摘要
针对水驱稠油开发效果差、采收率较低的问题,在稠油热水驱室内实验研究的基础上发现,冷/热水交替驱稠油的开发效果更好,与同温度的热水驱相比能提高采收率4.5%。进一步深入研究冷/热水交替驱稠油的注入参数,优化注入参数结果为:注入热水段塞温度为80℃,冷水和热水段塞比为1∶1,注入速度为0.5 m L/min,采出程度可达到65.1%。分析表明,冷/热水交替驱稠油与热水驱稠油相比,能够提高水的波及体积,并对油藏能够产生一定的震动作用,因此驱替效果更好。
Amiding at the issue that the recovery of water flooding heavy oil is very low,cold /hot water alternative flooding is found to be a better development method for heavy oil. The recovery percent of cold / hot water alternative flooding is 4. 5% more than hot-water flooding. Study further on the injection parameter of cold / hot water alternative flooding and optimize the injection parameter： hot-water slug temperature 80 ℃,slug ratio of cold-water slug and hot-water slug 1∶ 1,injection rate 0. 5 m L / min. The recovery percent could reach 65. 1% under the optimal injection parameters. Analysis of the mechanism shows that cold / hot water alternative flooding could increase the swept volume of water and has a weak shock to the reservoir,so the effects of cold / hot water alternative flooding is better.
出处
《科学技术与工程》
北大核心
2015年第28期140-143,共4页
Science Technology and Engineering
关键词
冷/热水交替驱
稠油
提高采收率
机理
cold /hot water alternative flooding；heavy oil；enhanced oil recovery；mechanism
