Improving the efficiency of gas fields development using an interlayer gas flow from Turonian to Cenomanian reservoirs

Abstract

There is currently a significant depletion of Cenomanian gas reserves in Western Siberia, which have been the basis of Russian gas exports. This raises the challenge of developing reserves that could offset these volumes, such as hard-to-recover gas reservoirs in Turonian formations overlying the Cenomanian. To date, there is virtually no experience of commercial exploitation of Turonian reservoirs, which, combined with their extremely low permeability, makes Turonian gas uneconomic to produce. In order to increase the economic viability of developing such reservoirs, the authors of the article propose a reservoir engineering method using an interlayer gas flow. This method allows you to reduce the initial costs. The article presents hydrodynamic calculations of the development of Turonian and Cenomanian reservoirs using a natural flow production and an inter-layer gas flow. The modelling results demonstrate the effectiveness of the proposed technology.