Stabilization mechanism of viscoelastic polymer microspheres on N2 foam system
Yang H. Shen J. Liu D. Jiang J. Lv Z. Xu Z. Kang W. Su W. Turtabayev S.
15 December 2023Elsevier B.V.
Journal of Molecular Liquids
2023#392
Foam assisted flooding for crude oil displacement has been used as a commercially viable method for gas-enhanced oil recovery (EOR) processes, due to its outstanding ability in flow rate controlling. Micron-sized particles were continuously applied as the stabilizer for foam fluids, which can adsorb at the water–gas interface to increase interfacial elasticity, as such to prevent foam film rupture during bubble collisions. Current work synthesized two viscoelastic polymer microspheres by inversing emulsion polymerization, and evaluated their effectiveness as the foam fluids additives from the aspects of particle sizer and interfacial viscoelasticity. Furthermore, the ability of polymer microspheres to stabilize foam fluids was qualitatively analyzed according to the dynamics light scattering method and microscopic inspection. When containing 0.8 % SDS + 0.4 % polymer microspheres, the N2 foam system represented the most stable status for both viscoelastic polymer microspheres. The adsorption of microspheres at foam interface significantly increased the foam film strength that prevented lamella rupture when bubbles collision during the flooding process. Moreover, the sustained release property of viscoelastic polymer microspheres helped the fluid to be gradually released from the lamella, which further decreased the thinning speed of the liquid film between bubbles and to increase the foam stability.
Foam stability mechanism , N2 foam , Viscoelastic polymer microspheres , Viscoelasticity
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Key Laboratory of Unconventional Oil & Gas Development, China University of Petroleum (East China), Ministry of Education, Qingdao, 266580, China
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China
School of Chemical and Process Engineering, University of Leeds, Leeds, LS2 9JT, United Kingdom
Powerchina Huadong Engineering Corporation Limited, Hangzhou, 311122, China
Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkestan, 161200, Kazakhstan
Kazakh-British Technical University, Almaty, 050000, Kazakhstan
Key Laboratory of Unconventional Oil & Gas Development
School of Petroleum Engineering
School of Chemical and Process Engineering
Powerchina Huadong Engineering Corporation Limited
Khoja Akhmet Yassawi International Kazakh-Turkish University
Kazakh-British Technical University
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