大庆石油地质与开发2013，Vol.32Issue(2)：122-125,4.DOI:10.3969/J.ISSN.1000-3754.2013.02.024
特低渗透油藏CO2—水交替注入特征和效果
CHARACTERISTICS AND EFFECTS OF THE CO2-WATER ALTERNATIVE INJECTION IN EXTRA-LOW-PERMEABILITY OIL RESERVOIRS
摘要
Abstract
Taking the cores of extra-low-permeability reservoir in Jilin Oilfield as example, the long core oil-flooding experiments are engaged for different flooding programs. The studies show that when the gas-water ratio is 2: 1 , the maximum ultimate recovery (60. 45% ) can be realized and the minimum ultimate recovery of the water flooding is 39. 56%. The relation between the experimental ultimate recoveries for different gas-water ratios and the CO2 volume proportion to the total injected fluid are positively correlated; and furthermore the water breakthrough times for different displacing experiments are not the same. The gas-water alternating injection can result in lagging behind of the water breakthrough times; when the gas is broken through, the injected volume of the gas is about 0. 2 PV. There is an accordant change trend in the total pressure gradients of water flooding and CO2 flooding experiments ; on the contrary, there is much seriously different in the change trends of the total pressure gradients for the experiments of 1: 1 and 1: 2 gas-water ratios comparing with the mentioned ratio(2: 1 GWR).关键词
特低渗透油藏/CO2-水/水驱油/CO2驱油/气、水比Key words
extra-low-permeability oil reservoir/ CO2-water/ oil flooded by water/ CO2 oil flooding/ gas-water ratio分类
能源科技引用本文复制引用
章星,杨胜来,李芳芳,陈浩,聂向荣,丁景臣..特低渗透油藏CO2—水交替注入特征和效果[J].大庆石油地质与开发,2013,32(2):122-125,4.基金项目
国家重点基础研究发展计划"973"计划项目(2011CB707300). （2011CB707300）
