28 February 2022

This gas-booster unit is intended to pumping associated gas incoming from the second oil separation stage of oil treatment plant and from terminal separation facility.



Pyakyakha oil and gas condensate field of the LUKOIL-West Siberia LLC is equipped with petroleum gas compressor station (CS) which ensures the gathering of APG from various production facilities of the field and its transportation.

As part of the CS, a low-pressure compressor unit (CU) from ENERGAS passed the 5-year milestone of operation. The unit, made based on screw oil-filled compressor, compresses associated gas incoming from the oil treatment plant (2nd separation stage) and terminal separation facility up to 0.79 MPa. Capacity of CU varies in the range of 101…2,160 m3 / h and it is controlled by two-tier regulation system.

The additional purification of APG (two-step removal of liquid fraction and solid particles) at the inlet to compressor is carried out by highly efficient coalescing filter-scrubber equipped with automatic drainage system.

The delivery line of CU is equipped with a heat exchanger (with a built-in separator and a condensate collector), which cools the compressed associated gas and removes the resulting condensate. As a result, the calculated temperature of the working medium set by the design requirements is provided.



To measure of compressed APG amount, unit is additionally equipped with gas metering subassembly with flow meter. Block-modular unit was designed to meet the extreme operating conditions (minimum air temperature is minus 56°C, average air temperature of the coldest five-day period is minus 46°C).

CU is fully automated, it is equipped with life support systems (heating, ventilation and lighting) and safety systems (fire detection, gas detection, alarm and fire fighting). Operation mode as part of the facility of oil-and-gas production complex is uninterrupted with scheduled shutdowns for maintenance.

The launch of a low-pressure CU was the first stage of the largest project in the production practice of ENERGAS. During 2017, eight more units were put into operation, which were included in the structure of the CS of the Pyakyakha field. This is:

- Booster unit to compress gas from condensate de-ethanization facility;
- Four CUs of medium pressure for compressing APG incoming from the 1st oil separation stage of OTP;
- Three reciprocating compressor units to transport petroleum gas to the complex gas treatment plant.



REFERENCE:

The Pyakyakha oil and gas condensate field, discovered in 1989, is one of the largest in the Yamal-Nenets Autonomous Area in terms of explored reserves and belongs to the most promising fields of Bolshekhetskaya Depression. Its development is the second hydrocarbon production project implemented by LUKOIL in the YNAA. The field operator is LUKOIL-West Siberia LLC.

The active phase of development and arrangement of the Pyakyakha OGCF began in 2014, and the field was put into commercial operation on October 25, 2016. A gas turbine power plant with a capacity of 36 MW, an oil treatment plant, a pumping station for a reservoir pressure maintenance system, condensate de-ethanization and condensate stabilization facilities, an acceptance point, a complex gas treatment plant and other production and infrastructure facilities operate here.

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