Selection of optimal parameters of Talakh horizon development taking into account its geological features in the fields of Eastern Siberia

Background. This paper discusses the determination of optimal development system parameters for earlystage gas projects in Eastern Siberia using analytical models. It explores the relationship between these optimal parameters, geological characteristics, and economic conditions. Based on the test data of actual wells, the filtration resistance coefficients a and b, which depend on many factors, including the filtration-capacitance properties of the reservoir, were determined.

The purpose of the work is to determine the optimal number of the design well stock, to assess the influence of geological and economic parameters on the optimal parameters of the gas field development system.

Materials and methods. Calculations were conducted using an analytical technical and economic model that describes the gas field development system. This model is built upon the standard inflow equation for gas wells and material balance equations.

Results. Calculations based on the methodology showed stability of optimal design solutions of  Talakh horizon at field A to technical and economic conditions and well elevator design, as well as unprofitable development of Talakh horizon at field B under current technical and economic conditions, which is due to relatively high contribution of nonlinear effects of gas filtration in the bottomhole zone of the well on productivity and relatively low ratio of well productivity to the cost of well construction.

Conclusion. The results and recommendations presented in this paper are valuable for optimizing gas and oil extraction processes in Eastern Siberian fields.

1. The state-run Development Program for an integrated gas production, transportation and supply system in Eastern Siberia and the Far East.

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