渤海油田二元复合驱相对渗透率实验研究

发布时间：2018-03-19 21:22

本文选题：二元复合驱　切入点：相对渗透率曲线　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：渤海油田已经过水驱开发,正在进行聚合物驱,目前需要研究聚驱后二元复合驱的实施方案。而二元复合驱相对渗透率曲线则在开发方案编制、油田开采动态预测以及油藏数值模拟中是不可缺少的重要数据,本文就二元复合驱相对渗透率曲线的实验测定方法和影响因素展开了研究与讨论。本文评价了常见聚合物增粘能力、热稳定性和耐剪切能力,常见表面活性剂与聚合物复配二元复合体系改善油水界面张力性能和热稳定性,以及聚合物、表面活性剂的匹配性,优选了AP-P5与BHF作为组成二元复合体系的化学剂。为了精细描述二元复合体系在岩心中的粘度,以便更加精确地计算相渗曲线。本文在优选二元复合体系的基础上,通过测定不同配方二元复合体系通过含油及不含油岩心后在岩心不同位置处的粘度,研究并得到了不同聚合物浓度二元复合体系通过多孔介质后粘度变化规律、二元复合体系在注入过程中的粘度变化规律,以及二元复合体系在多孔介质中不同位置处的粘度变化规律。结合二元复合体系在多孔介质中的粘度变化规律,改进了非稳态法测定二元复合驱相对渗透率曲线中粘度计算方法,并测定了不同毛管数、不同岩心渗透率、不同注入速度下的二元复合驱相对渗透率曲线,分析了这三种因素对二元复合驱相对渗透率曲线的影响。结果表明,随体系毛管数增大,残余油饱和度减小,驱油效率增大;体系中聚合物浓度越大,水相相对渗透率越小,残余油饱和度有所减小;体系中表活剂浓度越大,油水两相相对渗透率均有所增大,残余油饱和度有所减小;岩心渗透率增加,同一含水饱和度下水相相对渗透率增大,油相相对渗透率也略有升高,残余油饱和度降低;注入速度从0.5m/d增至3m/d时,同一含水饱和度下油水两相相对渗透率均有所增大,残余油饱和度有所降低;注入速度从3m/d增至8m/d时,同一含水饱和度下油水两相相对渗透率均有所下降,残余油饱和度有所增加。
[Abstract]:The Bohai oil field has been developed by water flooding and is carrying out polymer flooding. At present, it is necessary to study the implementation scheme of binary composite flooding after polymer flooding. The relative permeability curve of binary composite flooding is being compiled in the development plan. Oil field production performance prediction and reservoir numerical simulation are indispensable important data. In this paper, the experimental measurement methods and influencing factors of relative permeability curves of binary composite flooding are studied and discussed. The viscosity increasing ability, thermal stability and shear resistance of common polymers are evaluated in this paper. The binary composite system of surfactant and polymer can improve the interfacial tension and thermal stability of oil and water, and the matching of polymer and surfactant. In order to describe the viscosity of binary composite system in rock core and calculate the permeability curve more accurately, AP-P5 and BHF are selected as chemical agents to form binary composite system. In this paper, based on the optimal selection of binary composite system, By measuring the viscosity of binary composite systems with different formulations at different locations after passing through the oil-bearing and non-oil-bearing cores, the variation of viscosity of binary composite systems with different polymer concentrations through porous media was studied and obtained. The variation of viscosity of binary composite system in the process of injection and at different locations in porous media, combined with the change of viscosity of binary composite system in porous media, The viscosity calculation method in determining the relative permeability curve of binary composite flooding by unsteady state method is improved, and the relative permeability curves of binary composite flooding with different capillary numbers, different core permeability and different injection rate are determined. The influence of these three factors on the relative permeability curve of binary composite flooding is analyzed. The results show that with the increase of capillary number, the residual oil saturation decreases and the oil displacement efficiency increases, and the higher the polymer concentration in the system, the smaller the relative permeability of water phase. The relative permeability of both oil and water phases increases and the residual oil saturation decreases with the increase of the concentration of active agent in the system, the increase of core permeability and the increase of the relative permeability of the same water saturation in the water phase. The relative permeability of oil phase also increased slightly, and the residual oil saturation decreased, when the injection rate increased from 0.5 m / d to 3 m / d, the relative permeability of both phases increased and the residual oil saturation decreased at the same water saturation. When the injection rate increases from 3 m / d to 8 m / d, the relative permeability of both phases decreases and the residual oil saturation increases at the same water saturation.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE53

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