基于Fe2+质量浓度变化的聚合物黏度损失影响因素

Polymer viscosity loss influence analysis with changeable Fe2+ mass concentration

王刚 段举 胡学恒 武佳 李科 王金生

中国石油玉门油田分公司老君庙采油厂，甘肃 酒泉 735019

Laojunmiao Oil Production Plant, Yumen Oilfield Company, PetroChina, Jiuquan 735019, China

针对Fe2+的存在会对聚合物溶液黏度造成较大损失的问题，考察了Fe2+对聚合物黏度的影响情况。结果表明：1）当Fe2+初始质量浓度大于20 mg/L时，聚合物溶液会生成絮状胶体物质，造成滤膜孔隙堵塞。2）体系中还原性条件缺失时，聚合物黏度损失只取决于限量反应物（Fe2+或O2）的初始质量浓度，当Fe2+或O2其中一种物质反应完全时，聚合物黏度损失停止。3）当剪切速率为8.0 s-1，Fe2+初始质量浓度小于0.32 mg/L时，聚合物黏度损失不超过10%；当剪切速率为0.2 s-1，Fe2+初始质量浓度小于1.30 mg/L时，聚合物黏度损失不超过25%。4）聚合物黏度损失会随聚合物初始质量浓度增加而减弱。

Since the content of Fe2+ causes a marvelous loss of polymer fluid viscosity, the potential influence of Fe2+ on polymer flooding was studied in this article. The results show that when the initial mass concentration of Fe2+ is greater than 20 mg/L, the solution system will produce flocculent colloids, leading to filter membrane porosity block; under short-redox condition, the loss of polymer viscosity depends on the preliminary mass concentration of limited reactant Fe2+ or O2, and polymer viscosity loss would stop when anyone of Fe2+ or O2 consumes completely; moreover, with shearing rate at about 8.0 s-1 and initial Fe2+ mass concentration less than 0.32 mg/L, polymer viscosity loss never exceeds 10%; with shearing rate at about 0.2 s-1 and initial Fe2+ mass concentration less than 1.30 mg/L, polymer viscosity loss never exceeds 25%. The viscosity loss of polymer would drop off as the polymer concentration increases.

10.6056/dkyqt201903022