Associated gas compressor station at Yukyaun GTPP has passed a 15-year milestone of reliable operation
15 December 2021
The gas turbine power plant of the Yukyaun field of PJSC Surgutneftegas was put into operation in December 2006. GTPP comprises three power unit each of which is based on a NK-16ST turbine (KMPO). The installed capacity of the plant is 36 MW.
The GTPP-36 uses associated petroleum gas as a fuel. Thus, the provision of own electricity for the production and infrastructure facilities is combined with the rational utilization of APG and improvement of ecological situation at the field.
A significant contribution to the reliability and efficiency of power supply complex operation is made by the booster compressor station for associated gas. For 15 years, this BCS has been supplying turbines with fuel with the required parameters for purity, temperature, pressure and flow rate. BCS of the hangar type consists of three compressor units (CUs) which housed in separate building.
The units, supplied and commissioned by ENERGAS Company, are made based on screw oil-filled compressors. The unit capacity of the CU amounts to 9,000 m3 / h; gas flow is controlled by a special two-level regulation system.
Process equipment provides a necessary compression ratio: the APG inlet pressure is 0.4 MPa, the outlet pressure is 2.6 MPa. The purification of gas entering the compressors (two-step removal of liquid fractions and solid particles) is carried out by highly efficient coalescing filters-scrubbers with automatic drainage system.
The delivery line of each CU is equipped with a shell-and-tube heat exchanger (with a built-in separator and a condensate collector), which cools the compressed APG, removes the resulting condensate and maintains the calculated temperature of the gas fuel set by the turbines manufacturer and design requirements.
BCS is fully automated. Local control systems of compressor units are tied by a group regulation algorithm and integrated with the upper level of the facility's APCS. The joint ACS provides remote control of equipment, automatic protections and alarm; monitors the process parameters and gas pollution in the machine room of the BCS; handles the parameters of the workflows and emergency events; issues information to the operator panel.
Operation mode of gas booster units as part of the power plant is continuous, with scheduled shutdowns for maintenance.
REFERENCE:
The Yukyaun oil field (Tyan group) is located in the Surgut region of the Khanty-Mansi Autonomous Area. In terms of extractable reserves, it belongs to the category of medium, in operation since 2004. The construction of GTPP-36 was carried out here as part of the energy project of PJSC Surgutneftegas to create its own generating capacities.
The development of Yukyaun is carried out by Nizhnesortymskneft OGPD, the northernmost Oil and Gas Production Department of company. The peculiarities of the enterprise include oil production in difficult, unique conditions of the marshland. Today OGPD develops about a third of all Surgutneftegas fields. The main part of the reserves is low-permeability oil deposits.
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