The impact of extensional viscosity on oil displacement efficiency in polymer flooding

Autor:	Huaijiang Zhu, Yongzhong Fan, Oldoerp Klaus, Jianhui Luo
Rok vydání:	2012
Předmět:	Viscosity Colloid and Surface Chemistry Materials science Rheometer Relative viscosity Polymer chemistry Trouton's ratio Viscometer Extensional viscosity Composite material Reduced viscosity Viscoelasticity
Zdroj:	Colloids and Surfaces A: Physicochemical and Engineering Aspects. 414:498-503
ISSN:	0927-7757
DOI:	10.1016/j.colsurfa.2012.08.005
Popis:	The flow behavior of polymer flooding solution can not only be described simply with shear flow field, but also with convergent and extensional flow field. The extensional viscosity of polymer solutions used in polymer flooding in Daqing Oilfield was investigated with CaBER1 extensional rheometer, and the results showed that the extensional viscosity of which is much higher than shear viscosity with three orders of magnitude. The extensional viscosity of the polymer solutions sharply increased when polymer molecules were stretched to the limit, which means that an extension stiffen phenomenon occurred. The extremely high extensional viscosity and an extension stiffen characteristic in stretching process of polymer solutions could increase capillary number substantially to raise microscopic oil displacement efficiency.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::15d159e729bf263f71b92313e8ff7e8e https://doi.org/10.1016/j.colsurfa.2012.08.005 Zobrazit plný text záznamu Full Text from ScienceDirect