Associated petroleum gas is an important raw material in the power and chemical industries. As an additional method of its utilization, it is worth considering use of a hydrocarbon mixture to generate power for the needs of oil fields, as well as injection into the reservoir.
Utilization of associated petroleum gas by re-injecting it into the reservoir is similar to water injection in that it allows for an increase of the reservoir recovery rate due to pressure build-up and oil viscosity reduction as the gas is dissolving in it.
When implementing this engineering solution for a “high-pressure gas compressor station – network – well – reservoir” system, difficulties arise when estimating: injection capacity of gas injection wells; conditions of hydrates formation in gas injection wells and gas pipelines; the effect of gas injected into the reservoir on oil production (displacement, breakthrough); optimization of well operation conditions with account of infrastructure limitations. In order to provide an all-in-one solution for these issues it is required to assess the process conditions of gas injection wells using a surface development model.
Currently, an approach covering the entire hydrocarbon production chain is applied; it calls for custom-made software allowing for integrated simulation of the reservoir and surface development parts, significant time costs and involvement of specialists from various expertise fields.
The article describes a process that enables operational monitoring and control of the gas injection system with regard to all the required planning horizons for the purpose of practical application at the oil and gas condensate field of LLC Taas-Yuryakh Neftegazodobycha using available software products.
A completed project is presented based on a set of tools including models of a high-pressure gas compressor station, injection network, wells and reservoir, making it possible to solve such important problems as determining the throughput capacity of the entire system, optimizing its operating conditions, identifying bottlenecks in the gas preparation and injection chain and mutual influence of the system components during operation.

ASSOCIATED PETROLEUM GAS, INJECTION, GAS CAP, RESERVOIR PRESSURE MAINTENANCE, GAS INJECTION WELL, GAS-OIL-WATER ZONE

A.V. Sviaschenko¹, e-mail: sviashchenkoav@tyngd.rosneft.ru;

V.M. Brinster², e-mail: vmbrinster@tnnc.rosneft.ru;

E.N. Ivanov^{1, 3}, e-mail: ivanoven@tyngd.rosneft.ru;

V.N. Yurchenko¹, e-mail: yurchenkovn@tyngd.rosneft.ru;

A.V. Mandrugin², e-mail: avmandrugin@tnnc.rosneft.ru


¹ LLC Taas-Yuryakh Neftegazodobycha (Lensk, Russia).
² Tyumen Petroleum Research Center LLC (Tyumen, Russia).
³ Irkutsk National Research Technical University (Irkutsk, Russia).

Sviaschenko AV, Brinster VM, Ivanov EN, Yurchenko VN, Mandrugin AV. Efficient monitoring of gas injection system at Srednebotuobinskoye field. Oil and Gas Territory [Territorija “NEFTEGAS”]. 2023; (11–12): 38–48. (In Russian)