Research On Carbon Dioxide Flooding Technology In Extra-Low Permeability Fuyang Oilfield

Carbon dioxide flooding is based on CO2 as an oil displacement agent,or enhanced oil recovery technology.In the past twenty years,the rapid development of CO2 flooding technology has gradually become one of the main technologies of gas drive.Among all kinds of EOR methods,CO2 flooding is only one of the most promising EOR methods.In this paper,CO2 flooding experiment is carried out in a block of special Fuyang oilfield.The following four aspects are studied:Study on geological characteristics of 1.ultra low permeability Fuyang oilfield.It includes the study of microscopic characteristics of reservoir,the study of sedimentary micro facies,the sedimentary model and sedimentary micro facies of Fuyang reservoir,and the evaluation of reservoir heterogeneity.2.CO2 oil displacement laboratory evaluation experiment.According to the fluid properties of A block,the CO2 miscible pressure test,CO2 flooding test and long core CO2 flooding experiment were carried out.It provides the basis for the scheme compilation,numerical simulation and the evaluation of the field test effect.3.CO2 drive reservoir project.Based on the characteristics of oil reservoir development and the characteristics of gas injection development,the study of strata combination,well pattern deployment,injection production interval and injection scheme were carried out.4.the effect and understanding of the field development.The effect of block development is analyzed.