ABSTRACT
Natural gas, condensate, and oil are complex hydrocarbon mixtures with additions (sometimes essential) of non-hydrocarbon components. In the course of the development of an oil-gas-condensate formation, the reservoir flow of such a system is accompanied by several phase transitions which consist of the evaporation of oil (condensate) into the gaseous phase, forming the liquid phase, and so on. The summary effect of all the processes on the actual conditions of natural (extraction) and artificial (injection of different kinds of active agents) action on a formation, determines the efficiency of hydrocarbon recovery.
