聚合物微球注入工艺优化实验

Optimized Experiment of Polymer Microsphere Injection Process

摘要: 聚合物微球作为一种调驱剂用于低渗透油藏调剖十分有效。从注入量和注入段塞2方面对聚合物微球注入工艺进行优化。实验结果表明，对于超低渗油藏，300 nm微球具有较好的适应性，当注入质量分数为0.2%微球时，随着注入量增大，封堵率和采收率增加，当注入量为0.4 PV时，封堵率可达71.4%，采收率增幅25.2%，累计采收率78.9%，其效果最佳。相较于连续注入，采用周期注入方式具有更好的封堵效果。该实验结果对确定聚合物微球现场注入工艺参数有指导作用。

Abstract: Polymer microspheres were very effective as a profile control agent in low permeability reser-voirs. Process optimization was carried out from two aspects of injection volume and injection slug. The experimental results show that the 300 nm microsphere has good adaptability for ultra-low permeability reservoir. When the injection mass fraction is 0.2% microsphere, the plugging efficiency and recovery efficiency increase with the increase of injection volume. When the injection volume is 0.4 PV, the plugging rate can reach 71.4%, the recovery rate increases by 25.2%, and the cumulative recovery rate is 78.9%, which is the best. Compared with continuous injection, periodic injection has better plugging effect. The experimental results can be used to determine the process parameters of polymer microspheres in field injection.