Petroleum Reservoir Evaluation and Development >

2020 , Vol. 10 >Issue 3: 33 - 38

DOI: https://doi.org/10.13809/j.cnki.cn32-1825/te.2020.03.005

Methodological and Theory

Study on impact of particle size of CO2 foam system for flooding on its performance

  • Shuangxing LIU ,
  • Bo PENG ,
  • Qi LIU ,
  • Xingchun LI ,
  • Ming XUE
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  • 1. China University of Petroleum（Beijing）, Beijing 102249, China;
    2. CNPC Research Institute of Safety and Environment, Beijing 102206, China

Received date: 2020-02-07

  Online published: 2020-07-03

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Abstract

CO2 is widely used as a displacement agent in oil displacement because of its unique physical properties and its chemical reaction with crude oil. But pure CO2 gas flooding is prone to gas channeling. So the application of CO2 in the foam flooding process make CO2 can not only play its own role in oil displacement, but also realize fluidity control and reduce the possibility of gas channeling. In this study, the stability, particle size change and percolation characteristics of CO2 foam with different particle sizes and the same chemical composition are experimentally studied, the change rule of the influence of particle size on foam performance is obtained, and the influence mode is analyzed and discussed. The results show that the smaller the bubble size, the better the stability of the foam system, the stronger the blocking ability, and the slower the particle size changes over time. Changing the preparation method to reduce the particle size of the foam system can effectively improve the foam’s stability and EOR capacity.

Key words： CO2 foam; oil displacement; particle size; stability; percolation

Cite this article

Shuangxing LIU , Bo PENG , Qi LIU , Xingchun LI , Ming XUE . Study on impact of particle size of CO2 foam system for flooding on its performance[J]. Petroleum Reservoir Evaluation and Development, 2020 , 10(3) : 33 -38 . DOI: 10.13809/j.cnki.cn32-1825/te.2020.03.005

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