摘要
CO_2的黏度和密度比原油低很多,在驱替过程中容易发生气窜。选择了起泡能力较好的发泡剂HY-3进行岩心实验。结果表明:随着气液比增大,泡沫稳定渗流阻力降低;随着发泡剂质量分数的增加,泡沫驱达到稳定渗流时的压差升高;在双管并联高、低渗透率岩心中,点滴注入发泡剂,并利用其所形成的泡沫体系控制CO_2气体的窜逸,达到了调整吸气剖面、扩大波及体积、增加采收率的目的。
Due to the much lower viscosity and density for CO2 than those of the crude oil, the gas channeling is prone to occur during the flooding process. HY-3 foaming agent is chosen for its high foaming capacity, and the corresponding core experiment is conducted. The results show that with the rise of the gas-liquid ratio, the stable seepage resistance of the foaming agent drops ; with the increase of the mass fraction, the pressure differential rises when the foam flooding is up to the stable seepage; in the double-barreled parallel cores with high and low permea- bilities, the foam agent is injected drop by drop and moreover with the help of the produced foam system, the CO2 channeling and escape are controlled, so the purposes of adjusting the gas-absorbing profiles, enlarging the swept volume and enhancing recovery are realized
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2013年第5期128-131,共4页
Petroleum Geology & Oilfield Development in Daqing
基金
中石油重大专项“CO_2驱扩大波及体积的表活剂体系及应用研究”(07-02Z-01-03)
黑龙江省自然科学基金(E201031)
省高校科技创新团队“提高油气采收率原理与技术”(2009td08)
关键词
CO2气窜
点滴注入
发泡剂
泡沫
均质岩心
稳定渗流阻力
大安油田
CO2
gas channeling
drop injection
foaming agent
foam
homogeneous core
stable seepage resist-ance
Daan Oilfield
