| 摘要: |
| 针对油田实际需求,利用仪器测试和理论分析方法,对碱/表面活性剂/聚合物(ASP)三元复合体系黏度、界面张力、静吸附特性、流变性和流动特性进行了系统评价。结果 表明,随碱浓度增加,三元复合体系黏度和界面张力降低；随表面活性剂浓度增加,三元复合体系黏度先降后升,界面张力降低。在三元复合体系中,表面活性剂静吸附量最大,碱次之,聚合物最小。随碱浓度增加,三元复合体系黏弹性降低；表面活性剂对三元复合体系黏弹性影响不大。流动性实验表明,溶剂水除垢后三元复合体系阻力系数和残余阻力系数变小。随碱浓度降低、聚合物浓度升高和岩心渗透率降低,三元复合体系阻力系数和残余阻力系数增大；随表面活性剂浓度增加,三元复合体系阻力系数和残余阻力系数呈现“先减小后增大”的变化趋势。 |
| 关键词: 三元复合体系 黏度 界面张力 静吸附 流变性 阻力系数 机理分析 |
| DOI：10.3969/j.issn.1007-3426.2014.02.014 |
| 分类号:TE357,6+3 |
| 基金项目:中国石油吉林油田公司重点科技攻关课题“西5-16区块聚合物驱油藏工程试验研究”(JS10-W-13-JZ-05-09)。 |
|
| Performance evaluation and mechanism analysis of ASP system with high concentration |
|
Niu Liwei1, Lu Xiangguo1, Li Jianbing2, Yang Min3, Hu Yong4, Hu Shuqiong1, Yuan Shengwang1
|
|
1.Key Laboratory for Enhanced Oil Recovery of the Ministry of Education, Northeast Petroleum University, Daqing 163318, Heilongjiang, China;2.Eighth Plant of Daqing Oilfield Ltd, PetroChina, Daqing 163514, Heilongjiang, China;3.Research Institute of Exploration and Development, PetroChina Tarim Oilfield Company, Korla 841000,Xinjiang, China;4.Langfang Branch of PetroChina Exploration & Development Research Institute, Langfang 065007, Hebei, China
|
| Abstract: |
| Aiming at actual demand of oilfields, the viscosity, interfacial tension, static adsorption property, rheological behavior and flow characteristics of alkali/surfactant/polymer (ASP) system have been evaluated through instrument test and theoretical method. The results showed that with the increase of alkali concentration, viscosity and interfacial tension of ASP system decreased. With the increase of surfactant concentration, viscosity and interfacial tension of ASP system decreased. With the increase of surfactant concentration, viscosity of ASP system first decreased then increased, and interfacial tension decreased. In the ASP system, static absorption of surfactant was the largest, then alkali followed and polymer came last. With the increase of alkali concentration, viscoelasticity of ASP system decreased. Surfactant had little impact on the viscoelasticity of Asp system. As is showed in flow characteristics experiments, resistance coefficient and residual resistance coefficient of ASP system decreased after descaling of solvent water. With the decrease of alkali concentration, polymer concentration increased and core permeability decreased, resistance coefficient and residual resistance coefficient of ASP system increased. With the increase of surfactant concentration, resistance coefficient and residual resistance coefficient of ASP system first decreased then increased. |
| Key words: ASP system viscosity interfacial tension static adsorption rheological behavior resistance coefficient mechanism analysis |
