Research on the Mobility of Polymer Flooding System for Xinjiang Conglomerate Reservoirs

Abstract:

The conglomerate reservoir is provided with strong heterogeneity and complex pore structure. To study the matching relationship between polymer flooding system and pore throat of the conglomerate reservoir and set up the flow matching relationship plate, this paper conducted natural core flow experiments at the true flow rate of the site formation based on constant pressure flooding method, considering the shear of the borehole and the formation. And several suitable polymers for different reservoirs permeability were given. The experimental results indicated that a positive correlation between the flow properties and the viscosity of the polymer solution, but a negative correlation between the mobility and the permeability of reservoir. Such as the natural core with the permeability = 30×10^-3μm² was suitable for the viscosity≤16.0 mPa^.s of the polymer solution in the formation, the natural core with the permeability = 60×10^-3μm² was suitable for the viscosity≤35.2mPa^.s of the polymer solution and the natural core with the permeability = 120×10^-3μm² was suitable for the viscosity≤102.4mPa^.s of the polymer solution. Using compatibility relationship, quickly and easily choose the right injection parameters of the polymer based on the reservoir permeability, providing a theoretical basis for program preparation and parameters adjustment of the polymer flooding.

• Periodical: Advanced Materials Research (Volumes 960-961)
• Pages: 240-244
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.960-961.240
• Online since: June 2014
• Authors: Yun Qiang Wu, Qing Xiang Lou, Xiao Bin Nie, Yi Qiang Li, Jia Nan Xiang, Jun Jie Miao
• Keywords: Compatibility, Conglomerate Reservoir, Injection Parameters, Mobility

References

[1] Feng Huijie, Nie Xiaobin, Xu Guoyong, et al. Microscopic Mechanisms of Oil Displacement by Polymer Solution for Conglomerate Reservoir[J]. Oilfield Chemistry, 2007, 24(3): 232-237.

[2] Song Ziqi, Sun Ying, Liu Gang, et al. Characteristics and remaining oil distribution of heterogeneous conglomerate reservoir in Karamay Oilfield[J]. Journal of Petrochemical Universities, 2012, 25(2): 42-47.

[3] Han Xiuzhen, Li Mingyuan, Linmeiqin. Properties evaluation of linked polymer microspheres dispersed system. PGRE, 2009, 16(5): 63-65.

[4] Lin Meiqin, Zuo Qingquan, Liu Gang, ea tl. Matching Relation Between HPAM and Pores of Nuclepore Film[J]. Journal of Petrochemical Universities, 2012, 25(2): 42-47.

[5] Zhao Fulin. Principle of EOR[M]. DongYing: China university of petroleum press, (2006).

[6] Gao Zhenhuan, Lu Xiangguo. Experimental Study of Relationship Between Polymer Molecular Weight and Sweep Effciency[J]. Petroleum Geology & Oilfield Development in Daqing, 1994, 13 (2): 54-57.