Title: Research and evaluation of CO_2injection in waterflooding reseroirs
Abstract: Water injection has been mature, however, oil recovery by waterflooding is usually low.In this paper,elaborating the variation characteristics of reservoir after waterflooding, expansion of clay minerals,permeability reduction, injection pressure is too high,which makes recovery could not been improved much more. Introducing CO2miscible and non-miscible flooding technology,comparative analysis of injection means:continuous CO2injection,water alternating CO2injection etc. and water alternating CO2injection is the best injection method after waterflooding.It not only can reduce crude oil viscosity,make oil swelling,decrease boundary tension etc,also can reduce viscous fingering,prevent gas breakthrough in the early. By feasibility analysis of field application,shows that CO2injection has a good applicationprospect for oil reservoir after waterflooding in China.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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