دانلود رایگان مقاله انگلیسی ویژگی های محلول و جابه جایی یک نسخه جدید از کوپلیمرهای آکریل آمید برای بهبود عملکرد روغن - اشپرینگر 2017

Abstract

The radical polymerization of acrylamide, acryloylmorpholine, acrylate or 2-acrylamide-2-methyl propane-sulfonate in water initiated with ammonium persulfate or 2,20 -azobis(2-methylpropionamide)dihydrochloride was carried out to produce copolymer for enhanced oil recovery (EOR). The structure of the acrylamide copolymer was determined by infrared (IR) and 1 H-NMR. Influence of synthesis condition on viscosities of products was studied. As a kind of potential displacement agent the salt tolerance temperature resistance and displacement performance of copolymer were also investigated in this paper. The introduction of ACMO and AMPS improves the thermostability of copolymer. The ability of the AM/AANa/ACMO/AMPS copolymer to reduce permeability is higher than HPAM. The tertiary recovery of the former is also higher than that of the latter whether in homogeneous or heterogeneous condition.

Conclusions

AM/AANa/ACMO copolymer and AM/AANa/ACMO/AMPS copolymer were prepared by free radical polymerization. The structure of copolymer was characterized by IR and 1 H-NMR. The apparent viscosity of AM/AANa/ACMO copolymer and AM/AANa/ACMO/AMPS copolymer first increases and then decreases with increasing ACMO proportion. The viscosity of AM/AANa/ACMO copolymer initiated by APS is higher than that of AIBA when the initiator concentration is blew 0.3 wt%. With the increase of electrolytes concentration, the viscosity of copolymer solution reduces gradually. After aging 8 days at 80 C, the viscosity of AM/AANa/ACMO/AMPS copolymer is highest, second AM/AANa/ ACMO copolymer, and the viscosity of HPAM is lowest. The FR and FRR values of AM/AANa/ACMO/AMPS copolymer are higher than that of HPAM under under different permeabilities (0.5–2.5 lm2 ). The tertiary recovery of the AM/AANa/ ACMO/AMPS copolymer (15.43 and 10.81%) is higher than that of HPAM (7.41 and 5.37%) whether in homogeneous or heterogeneous condition.