Abstract:

The present study provides a calculation-based analysis of a gas processing plant (GPP) flowsheet designed for the treatment of natural gas from the Senomanian reservoir of the Komsomolskoye field. The feed gas is characterized by a high methane content, the absence of hydrogen sulfide, and a low concentration of carbon dioxide, which necessitates the adaptation of conventional gas processing schemes. Material and heat balances of the main process units were performed, and the operating parameters of gas dehydration, deethanization, and rectification of the C₂⁺ hydrocarbon fraction were determined. The results demonstrate that the amine-based acid gas removal unit is technologically inactive for the considered gas composition and can be excluded from a rational GPP scheme. A two-stage dehydration system employing diethylene glycol absorption followed by zeolite adsorption is substantiated, ensuring the required water dew point. The proposed flowsheet may serve as a basis for the design and optimization of gas processing plants handling low-sulfur natural gases.

Keywords: gas processing plant, Senomanian natural gas, material balance, gas dehydration, deethanization, rectification, process flowsheet.