精细石油化工

针对海上油田平台施工面积及承载能力小，常规干粉类聚合物凝胶体系配制繁琐且初始黏度高的问题，以丙烯酰胺、丙烯酸和2-丙烯酰胺基-2-甲基丙磺酸为单体，通过反向乳液聚合制备了低阻、易溶解的乳液聚合物，进而构建了低阻聚合物凝胶在线调剖体系。实验结果表明，乳液聚合物完全溶解时间为12 min，质量浓度为6 000 mg/L时黏度为16.5 mPa·s，低阻聚合物凝胶体系成胶时间为48～53 h，成胶强度可达34 000 mPa·s。该体系初始黏度低，注入阻力系数为6.00，成胶后封堵率可达99.81%，注水冲刷6 PV后，封堵率仍达到98.59%，具有良好的封堵性及耐冲刷性。该体系在ZD-7井组现场应用效果显著，最高含水率下降8.2%，累计增油3 500 m³。

In response to the problems of limited construction area and low carrying capacity on offshore oilfield platforms, as well as the complicated preparation and high initial viscosity of conventional dry powder polymer gel systems, a low-resistance, a easily dissolved emulsion polymer was selected and a low-resistance polymer gel online profile control system was prepared. The experimental results show that the emulsion polymer completely dissolves in 12 min, with a viscosity of 16.5 m Pa·s at a concentration of 6 000 mg/L. The gelation time for the low-resistance polymer gel system was 48-53 h, with a gel strength of 34 000 m Pa·s. The initial viscosity of the system is low with the injection resistance coefficient of 6.00, and the plugging rate can reach 99.81% after gelation. The plugging rate is still 98.59% after being washed by 6 PV of water, showing good performance of plugging and resistance to washing. The field application effect of the system in the ZD-7 well group is significant, with the highest water cut decreasing by 8.2% and a total oil increase of 3 500 m³.