Main Controlling Factor of Polymer-Surfactant Flooding to Improve Recovery in Heterogeneous Reservoir
Main Controlling Factor of Polymer-Surfactant Flooding to Improve Recovery in Heterogeneous Reservoir
复制标题
非均质油藏聚合物表面活性剂驱提高采收率的主控因素
DOI：
10.1155/2017/5247305
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发表时间：
2017-01-01
影响因子：
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通讯作者：
Zhao, Dongfeng
中科院分区：
文献类型：
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作者：
Yin, Dandan;Zhao, Dongfeng
研究了粘度和界面张力对非均质油藏采收率的影响，确定了聚合物-表面活性剂复合驱的主控因素。通过静态和驱油实验，研究了矿化度和剪切作用对聚合物粘度的影响，以及表面活性剂浓度对化学剂与原油界面张力和乳化行为的影响。结果表明，提高聚合物GF-11（HPAM）的浓度可以降低矿化度的影响，GF-11具有较高的抗剪切性能。在吉林油田条件下，当表面活性剂浓度为0.3wt%时，油水界面张力可达10（-3）mN/m。界面张力越低，越容易形成乳化液。用该体系进行了7次驱油实验。结果表明，在聚合物和表面活性剂的协同作用下，采收率可提高5.02%~ 15.98%。在非均质油藏中，采收率的贡献小于波及体积的贡献。
This study aims to analyze the influence of viscosity and interfacial tension (IFT) on the recovery in heterogeneous reservoir and determines the main controlling factors of the polymer-surfactant (SP) flooding. The influence of the salinity and shearing action on the polymer viscosity and effects of the surfactant concentration on the IFT and emulsion behavior between chemical agent and oil were studied through the static and flooding experiments. The results show that increasing the concentration of polymer GF-11 (HPAM) can reduce the influence of the salinity and GF-11 has high shear-resistance property. In the condition of the Jilin Oilfield, the oil/water IFT can reach 10(-3) mN/m when the surfactant concentration is 0.3 wt%. The lower the IFT is, the easier the emulsion of SP and oil is formed. Seven flooding experiments are conducted with the SP system. The results show that the recovery can be improved for 5.02%-15.98% under the synergistic effect of the polymer and surfactant. In the heterogeneous reservoir, the contribution of oil recovery is less than that of the sweep volume.