ANALYSIS OF EFFICIENCY OF APPLYING CYCLING IN RESERVOIR DEVELOPMENT OF GAS CONDENSATE

The relevance of the research is conditioned by the processes of retrograde condensation while developing gas-condensate reservoirs at oil and gas fields. Due to these processes the reservoir losses its significant volumes of high-boiling components of C5+ hydrocarbon group, the production of which would be an additional income source for oil companies. The total reserves of gas condensate in Russia is about two billion tons. Therefore, to solve the problem of the fullest extraction of gas-condensate reservoir components it is necessary to implement new production methods. The research aim is to justify the efficiency of cycling technology in gas-condensate reservoir development. Subject: N field located in the territory of the Eastern Siberia. Methods: compositional, geologic, and hydrodynamic simulation of gas-condensate reservoir Results. The paper presents the results of gas-condensate formation fluid compositional simulation in accordance with gas and condensate sample composition as well as gas-condensate study. Simplified geologic model of studied reservoir has been built and hydrodynamic simulation of its condition has been performed for different recovery mechanisms. Comparative analysis of gas condensate reservoir development parameters (condensate recovery factor, C-2-C-4 recovery factor, and condensate-gas factor) at different recovery mechanisms proved that application of cycling results in increase of extraction of hydrocarbon group C5+ component and allows solving a number of economic and environmental problems. It is possible to adapt the model to the required geologic conditions to use the given technology in the territory of Eastern Siberia and other petroleum provinces.