Improving oil recovery in the CO<sub>2</sub> flooding process by utilizing nonpolar chemical modifiers

Yong Yang; Xiangliang Li; Ping Guo; Yayun Zhuo; Yong Sha

doi:10.1016/j.cjche.2015.12.002

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Improving oil recovery in the CO₂ flooding process by utilizing nonpolar chemical modifiers

第25届中国过程控制会议专栏 | Updated：2026-01-06

- Improving oil recovery in the CO₂ flooding process by utilizing nonpolar chemical modifiers
- Chinese Journal of Chemical Engineering Vol. 24, Issue 5, Pages: 646-650(2016)
- Affiliations：
  
  2 College of Chemistry and Chemical Engineering, Xiamen University,Xiamen,China,361000
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2015.12.002
  CLC：
- Published：2016
- Accepted：
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flooding process by utilizing nonpolar chemical modifiers[J]. Chinese Journal of Chemical Engineering, 2016, 24(5): 646-650.
DOI：

flooding process by utilizing nonpolar chemical modifiers[J]. Chinese Journal of Chemical Engineering, 2016, 24(5): 646-650. DOI： 10.1016/j.cjche.2015.12.002.

摘要

Abstract

By means of experiments of CO

miscibility with crude oil

four nonpolar chemicals were evaluated in order to enhance the miscibility of CO

with crude oil. Through pre-slug injection and joint injection of toluene in CO

crude oil displacement experiments in the slim-tube were conducted to investigate effects of the tolueneenhanced CO

flooding under simulated subterranean reservoir conditions. Experimental results showed that toluene can enhance extraction of oil into CO

and dissolution of CO

into oil with the increment of 251% and 64% respectively. Addition of toluene can obviously improve the oil recovery in either pre-slug injection or joint injection

and the crude oil recovery increasedwith the increase of the toluene concentration. The oil recovery can increase by 22.5% in pre-slug injectionwith the high toluene concentration. Pre-slug injectionwas recommended because it can consume less toluene than joint injection. This work could be useful to development and application of the CO

flooding in the oil recovery as well as CO

emission reduction.

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Improving oil recovery in the CO2 flooding process by utilizing nonpolar chemical modifiers

DOI：10.1016/j.cjche.2015.12.002

摘要

Abstract

关键词

Keywords

references

Improving oil recovery in the CO₂ flooding process by utilizing nonpolar chemical modifiers