Abstract
The features of the formation of retrograde condensate in the reservoir and the method of its extraction are given. In order to improve the development of gas condensate fields and to reduce condensate losses under the reservoir pressure drawdown below the pressure of the beginning of condensate precipitation, the issue of the possibility of its extraction after precipitation in the reservoir by water or gas-water mixture displacement has been considered. The results of laboratory, analytical and field studies indicate that the retrograde condensation of the hydrocarbon mixture has a negative effect on almost all technological processes of condensate production. Reservoir condensate losses during the development of gas condensate fields in depletion mode are on average 60-78%. As an alternative to the cycling process, the use of a unified waterflooding system for the recovery of condensate from the reservoir has been considered. The results of laboratory studies are presented and the directions of the implementation of gas-water repression at gas condensate fields have been substantiated. The possibility of using reservoir gas available in the reservoir has been considered. In this case, the condensate was first flooded with water, and then, before the water broke out of the model, the system was degassed, reducing the pressure by 25% below the pressure of the onset of condensation, and again continued to displace the condensate with water. This procedure makes it possible to extract about 50% of the condensate dropped out in the reservoir