On the issue of injection of CO2 into a gas-condensate deposit within the framework of the technology of extraction of oil and retrograde condensate at concentrations below the filtration threshold from gas-saturated oil and gas source deposits of oil and gas condensate fields, at the late stage of development

Abstract

The study was carried out as part of the work on the hydrodynamic justification of the technology for extracting oil and retrograde condensate at concentrations below the filtration threshold from gas-saturated oil and gas source deposits of oil and gas condensate fields, at the late stages of development. On the basis of a test multicomponent model using the key parameters of the Vuktyl oil and gas condensate field, it is shown that the injection of carbon dioxide, for the early replacement of the “dry” gas injected at the previous stage, entails risks of reducing the liquid hydrocarbon recovery factor and the risks of precipitation of asphaltene-paraffin deposits.