«Onshore and offshore oil and gas well construction»

Prospects for application of water and gas influence using CO₂ on a carbonate reservoir of oil and gas condensate field in the Eastern Siberia

UDC: 622.276.43
DOI: 10.33285/0130-3872-2023-11(371)-34-41

Authors:

¹ St. Petersburg Mining University, St. Petersburg, Russia
² Novtekhservice, Tyumen, Russia
³ North Caucasus Federal University, Stavropol, Russia

Keywords: geological characteristics of the field, calculation of the use of water-gas stimulation at the object in question, estimation of CO₂ injection volumes, modeling results of the CO₂ injection process, calculation of the economic efficiency of increasing oil recovery due to CO₂ injection

Annotation:

Currently, most of the fields in Russia and, in particular, the Eastern Siberia require reservoir pressure maintenance systems (RPM) and the problem of reducing the viscosity of oil at these objects is also urgent. The water-flooding systems increasing the oil recovery factor (ORF) by an average of 35% are most commonly used, but simple water-flooding is not enough in many cases and this situation forces companies to look for hybrid solutions using a combination of well-known methods for enhancing oil recovery. In recent years, the method of water-gas stimulation of the formation has been gaining popularity, because it combines the ability to significantly increase oil recovery factor by dissolving various gases in oil and thereby reducing fluid viscosity. The article analyzes the current state of the problem state of knowledge in view of carbon dioxide possible use in the fields of the Eastern Siberia. The existing technologies of water-gas stimulation of a formation using CO₂ were analyzed. The experience of using water-gas stimulation at a field in the Eastern Siberia and the structural features of the given field are considered. An option of a field development using carbonated water is proposed, and the effectiveness of the method is assessed using hydrodynamic and economic models.

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