丙烯酰胺/2-丙烯酰胺-2-甲基丙磺酸/N-辛基丙烯酰胺共聚物与石油磺酸盐的相互作用研究

通过研究丙烯酰胺/2-丙烯酰胺-2-甲基丙磺酸/N-辛基丙烯酰胺共聚物(HPPS)与石油磺酸盐复配体系的表观黏度、表/界面活性及吸附性质,讨论了两者的相互作用。结果表明,石油磺酸盐与质量浓度1.5 g/L聚合物HPPS复配溶液的表观黏度随着石油磺酸盐质量浓度的增大而上升,在其质量浓度为2.0 g/L时复配溶液表观黏度达到最大值后迅速下降。石油磺酸盐质量浓度低于0.5 g/L时复配溶液的表面张力值低于单独的石油磺酸盐溶液;之后则高于单独的石油磺酸盐溶液。复配溶液与胜利油田原油的界面张力高于单独的石油磺酸盐溶液,但最低值仍可达到1×10-2mN/m。聚合物HPPS与质量浓度为2.0 g/L的石油磺酸盐的复配溶液中,石油磺酸盐在地层砂上的静态吸附量随着聚合物HPPS质量浓度的增大而显著增大,当聚合物质量浓度为3.0 g/L时静态吸附量达到最大值。

Study on the Interaction between Copolymer Acrylamide/2-acrylamido-2-methylpropanesulfonic acid/Octylacrylamide and Petroleum Sulfonate

The viscosity, surface/interfacial activity and adsorption of copolymer acrylamide/2-acrylamido-2-methylpropanesulfonic acid/Octylacrylamide (HPPS) and petroleum sulfonate mixed system were studied. And the interaction was discussed. The results show that the viscosity of petroleum sulfonate/1.5g/L polymer HPPS mixed system increases as increasing the mass concentration of petroleum sulfonate, and reaches the maximum at mass concentration 2.0g/L, then viscosity declines fast. The surface tension of the mixed system is lower than that of single petroleum sulfonate when petroleum sulfonate mass concentration is below 0.5g/L, then the surface tension of the mixed system is higher than that of single petroleum sulfonate as the mass concentration increases. The interfacial tension between the mixed system and oil is higher than that of single petroleum sulfonate, but the minimum can reach 10-2mN/m. In polymer HPPS and 2.0g/L petroleum sulfonate mixed system the static adsorption of petroleum sulfonate on the reservoir sand increases as increasing the mass concentration of polymer HPPS, and reaches the maximum at HPPS mass concentration 3.0g/L.