Title: Studies on CO₂ foam stability and the influence of polymer on CO₂ foam properties

Authors: Mingming Lv; Shuzhong Wang

Addresses: Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China ' Key Laboratory of Thermo-Fluid Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Abstract: The stability of CO₂ foam stabilised by sodium dodecyl benzene sulfonate (SDBS) has been studied compared with N₂ foam and the influences of polymer additives on foamability and stability of CO₂ foam have been investigated with partially hydrolysed polyacrylamide (HPAM) by different foaming methods. The crude oil and tetradecane were used for the oil tolerance tests. Static foam measurements showed that the stability of CO₂ foam was much lower than that of N₂ foam both in the presence and absence of oil. The addition of HPAM reduced the foamability dramatically, because of the increased viscosity of the foaming solution. The stability of CO₂ foam was improved with 0.01 wt.% HPAM additive and the CO₂ foam performed worse even less stable than the parallel samples without HPAM when the amount of HPAM increased to 0.05 wt.%. The addition of HPAM improved the stability of the CO₂ foam/oil system in some degree. [Received: May 10, 2014; Accepted: November 4, 2014]

Keywords: carbon dioxide; CO2; sodium dodecyl benzene sulfonate; SDBS; polymers; foam stability; oil tolerance; foam properties; polymer additives; foamability; partially hydrolysed polyacrylamide; HPAM; crude oil; tetradecane; oil tolerance; viscosity.

DOI: 10.1504/IJOGCT.2015.072077

International Journal of Oil, Gas and Coal Technology, 2015 Vol.10 No.4, pp.343 - 358

Received: 13 May 2014
Accepted: 04 Nov 2014
Published online: 30 Sep 2015 *

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