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对EOR的聚合物-表面活性剂二进制洪水的协同优化:配方,污泥设计和盐度效应的核心规模实验分析

Wenjie Tang¹, Patiguli Maimaiti¹, Hongzhi Shao¹

¹Research Institute of Exploration and Development, Xinjiang Oilfield Company, PetroChina, Karamay 834000, China.

|August 28, 2025

概括

用0.5%的表面活性剂和0.15%的聚合物混合物优化油的回收率提高了42.19%. 这种化学增强石油回收 (EOR) 方法平衡粘度,界面张力降低和现场应用的操作因素.

科学领域:

石油工程
化学工程
增强石油回收 (EOR)

背景情况:

在油田开发的中后阶段, 常规的水淹没效果较差.
降低回收率需要使用化学增强石油回收 (EOR) 等先进技术.
聚合物-表面活性剂二元浸是改善石油开采的关键EOR技术.

研究的目的:

在核心泛滥实验中研究聚合物-表面活性剂二元配方的协同效应.
确定最佳度,注入量和盐度条件以提高油的回收.
为优化聚合物表面活性剂泛滥的现场应用提供实验数据.

主要方法:

使用各种聚合物表面活性剂度和注射量进行了核心泛滥实验.
测量表面张力 (IFT),以评估表面活性剂的有效性.
通过改变总溶解固体 (TDS) 来分析盐度敏感性,以评估粘度和恢复影响.

主要成果:

最佳配方 (0.5%表面活性剂,0.15%聚合物) 的最大增量油回收率为42.19%.
这种配方降低了界面张力 (IFT) 到0.007 mN/ m.
使用0. 5孔体积 (PV) 的注射体积和具有度梯度的顺序注射体积是最有效的.
较高的TDS降低了粘度,而低的TDS提供了最小的恢复增强,尽管粘度更高.

结论:

这项研究提供了优化聚合物表面活性剂泛滥策略的实验验证.
控制粘度,减少IFT和运行可行性的平衡对于现场成功至关重要.
这些发现为使用化学EOR增强成熟油田的石油回收提供了实用见解.

关键词:

优化 EOR 的方法接口张力聚合物表面活性剂二进制泛滥盐度敏感性

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