摘要
CO2和高温蒸汽都在提高原油采收中被广泛应用。两者联合可以有效降低原油黏度、改善流动性,补充地层能量,提高波及效率。在高温蒸汽作用下,已溶解于原油的CO2会发生过饱和析出。析出气泡成核、生长和流动对地层多相流体分布及渗流有重要影响。本文通过孔隙尺度高压可视化实验系统,研究超临界CO2-油升温过饱和析出,探究了升温幅度和速率对过饱和析出气泡成核、生长和流动三个阶段的影响机理,同时也分析了气泡不同成核特征对后续生长和流动的影响规律。
Both CO2 and steam are widely used in enhancing oil recovery.The combination of CO2 and steam can effectively reduce the viscosity of crude oil,supplement the formation energy,and increase the sweep efficiency.Under the action of high temperature steam,CO2 dissolved in crude oil will be supersaturated and exsolution happens subsequently.The nucleation,growth and migration of the C02 have a significant impact on the distribution and flow of multiphase fluids in the reservoir.In this study,a pore-scale high-pressure visualization experiment system was applied to investigate the heating induced supersaturated precipitation of supercritical CO2-oil.The effects of heating range and rate on the nucleation,growth and migration processes of supersaturated CO2 were investigated.Meanwhile the impact of different nucleation characteristics on subsequent CO2 ganglia growth and migration was also analyzed.
作者
黄峰
胥蕊娜
姜培学
HUANG Feng;XU Rui-Na;JIANG Pei-Xue(Key Laboratory for Thermal Science and Power Engineering of Ministry of Education,Department of Energy and Power Engineering,Tsinghua University,Beijing 100084,China)
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2020年第11期2767-2773,共7页
Journal of Engineering Thermophysics
基金
国家自然科学基金资助项目(No.51536004)。
关键词
多孔结构
CO2
升温
过饱和
析出
porous media
CO2
heating
supersaturated
exsolution