西安石油大学学报（自然科学版）2024，Vol.39Issue(1)：48-55,8.DOI:10.3969/j.issn.1673-064X.2024.01.006
耐温抗盐强乳化聚-表二元复合驱油体系研究及应用
Study and Application of Binary Composite Oil Displacement System of Polymer and Surfactant with Temperature Resistance,Salt Resistance and Strong Emulsification
摘要
Abstract
In view of the poor oil displacement effect of conventional polymers and surfactants in high-temperature high-salt reservoirs,a binary composite oil displacement system with temperature resistance,salt resistance and strong emulsification suitable for high-tem-perature high-salt reservoirs was developed by using temperature and salt resistant polymer SPAM-1 and anionic--non-ionic composite surfactant YANC-E.The comprehensive performance of the oil displacement system was evaluated through experiments.The results show that the binary composite oil displacement system has strong temperature resistance.After aging at 115 ℃,the viscosity retention rate of the system can still reach more than 90％and the interfacial tension can still reach the order of 10-3mN/m.The system has good salt resistance.When the salinity is greater than 100 000 mg/L,the system can still maintain high viscosity and low interfacial tension.The system has good long-term aging stability.Under the conditions of reservoir temperature and salinity,the viscosity retention rate of the system is more than 85％after aging for 60 days,and its interfacial tension is always maintained in the range of 10-3mN/m.The emul-sion formed by the oil displacement system and crude oil has strong stability.After 120 min,the water separation rate of the emulsion is less than 20％,and therefore it has strong emulsifying performance.The oil displacement system can still maintain high viscosity and low interfacial tension after adsorption for 6 times under formation conditions,and therefore it has good anti adsorption performance.In addition,when the binary composite oil displacement system of 0.5 PV is injected into core after water flooding,the oil recovery can be enhanced by more than 25％,and the oil displacement effect is good.After the implementation of the binary composite flooding measure in 5 oil production wells in block A,the daily oil production was significantly increased,and the water cut was significantly reduced.Good field application results are achieved.关键词
高温高盐/聚-表二元复合驱/乳化性能/吸附性能/驱油性能Key words
high temperature and high salt/polymer-surfactant binary composite flooding/emulsifying performance/adsorption perform-ance/oil displacement performance分类
能源科技引用本文复制引用
许文赟,潘彬,李鑫,王颐同,邵彤,朱璐..耐温抗盐强乳化聚-表二元复合驱油体系研究及应用[J].西安石油大学学报（自然科学版）,2024,39(1):48-55,8.基金项目
"十三五"国家科技重大专项"低渗透复杂油藏规模有效动用关键技术项目"(2017ZX05013) （2017ZX05013）
