16 August 2016

Since 2008, on the site of the Central Production Facility of Alekhinskoye oil field (Surgutneftegas OJSC) operates a compressor station of low separation stages. The basis of CSLS consists of four compressor units (CU) of low pressure, supplied and commissioned by the company ENERGAS.



CUs of type EGSI-S-650/1500WA with a capacity of 7,000 m3 / h perform purification, compression and injection of associated petroleum gas into the transporting pipeline under pressure of 1.7 MPa.

Until recently, the only source of low-pressure APG for the CSLS was Oil Processing and Pumping Shop. To collect and compress gas from other facilities, at the station there was implemented upgrade of compressor units.

Within the framework of the project, the system of input gas pipelines was upgraded with the installation of additional switching valves and pressure sensors, as well as the automated control system of CU and ACS of upper level were improved.

After upgrade, the capacity of the CU is regulated by the suction line, and the gas is supplied from the pipeline with a higher pressure. The choice of the source of gas is performed by the operator of CU in the operator room of the compressor station on the monitor of the operator's WKS.

The project has been implemented by ServicENERGAS LLC (part of the companies group ENERGAS). Technical specialists carried out the following:

• Development and delivery of new software;
• Supervisory control over the implementation of upgrade and assembling;
• Starting-up and adjustment works;
• Individual testing in operation mode.

REFERENCE. Alekhinskoe field – one of the oldest, put into development in 1985. The uniqueness of the field lies in the fact that it has four oil-bearing formations, whereas in other developments it is usually one or two. The peak of production was in 1991, when raised almost 2 million tons of oil from the depths.

Nizhnesortymskneft OGPD – the most northern Oil and Gas Production Department of Surgutneftegas OJSC – was established in 1989. The peculiarities of the enterprise include oil production in difficult, unique conditions of the marshland. Today, OGPD is developing 18 fields, which is one third of all Surgutneftegas fields. The main part of the reserves is low-permeability oil deposits.

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