authors: Ji Gang Wang, Peng Wu, Quan Qing Du, Hui Hui Cao, Meng Sun
• Keywords: Oil Recovery, Polymer Flooding, Shear Characteristic

References

[1] Demin Wang, Jiecheng Cheng, Qingyan Yang, et al. Viscous-elastic polymer can increase microscale displacement efficiency in cores[J]. SPE 63227, SPE Annual Technical Conference and Exhibition held in Dallas, Texas, l-4 October 2000.

DOI: 10.2118/63227-ms

[2] Demin Wang, Huifen Xia, Zhongchun Liu, Qingyan Yang. Study of the mechanism Poly-mer solution with visco-elastic behavior increasing microscopic oil displacement efficiency and the forming of steady "oil thread" flow channels [J]. SPE 68723, 2001.

DOI: 10.2118/68723-ms

[3] Wenhua Yan, Wanli Kang, Hongbing Jin, Dianping Xu, Guoping Jiang. Optimization of the injection parameters of polymer flooding of Apricot Oil Field sub-layers [J].Journal of Daqing Petroleum Institute, 2007, (01).

[4] Tao Zhang, Zhibo Lin, WU Wen-xiang. EOR Study of Polymer Flooding in low Permeability core. Oilfield Chemistry, 2008, (02).

[5] Jiecheng Cheng, Demin Wang, Junzheng Wu, et al.Molecular Weight Optimization of the polymer used in Flooding. Acta Petrolei Sinica, 2000, 21(1):102-106.