适用于含聚回注水的疏水缔合聚合物的综合性能*

Comprehensive Performance Evaluation of Associated Polymers Suitable for Reinjection Water Containing Polymer

阙庭丽 关 丹 焦秋菊 帕提古丽·麦麦提

QUE Tingli，GUAN Dan，JIAO Qiuju，PATIGULI·Maimaiti

新疆油田化学驱采用高矿化度含聚回注水作为注入水。研究了含聚回注水配制的普通聚合物HPAM和疏水缔合聚合物KYPAM的増黏性、流变性、黏弹性、长期稳定性、不可及孔隙体积（IPV）和驱油性能。研究结果表明：KYPAM 具有特殊的空间网状结构，在含聚污水中具有更好的增黏性、流变性、黏弹性；在含聚回注水中KYPAM 的抗老化能力好于 HPAM，经过 90 d 的老化后，质量浓度 1500 mg/L 的 KYPAM 溶液的黏度保留率为81.4%，而HPAM溶液的只有40.2%；在渗透率150×10-3 μm2左右岩心中，质量浓度为1500 mg/L的 KYPAM溶液的IPV为19.6%，而HPAM溶液的IPV为22.1%，KYPAM启动相对小孔喉的能力比HPAM高；在渗透率150×10-3 μm2左右的人造砾岩岩心中，水驱后注入0.5 PV的浓度为1200、1500 mg/L的聚合物溶液，KYPAM的驱油效率比HPAM的高2%~3%。图11表5参19

High salinity polymer-bearing reinjection water is used as injection water for chemical flooding in Xinjiang oilfield. The comprehensive performance of HPAM and hydrophobic associating polymer KYPAM prepared with polymer-containing reinjection water，including viscosity，rheology，viscoelasticity，long-term stability，inaccessible pore volume（IPV）and oil displacement performance，were evaluated. The results showed that KYPAM had better viscous，rheological and viscoelastic properties due to its special network structure. The anti-aging ability of KYPAM was better than that of HPAM. After aging for 90 days，the viscosity retention rate of KYPAM solution with the concentration of 1500 mg/L was 81.4%，while that of HPAM solution was only 40.2%. In the core permeability of 150×10-3 μm2，the IPV of 1500 mg/L KYPAM solution was 19.6%，while the IPV of HPAM solution was 22.1%. Compared with HPAM，KYPAM had a higher ability of starting relative pore-throat. In the core permeability of 150× 10-3 μm2，when 0.5 PV of polymer solution with the concentration of 1200—1500 mg/L was injected after water flooding，the oil displacement efficiency of KYPAM solution was 2%—3% higher than that of HPAM solution.

10.19346/j.cnki.1000-4092.2020.01.019