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以丙烯酸(AA)、丙烯酰胺(AM)、3-烯丙氧基-2-羟基-丙烷磺酸钠(AHSPE)和N,N-二烯丙基油酸酰胺(DNDA)为原料,制备了一种水溶性四元共聚物AA/AM/AHPSE/DNDA。确定了最佳合成条件:温度35℃、pH=7、m(AA)∶m(AM)∶m(AHPSE)∶m(DNDA)=69.7∶25∶5∶0.3%和引发剂加量0.3%(wt,质量分数,下同)。对共聚物进行了FT-IR和1 H-NMR表征。2g/L该共聚物溶液在Na+、Ca2+、Mg2+浓度为20、2和2g/L时,表观黏度分别为35.1、33.8和34.5mPa·s,黏度保留率分别为17.3%、16.7%、16.4%;在剪切速率为170s-1时共聚物黏度保留率为13.2%;在65℃下该共聚物盐溶液可提高原油采收率13.0%。
Starting from acrylic acid (AA), acrylamide (AM), sodium 3-allyloxy-2-hydroxy-propanesulfonate (AHSPE) and N, N-diallyl oleic acid amide (DNDA) A water - soluble tetrapolymer AA / AM / AHPSE / DNDA. The optimal synthesis conditions were as follows: temperature 35 ℃, pH = 7, m (AA): m (AM): m (AHPSE): m (DNDA) = 69.7:25:5:0.3% and initiator dosage 0.3% (wt, mass fraction, the same below). The copolymers were characterized by FT-IR and 1 H-NMR. The apparent viscosity of 2g / L copolymer solution was 35.1, 33.8 and 34.5mPa · s at 20, 2 and 2g / L Na +, Ca2 + and Mg2 +, respectively. The viscosity retention rates were 17.3%, 16.7% and 16.4% %; The viscosity retention of the copolymer is 13.2% at a shear rate of 170s-1; and the copolymer salt solution can increase the crude oil recovery by 13.0% at 65 ° C.