Abstract: In order to evaluate the influence of the construction parameters of the plugging agent on the plugging removal effect, the plugging sequence and the displacement optimization of the polymer flooding wells were studied with the plugging removal rate as the evaluation index. The core experiment was carried out through the displacement of injection plugging agent and the injection order of three main chemicals, and the best construction parameters (including the best displacement and the injection sequence) were obtained. Experimental results showed that polymer injection well plugging agent were higher than 70% by changing injection order of chemical. When the organic scale corrosion agent, polymer degradation agent and solid blocking agent were injected sequentially, the plugging removal rate was the highest, and the plugging removal effect was better than other injection combinations. For the permeability of core 300 mD, when the displacement of plugging agent is larger than 0.1 mL/min, the displacement had little influence on the plugging removal effect, and the blockage removal rate was above 90%. In order to speed up the construction schedule and shorten the cycle, large displacement injection should be used. when the core permeability is 100 mD, plugging rate was less than 90%. With the increase of displacement, the rate of plug removal decreased. In order to achieve good plugging removal effect, it was advisable to choose the lower injection displacement. The higher the permeability, the better the final solution. The plugging effect of polymer flooding can be further improved by optimizing the injection sequence and displacement of the plugging agent, which can provide the basis for improving the quality of plug removal.

Key words: Blocking remover, Permeability, Discharge, Optimization

摘要： 为评价解堵剂施工参数对解堵效果的影响，以解堵率为评价指标，开展了注聚井解堵剂注入顺序及排量优化研究。通过对注入解堵剂的排量和三种主要药剂注入顺序开展岩心实验，获得最佳的施工参数（包括最佳排量和注入顺序），提高解堵效果。结果表明，改变药剂注入顺序，注聚井解堵剂均高于70%；采用有机垢溶蚀剂聚合物降解剂固形堵塞物溶蚀剂依次注入顺序时，解堵率最高，解堵效果明显优于其他注入组合。对于渗透率300 mD岩心，当注入解堵剂排量大于0.1 mL/min后，排量对解堵效果影响不大，解堵率均达到90%以上，效果良好，为了加快现场施工进度，缩短周期，宜选用大排量注入；当岩心渗透率为100 mD，各排量下的解堵率均低于90%，随排量增大，解堵率递减，此时，为了实现好的解堵效果，选择较低的注入排量为宜。渗透率越高，优化排量下最终获得的解堵效果越好。通过优化解堵剂注入顺序及排量可以进一步改善聚驱解堵效果，为提高解堵质量提供依据。

关键词: 解堵剂, 渗透率, 排量, 优化