Regulation rule of cellulose nanocrystals on thixotropy of hydrogel for water shutoff in horizontal wells

doi:10.1016/j.colsurfa.2022.128735

GIEC OpenIR

	Regulation rule of cellulose nanocrystals on thixotropy of hydrogel for water shutoff in horizontal wells
	Huang, Feiyang 1,2,3; Lv, Junsong 1,3; Li, Hang 1,3; Xu, Shiyu 1,3
	2022-06-20
发表期刊	COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
ISSN	0927-7757
卷号	643 页码:9
通讯作者	Xu, Shiyu(qq1731112378@126.com)
摘要	Water production limits the efficient development of horizontal wells. But the ordinary hydrogel cannot completely fill the annulus between the wellbore and slotted liners due to poor thixotropy, which determines that the water cannot be successfully plugged. In this paper, cellulose nanocrystals (CNC) were applied to develop a hydrogel with high thixotropy for water shutoff in horizontal wells. Besides, the effect of CNC concentration, inorganic salts concentration, and temperature on thixotropy was observed, respectively. The results indicate that the thixotropic feature is enhanced by increasing the concentration of CNC. The CNC is an effective thixotropic regulator. The hydrogel has the highest thixotropy when the CNC concentration is 10%. The inorganic salts concentration will reduce the thixotropic performance of the hydrogel. This is maybe because NaCl and CaCl2 as strong electrolytes could be fully hydrolyzed into Na+ and Ca2+, which will reduce the water activity of the hydrogel. The introduction of NaCl and CaCl2 will reduce the thixotropic performance due to Na+ and Ca2+ are associated with the group bridge in the hydrogel components, which makes the molecular gel chains entangled with each other. What's more, the Ca2+ in CaCl2 plays a more critical role in increasing the degree of freedom of water molecules in the hydrogel compared to NaCl. The improvement of CNC concentration is advantageous to reduce the influence of inorganic salts concentration. The effect of temperature on thixotropy was observed at 50 degrees C, 60 degrees C, 70 degrees C, and 80 degrees C, respectively. The results show that the high temperature has a negative influence on thixotropy of CNC hydrogel. This is because the CNC hydrogel is a three-dimensional grid structure formed by intermolecular hydrogen bond interactions of CNC molecules. But the hydrogen bond between CNC molecules is easy to break when the temperature rises. The increase of CNC concentration can reduce the impact of temperature. The study could enrich the regulation theory between nanoparticles and polymers. It also provides technical guidance for further increasing the thixotropy of enhanced oil recovery (EOR) polymers, such as drilling fluid and fracturing fluid commonly used in petroleum industry.
关键词	Thixotropy Horizontal well Water shutoff Hydrogel Temperature Inorganic salts
DOI	10.1016/j.colsurfa.2022.128735
关键词[WOS]	HIGH-TEMPERATURE ; OIL
收录类别	SCI
语种	英语
资助项目	Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences[E129kf1801] ; National Natural Science Foundation of China[52074038] ; 14th Students' Innovation and Entrepreneurship Training Program of Yangtze University[Yz2021241]
WOS研究方向	Chemistry
项目资助者	Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences ; National Natural Science Foundation of China ; 14th Students' Innovation and Entrepreneurship Training Program of Yangtze University
WOS类目	Chemistry, Physical
WOS记录号	WOS:000794248000002
出版者	ELSEVIER
引用统计	被引频次：5[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/36504
专题	中国科学院广州能源研究所
通讯作者	Xu, Shiyu
作者单位	1.Yangtze Univ, Sch Petr Engn, Wuhan 430100, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 3.Key Lab Drilling & Prod Engn Oil & Gas, Wuhan 430100, Hubei, Peoples R China
第一作者单位	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	Huang, Feiyang,Lv, Junsong,Li, Hang,et al. Regulation rule of cellulose nanocrystals on thixotropy of hydrogel for water shutoff in horizontal wells[J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,2022,643:9.
APA	Huang, Feiyang,Lv, Junsong,Li, Hang,&Xu, Shiyu.(2022).Regulation rule of cellulose nanocrystals on thixotropy of hydrogel for water shutoff in horizontal wells.COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS,643,9.
MLA	Huang, Feiyang,et al."Regulation rule of cellulose nanocrystals on thixotropy of hydrogel for water shutoff in horizontal wells".COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 643(2022):9.