摘要
为解决蒸汽驱过程中发生的蒸汽超覆和汽窜问题,以磺酸盐表面活性剂ZAS、聚醚磺酸盐表面活性剂ZCP-1和改性纳米硅颗粒NS复配研制了配方为0.5%ZAS/ZCP-1(复配比3∶1)+1.0%NS的三相泡沫调驱体系,并通过实验评价该体系的泡沫性能、耐温性能、封堵性能和驱油性能。研究结果表明,该三相泡沫体系的泡沫性能优异,常温下泡沫体积为680 mL、析液半衰期为26.67 min、泡沫半衰期为12 h,300℃热老化处理后性能稳定;该三相泡沫体系在300℃高温条件下可以稳定存在且具有较好的封堵性能,能选择性封堵高渗透层,对不同渗透率(1000×10^(-3)~4000×10^(-3)μm^(2))填砂管的阻力因子均大于30,阻力因子随着岩心渗透率的增加而增大。在渗透率级差为1∶2的非均质条件下可有效改善吸汽剖面,大幅提高低渗模型采收率,综合采收率可提高17.93%,具有良好的提高蒸汽驱采收率潜力。
To solve steam overriding and steam channeling in steam flooding,sulfonate surfactant ZAS,polyether sulfonate surfactant ZCP-1 and nanoparticle NS were compound to found a three-phase foam system with temperature resistance of 300℃which formula was 0.5%ZAS/ZCP-1(mixed proportion was 3∶1)+1.0%NS.Then evaluated its foam performance,temperature resistance,plugging performance and oil displacement performance was evaluated through experiments.The results showed that the three-phase foam system had excellent foam performance at room temperature,the foam volume was 680 mL,the liquid half-life was 26.67 min,and the foam half-life was 12 h,and it was stable after heat aging at the temperature of 300℃.The three-phase foam system could stably exist at a high temperature condition of 300℃and had blocking ability to selectively seal high permeability layers.Its resistance factor was greater than 30 within the permeability range of 1000×10^(-3)—4000×10^(-3)μm^(2),meantime,its blocking ability increased with the increase in permeability.Under the heterogeneous condition with a permeability difference of 1∶2,it could improve the total oil recovery by 17.93%,as a result of adjusting the steam absorption profile and increasing the oil recovery of the low-permeability model.The three-phase foam system has good potential to improve the oil recovery of steam flooding.
作者
郑家桢
张贵才
裴海华
单景玲
蒋平
吴晗
ZHENG Jiazhen;ZHANG Guicai;PEI Haihua;SHAN Jingling;JIANG Ping;WU Han(College of Petroleum Engineering,Petroleum University of China,Qingdao,Shandong 266580,P R of China;Key Laboratory of Unconventional Oil&Gas Development(China University of Petroleum(East China)),Ministry of Education,Qingdao,Shandong 266580,P R of China)
出处
《油田化学》
CAS
CSCD
北大核心
2022年第1期82-86,92,共6页
Oilfield Chemistry
基金
国家重点研发计划“稠油化学复合冷采基础研究与工业示范”(项目编号2018YFA0702400)
山东省自然科学基金项目“纳米颗粒稳定乳状液在油藏孔隙介质中形成条件及流度控制机理研究”(项目编号ZR2019MEE085)。
关键词
三相泡沫
蒸汽驱
调驱剂
改性纳米硅颗粒
提高采收率
three-phase foam
steam flooding
control and flood agent
nanoparticles
enhanced oil recovery
