高温、高矿化度油藏的聚合物驱油剂性能评价

发布时间：2018-03-11 07:08

本文选题：高温高矿化度油藏　切入点：络合剂　出处：《东北石油大学》2015年硕士论文　论文类型：学位论文

【摘要】：胜利油田T区块储层埋藏深、温度高、地层水矿化度高,属于高温高盐油藏条件,常用的普通聚合物由于耐温、抗盐性较差,在高温、高盐油藏条件下的应用受到了限制。为了解决T区块聚合物驱提高采收率差的问题,迫切需要一种耐温抗盐的驱油用聚合物,对T区块提高驱油效率、增产有重要意义。本文用磺化聚合物与3500万聚合物、梳型聚合物分别在增粘性、耐温性、抗盐性、剪切稳定性、长期老化稳定性、阻力系数和残余阻力系数上进行了性能评价,得出了磺化聚合物的综合性能优于其它三种聚合物,优选出磺化聚合物作为T区块聚合物驱油剂。为了提高磺化聚合物的粘度,进一步提高原油采收率,选择了三乙醇胺和葡萄糖酸钠作为金属离子络合剂,并进行了复配实验,发现复配起到协同作用,增粘效果比加入单一络合剂更好;选择了硫代硫酸钠作为抗氧化剂,也起到较好增粘作用。进行了室内岩心驱油效果评价,结果表明复配络合剂和抗氧化剂共同使用对体系化学驱采收率的提升效果最佳,进行了驱油体系优化实验,得出最佳注入速度1m/d,最佳注入段塞体积0.57PV,最佳注入浓度1800mg/L。利用优化的配方进行了T区块驱油效果验证实验,其化学驱采收率达到了16.46%,能够满足该区块的采收率要求。
[Abstract]:The reservoir in T block of Shengli Oilfield is deep buried, high temperature, high salinity of formation water, which belongs to the condition of high temperature and high salt reservoir. The common polymer is used at high temperature because of its poor resistance to salt and temperature. The application of high salt reservoir is limited. In order to solve the problem of poor recovery by polymer flooding in T block, a high temperature and salt resistant polymer is urgently needed to improve the oil displacement efficiency of T block. In this paper, the properties of sulfonated polymer and 35 million polymer are evaluated in terms of viscosity, temperature resistance, salt resistance, shear stability, long-term aging stability, resistance coefficient and residual resistance coefficient, respectively. The comprehensive properties of the sulfonated polymer are superior to those of the other three kinds of polymers. The sulfonated polymer is selected as the polymer flooding agent in T block. In order to increase the viscosity of the sulfonated polymer and further improve the oil recovery, Triethanolamine and sodium gluconate were selected as metal ion complexing agents, and the results showed that the compound had synergistic effect and the viscosity increasing effect was better than adding a single complexing agent, and sodium thiosulfate was selected as an antioxidant. The results show that the combined use of complex complexing agent and antioxidants can improve the recovery efficiency of the chemical flooding system, and the oil displacement system optimization experiment is carried out. The optimum injection rate of 1 m / d, the optimal slug volume of 0.57 PVand the best injection concentration of 1800 mg / L were obtained. The oil displacement effect of T block was verified by the optimized formula, and the recovery factor of chemical flooding reached 16.46, which can meet the requirements of oil recovery in this block.
【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】：TE357.46

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