To compare the oil displacement mechanisms and performances of continuous phase flooding agent(traditional polymer solution) and dispersed phase flooding agent(particle-type polymer SMG dispersion), the particle phase...To compare the oil displacement mechanisms and performances of continuous phase flooding agent(traditional polymer solution) and dispersed phase flooding agent(particle-type polymer SMG dispersion), the particle phase separation of SMG dispersion migrating in pores was simulated by using the microfluidic technology. Theoretically guided by the tree fork concentration distribution of red cells in biological fluid mechanics, the concentration distribution mathematical model of SMG in different pores is established. Furthermore, the micro and macro physical simulation experiments of continuous and dispersed phase flooding agents were carried out. The results show that the continuous flooding agent enters all the swept zones and increases the flow resistance in both larger and small pores. On the contrary, the particle phase separation phenomenon occurs during the injection process of dispersed flooding agent. The SMG particles gather in the larger pore to form bridge blinding, and the carrier fluid displace oil in the small pore. Working in cooperation, the SMG particle and carrier fluid drive the residual oil in the low permeability layers step by step and achieve the goal of enhanced oil recovery. The laboratory experimental results indicate that, the oil increment and water reduction effect of dispersed flooding agent is much better than that of continuous flooding agent, which is consistent with the field test results.展开更多
以10μm硅胶为基质,异甘草素为配体,采用液相连续反应法及中间体法依次合成了异甘草素键合硅胶固定相ISLSP-Ⅰ和ISLSP-Ⅱ。采用FTIR及SEM对合成的固定相进行表征。将ISLSP-Ⅰ固定相填充于50 mm×10 mm i.d. 1号色谱柱中,将ISLSP-Ⅱ...以10μm硅胶为基质,异甘草素为配体,采用液相连续反应法及中间体法依次合成了异甘草素键合硅胶固定相ISLSP-Ⅰ和ISLSP-Ⅱ。采用FTIR及SEM对合成的固定相进行表征。将ISLSP-Ⅰ固定相填充于50 mm×10 mm i.d. 1号色谱柱中,将ISLSP-Ⅱ固定相填充于30 mm×10 mm i.d. 2号色谱柱中,系统评价了两种方法合成的固定相的色谱性能。结果表明:两根色谱柱的柱效及峰型均较好,大流速下测试组分的保留主要决定于传质阻力。在甲醇-水体系下,2号色谱柱表现出明显的反相色谱分离机制。合成的固定相稳定性良好,使用6个月后,测试组分在两根色谱柱上的保留时间相对偏差不超过0.9%。2号色谱柱对多组分标准样品及中药提取物均具有良好的分离能力。展开更多
基金Supported by the China Postdoctoral Science Foundation(Grant No.2018M641610)China National Science and Technology Major Project(2016ZX05025-003)
文摘To compare the oil displacement mechanisms and performances of continuous phase flooding agent(traditional polymer solution) and dispersed phase flooding agent(particle-type polymer SMG dispersion), the particle phase separation of SMG dispersion migrating in pores was simulated by using the microfluidic technology. Theoretically guided by the tree fork concentration distribution of red cells in biological fluid mechanics, the concentration distribution mathematical model of SMG in different pores is established. Furthermore, the micro and macro physical simulation experiments of continuous and dispersed phase flooding agents were carried out. The results show that the continuous flooding agent enters all the swept zones and increases the flow resistance in both larger and small pores. On the contrary, the particle phase separation phenomenon occurs during the injection process of dispersed flooding agent. The SMG particles gather in the larger pore to form bridge blinding, and the carrier fluid displace oil in the small pore. Working in cooperation, the SMG particle and carrier fluid drive the residual oil in the low permeability layers step by step and achieve the goal of enhanced oil recovery. The laboratory experimental results indicate that, the oil increment and water reduction effect of dispersed flooding agent is much better than that of continuous flooding agent, which is consistent with the field test results.
基金甘肃省中小企业创新基金项目(1110FCCG112)甘肃省微藻工程技术研究中心建设项目(1009FTGG017)+1 种基金Innovation Fund for Small and Medium-sized Technology-based Firms in Gansu Province(1110FCCG112)the Provincial Engineering Technical Research Center for Microalgae in Gansu(1009FTGG017)
文摘以10μm硅胶为基质,异甘草素为配体,采用液相连续反应法及中间体法依次合成了异甘草素键合硅胶固定相ISLSP-Ⅰ和ISLSP-Ⅱ。采用FTIR及SEM对合成的固定相进行表征。将ISLSP-Ⅰ固定相填充于50 mm×10 mm i.d. 1号色谱柱中,将ISLSP-Ⅱ固定相填充于30 mm×10 mm i.d. 2号色谱柱中,系统评价了两种方法合成的固定相的色谱性能。结果表明:两根色谱柱的柱效及峰型均较好,大流速下测试组分的保留主要决定于传质阻力。在甲醇-水体系下,2号色谱柱表现出明显的反相色谱分离机制。合成的固定相稳定性良好,使用6个月后,测试组分在两根色谱柱上的保留时间相对偏差不超过0.9%。2号色谱柱对多组分标准样品及中药提取物均具有良好的分离能力。
