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Water-Flooding Fluid Diversion Copolymeric Microsphere Prepared by Inverse Suspension Polymerization
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Abstract
In order to enhance oil recovery in high-temperature and high-salinity oil reservoirs, the copolymeric microspheres containing acrylamide (AM), acrylonitrile (AN) and AMPS was synthesized by inverse suspension polymerization. The copolymeric microsphere was very uniform and the size could be changed according to the condition of polymerization. The lab-scale studies showed that the copolymeric microsphere exhibit good salt-tolerance and thermal-stability when immersed in 20×10
5
mg/L NaCl(or KCl) solution, 7500 mg/L CaCl
2
(or MgCl
2
) solution or 2000 mg/L FeCl
3
solution, respectively. The copolymeric microsphere showed satisfactory absorbency rates. The sand-pipes experiments confirmed that the average toughness index was 1.059. It could enhance the oil recovery by about 3% compared with the corresponding irregular copolymeric particle.
Title: Water-Flooding Fluid Diversion Copolymeric Microsphere Prepared by Inverse Suspension Polymerization
Description:
Abstract
In order to enhance oil recovery in high-temperature and high-salinity oil reservoirs, the copolymeric microspheres containing acrylamide (AM), acrylonitrile (AN) and AMPS was synthesized by inverse suspension polymerization.
The copolymeric microsphere was very uniform and the size could be changed according to the condition of polymerization.
The lab-scale studies showed that the copolymeric microsphere exhibit good salt-tolerance and thermal-stability when immersed in 20×10
5
mg/L NaCl(or KCl) solution, 7500 mg/L CaCl
2
(or MgCl
2
) solution or 2000 mg/L FeCl
3
solution, respectively.
The copolymeric microsphere showed satisfactory absorbency rates.
The sand-pipes experiments confirmed that the average toughness index was 1.
059.
It could enhance the oil recovery by about 3% compared with the corresponding irregular copolymeric particle.
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