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Citation: YI Zhuo, YANG Fulin, LIU Xi, ZHAO Fangyuan, FANG Zhao, DU Chao, HU Xiaon. Preparation and Properties of Flooding Copolymer P(AM/AMPSNa/AANa) for High-temperature and High-salinity Oil Reservoir with Mid-Low Permeability[J]. Chinese Journal of Applied Chemistry, ;2015, 32(5): 519-526. doi: 10.11944/j.issn.1000-0518.2015.05.140451 shu

Preparation and Properties of Flooding Copolymer P(AM/AMPSNa/AANa) for High-temperature and High-salinity Oil Reservoir with Mid-Low Permeability

YI Zhuo ^a,, ,
YANG Fulin ^b ,
LIU Xi ^a ,
ZHAO Fangyuan ^a ,
FANG Zhao ^a ,
DU Chao ^a ,
HU Xiaon ^a

1.
a Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation, Beijing 100013, China;
2.
b Research Institute of Petroleum Engineering Technology, Jiangsu Oilfield Branch, SINOPEC, Yangzhou, Jiangsu 225009, China

Corresponding author: YI Zhuo,
Received Date: 29 December 2014
Available Online: 24 March 2015
Fund Project: 中国石油化工股份有限公司基金资助项目(212041) (212041)

Due to the constraints of the factors such as poor injectivity,mechanical shearing degradability,temperature-tolerated and salt-resisted ability,hydrolyzed polyacrylamide(HPAM) with high relative molecular mass has no obvious oil recovery in polymer flooding in mid-low permeability oil reservoirs.The temperature-tolerated and salt-resisted copolymer P(AM/AMPSNa/AANa) with micro-branched structure was synthesized by solution polymerization of acrylamide(AM),2-acrylamide-2-methylpropanesulfonic acid(AMPS) with ammonium persulfate(APS)/N,N-dimethylaminoethyl methacrylate(DMAEMA) as initiating system.Influences of the reaction temperature,chain transfer agent,initiator content on the intrinsic viscosity of copolymer were investigated.The structure of copolymer was characterized by IR and ¹³C NMR spectra.The properties of copolymer with intrinsic viscosity 1915 mL/g were evaluated.The results indicate that the copolymer has superior shear-resistence,temperature-tolerance,salt-resisting,aging property,injection and displacement efficiency,which can be used as targeted flooding polymer in high-temperature and high-salinity oil reservoir with mid-low permeability.
- mid-low permeability,
- polymer flooding,
- micro-branched structure,
- temperature-tolerated and salt-resisted,
- shear resistance,
- polyacrylamide
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