双丙酮丙烯酰胺共聚物的合成及其对稠油降黏性能的研究

SYNTHESIS OF DIACETONE ACRYLAMIDE TETRAPOLYMER AND STUDY ON REDUCING VISCOSITY OF CRUDE OIL

采用正交实验法,以降黏率为考核指标,对四元共聚物型油溶性降黏剂(DMSM)的合成工艺条件进行了优化,最佳条件为:n(双丙酮丙烯酰胺):n(甲基丙烯酸甲酯):n(苯乙烯):n(马来酸酐)=0.07:0.10:0.05:0.15,以甲苯为溶剂,偶氮二异丁腈为引发剂,共聚得到双丙酮丙烯酰胺/甲基丙烯酸甲酯/苯乙烯/马来酸酐四元共聚物;再以对甲苯磺酸为催化剂与十八醇进行酯化反应,制备了油溶性降黏剂 DMSM。实验表明,在胜利油田生产的脱水稠油中,当 DMSM 用量(质量分数)达到0.1%时,50℃降黏率为95.3%,净降黏率为56.7%。

Using viscosity reduction rate as the examination parameter, the reaction conditions for the synthesis of an oil-soluble viscosity reducer DMSM were optimized by orthogonally designed experi- ments. The optimum conditions were found as follows： molar ratios of diaeetone acrylamide, methyl methacrylate, styrene and maleic anhydride were 0.07 ： 0.10 ： 0.05 ： 0.15, toluene as solvent, and azodisobutyronitrile as initiator for the preparation of DAAM/MMA/St/MA co-polymer. Then with p-methylbenzenesulfonic acid as catalyst, the above prepared tetrapolymer reacted with octadecanol, forming a comb-like polymer, i. e. , the oil-soluble viscosity reducer DMSM. The test results showed that at 50 ℃, when the amount of the DMSM used reached 0.1%, the oil＇s viscosity reduction rate was as high as 95.3% ,with a net reduction rate being 56.7% of the water stripped viscous crude oil in Shengli Oil Field.