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首页> 外文期刊>Journal of Applied Polymer Science >The Effect and Analysis on Cr~(3+) Gel Improving Profile Control in Alkalescent Alkaline/Surfactant/Polymer Flooding
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The Effect and Analysis on Cr~(3+) Gel Improving Profile Control in Alkalescent Alkaline/Surfactant/Polymer Flooding

机译：碱性碱性/表面活性剂/聚合物驱中Cr〜（3+）凝胶改善剖面控制的效果与分析

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摘要

The emulsification of produced fluid and the scaling along production system have always been one of the most difficult problems in NaOH/surfactant/ polymer flooding. To decrease those influences on production, the pilot test of Na_2CO_3 /surfactant/polymer flooding was developed in Daqing Oilfield. The results show fluid emulsification and scaling of production system were prevented effectively, but scaling along the injection system appeared and reservoir heterogeneity was aggravated. This is becoming a new technical problem. By analyzing scaling mechanism and the property of profile control agent, the author presents a technical solution that using Cr~(3+) polymer gel is improving fluid entry profile of injection well in Na_2CO_3/surfactant/polymer flooding. Optimization of formula and evaluation of its property and its compatibility with Na_2CO_3/surfactant/ polymer flooding system were investigated and a pilot test was conducted in well B2-1-P56 of Daqing Oilfield. The results shows polymer gel has dual function, i.e., removing scale and plugging off high permeability zone. The scale in the instrument of injection, pipes and wellside of wellbore is thoroughly cleared up. The fluid entry into high permeability layer is decreased from 100 to 64.9%, and fluid entry in low and intermediate permeability layer is increased from 0 to 35.1%. The profile control of injection well is effectively improved.
机译：产出液的乳化和沿着生产系统的结垢一直是NaOH /表面活性剂/聚合物驱的最困难的问题之一。为减少对生产的影响，在大庆油田开展了Na_2CO_3 /表面活性剂/聚合物驱的先导试验。结果表明，有效防止了流体乳化和生产系统的结垢，但沿注入系统出现结垢，并加剧了储层非均质性。这正在成为一个新的技术问题。通过分析结垢机理和调剖剂的性能，提出了使用Cr〜（3+）聚合物凝胶改善Na_2CO_3 /表面活性剂/聚合物驱中注入井流体进入剖面的技术方案。对大庆油田B2-1-P56井的配方优化，性能评价及与Na_2CO_3 /表面活性剂/聚合物驱体系的相容性进行了研究。结果表明，聚合物凝胶具有双重功能，即去除水垢并堵塞高渗透性区。彻底清除了注入仪器，管道和井眼中的水垢。进入高渗透率层的流体从100％减少到64.9％，而低渗透率和中等渗透率层中的流体进入从0％增加到35.1％。有效改善了注入井的剖面控制。

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