大庆石油地质与开发2018，Vol.37Issue(1)：128-133,6.DOI:10.19597/J.ISSN.1000-3754.201706040
特低渗透油藏CO2驱油室内实验与矿场应用
INDOOR EXPERIMENT AND FIELD APPLICATION OF CO2 FLOODING IN ULTRA-LOW PERMEABILITY OIL RESERVOIRS
摘要
Abstract
The ultra-low permeability reservoirs are abundant in Yanchang Petroleum,and moreover the following problems occur in the process of the oilfield development:easy to water sensitivity,difficult to water inject and so forth.CO2 flooding can effectively complement the reservoir energy,improve the crude oil properties and enhance the oil recovery.With the help of CO2-stratigraphic crude oil contact experiment,core seepage and displacement laboratory experiments,the two-phase seepage characteristics of the CO2 and stratigraphic crude oil were characterized,and the CO2 oil flooding mechanism and the oil displaced characteristics were analyzed,and furthermore the field test was implemented in Jingbian ultra-low permeability oil reservoir.The research results show that the CO2-oil two-phase flow has a large two-phase seepage zone in the ultra-low permeability reservoir,and the CO2 has the obvious effects of reducing the viscosity of the crude oil and expanding the volume of the crude oil,both immiscible and miscible floodings can more better develop the ultra-low permeability reservoir,before the gas breakthrough for the producers and in the interval of low gas-liquid ratio are the main production periods of the reservoir.The CO2 flooding field test shows that for the ultra-low permeability reservoir,the gas injectivity is two times than that of the water;the injected gas can rapidly add the formation energy and enhance the oilfield production.At present,the promising prospects of the daily liquid and oil productions occur in a while for the test block.关键词
特低渗透油藏/渗流特征/CO2驱油/CO2驱矿场试验Key words
ultra-low permeability oil reservoir/seepage characteristic/CO2 oil flooding/CO2 field test分类
能源科技引用本文复制引用
赵永攀,赵习森,李剑,姚振杰,赵洋..特低渗透油藏CO2驱油室内实验与矿场应用[J].大庆石油地质与开发,2018,37(1):128-133,6.基金项目
陕西省科技统筹创新工程计划项目(2014KTZB03-02-05(2)). （2014KTZB03-02-05(2）
