Forecast of the phase state of hydrocarbons in natural reservoirs of the southeast of the West Siberian oil and gas province

Abstract

Forecast of the phase composition of hydrocarbons in reservoirs is an actual task for the efficiency of oil and gas exploration and production. One of the key principles of differential capture is the Maksimov–Savchenko–Gassou theory, according to which the phase composition of hydrocarbons in traps depends on thermobaric conditions during the formation of the fields. This work analyzes the phase saturation of traps using the example of the southern parts of the West Siberian and Timan-Pechora oil and gas provinces. The differential capture of hydrocarbons in these two provinces has the opposite trend, which nevertheless fits well with the existing theory. The possible distribution of the phase composition of hydrocarbons in the sequence of traps upwards of the reservoir for different geological objects is shown, which can serve as a good basis for reducing the economic risks of exploring oil and gas fields.