喇嘛甸油田污水配制高分子高浓度聚合物驱油试验研究

大庆喇嘛甸油田聚合物驱过程中暴露出四个突出矛盾：一是采出污水外排污染环境，同时带来清水供应紧张：二是聚合物驱油成本较高，需进一步提高效益；三是超高相对分子质量聚合物能否成为高效驱油剂：四是调驱结合能否解决聚合物突进问题。通过几年来污水有效利用技术攻关，提出了采用高浓度、超高分子聚合物驱油技术方法。该技术与调剖方法相结合解决了聚合物突进问题，试验达到阶段采收率增加15．28％的好效果。矿场试验表明，清水配制母液、污水稀释高浓度超高分子聚合物驱，不仅可以实现污水利用，而且还可以提高原油采收率。

Field Application of Produced Water Make-up High-Molecular-Weight and High-concentration Polymer Flooding in Lamadian Oil Field

In the process of polymer flooding in Daqing Lamadian Oil Field,there are four prominent contradictions: first,discharging produced water pollutes environment and makes clean water short;second,polymer flooding with high cost,needs to enhance benefits at next step;third,ultra high molecular weight polymer can be high-efficient oil displacement agent or not;finally,the combination of profile modification and oil displacement can solve the problem on polymer breakthrough.A new high-concentration ultra-high molecular weight polymer flooding is provided after the research for utilizing produced water efficiently for several years.The technique combined with profile modification,solves polymer breakthrough and has a good effect that recovery rate is increased by 15.28% at the stage of experiment.Field experiment indicates,mother fluid made up with clean water and ultra-high molecular weight polymer diluted by produced water not only realize the re-usage of produced water,but also enhance oil recovery rate.