在砂岩多孔介质中HPAM流量和注射性的动力学
M S Mousapour1, M Simjoo2, M Chahardowli1
1Faculty of Petroleum and Natural Gas Engineering, Sahand University of Technology, Tabriz, Iran.
Scientific reports
|November 20, 2024
概括
在增强石油回收 (EOR) 中使用的高分子量 (HM) 聚合物在储中显示出更大的保留和透性降低. 在HM聚合物中,剪切加厚行为与Deborah数有关,影响了EOR项目设计.
科学领域:
- 石油工程是石油工程中的一个.
- 聚合物科学 聚合物科学
背景情况:
- 化学增强石油回收 (CEOR) 使用聚合物泛滥来改善石油回收.
- 在成功的聚合物泛滥项目中,选择最佳的聚合物特性 (类型,分子量,度) 是至关重要的.
研究的目的:
- 通过多孔介质研究基于基烯胺 (HPAM) 的增强油回收 (EOR) 聚合物的流动行为,其分子重量不同.
- 分析聚合物分子重量和度对吸附,注射性和粘弹性特性的影响.
主要方法:
- 动态吸附和注射性测试使用含有低 (LM; 8-10 MDa) 和高 (HM; 20-25 MDa) 分子重量的HPAM溶液的沙袋进行.
- 目标粘度为7,15和30cP的聚合物溶液在储条件下 (80°C,1000 psi) 进行了测试.
- 测量了残留电阻因子 (RRF) 和电阻因子 (RF),计算了聚合物放松时间和Deborah数.
主要成果:
- 与LM溶液相比,HM聚合物溶液的保留率更高,并在砂袋中导致更大的透性降低 (更高的RRF).
- 虽然RF和in-situ粘度是可比的,但HM聚合物在更高的目标粘度下显示出明显的剪切加厚.
- 发现剪切加厚行为受到Deborah数的控制,这取决于分子量,度和注射速率.
结论:
- 较高分子量HPAM聚合物导致聚合物保留率增加,并在多孔介质中降低透性.
- 德博拉数有效地描述了HPAM聚合物溶液中的剪切加厚现象,受分子量,度和注射速率的影响.
- 精心选择聚合物分子量和度对于优化聚合物泛滥EOR项目至关重要.
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