Abstract: With the implementation of the three oil recovery technology, although polymer flooding technology improves the oil recovery, it also brings new challenges to crude oil processing and gathering. High return pressure of oil gathering pipeline was caused by wax deposition of polymer flooding pipeline. Study was carried out on the heat cleaning of the polymer flooding gathering pipeline between the wellhead and the metering room after shutdown the well. The effects of heat washing water quantity, hot wash water temperature and different concentration of polymer on the dredging time were studied under different oil gathering radius. It was found that the hot wash water temperature was more obvious in the range of 65~70 ℃, which was calculated by the theoretical formula. When cleaning different polymer concentration pipelines, in the low water conditions, cleaning time of produced liquid with high concentration polymer was relatively longer. With the increase of heat washing water, there was no obvious change in the cleaning time of the sediment with different concentration.

Key words: Polymer flooding, Sediment dredging pipeline, Heat washing, Heat washing parameters

摘要： 随着三次采油技术的实施，聚合物驱油技术在提高采收率的同时也给地面原油处理、加工及集输带来了新的挑战。针对聚合物驱管道结蜡淤积导致集油管线高回压问题，停输后对井口到计量间的聚合物驱集油管道进行热洗清淤研究。探究在不同集油半径条件下，热洗水量、热洗水温及不同含聚质量浓度的淤积物对清淤时间的影响。通过理论公式计算清淤时间及实验结果发现，热洗水温在65~70 ℃增加热洗清淤效率最明显。对于不同含聚质量浓度的淤积管线进行清洗时，在低热洗水量的条件下，高含聚采出液的淤积物清洗时间相对更长。随着热洗水量的增加，不同含聚质量浓度淤积物的清洗时间几乎相等，没有明显变化。

关键词: 聚合物驱, 管道淤积物, 热洗清淤, 热洗参数