Srednevilyuyskoye Gas Condensate Field-Yakutsk Gas Pipeline

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Srednevilyuyskoye Gas Condensate Field - Yakutsk Gas Pipeline (Russian: МГ Средневилюйское газоконденсатное месторождение – Якутск; МГ СВ ГКМ-Мастах-Якутск) is an operating gas pipeline network in Russia.

The pipeline network is sometimes referred to as the Kysyl-Syr - Mastakh - Berge - Yakutsk Gas Pipeline (Russian: МГ Кысыл-Сыр – Мастах – Берге – Якутск; МГ Кысыл-Сыр – Якутск). This pipeline network also includes the Phase I pipeline with a different route, referred to as the Taas-Tumus - Yakutsk Gas Pipeline (Russian: МГП Таас-Тумус - Якутск), and sometimes referred to as the Ust Vilyuiskoe - Yakutsk Gas Pipeline.

An expansion project from Kysyl-Syr to Mastakh is under construction (Russian: МГ Кысыл-Сыр – Мастах).

Location

Phase I

The first phase is referred to as the Taas-Tumus - Yakutsk Gas Pipeline. It runs from Taas-Tumus (Tas-Tumus, Sakha Republic, Russia) to Yakutsk, Russia.

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Phase II

The second portion of the pipeline consists of three parallel segments that run from Mastakhskoye gas condensate field (Mastakh) to Yakutsk.

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Phase III

The third portion of the pipeline consists of two parallel segments running from Srednevilyuyskoye gas condensate field, near the town of Kysyl-Syr in Vilyuysky District to Mastakh.

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Kysyl-Syr - Mastakh Expansion

This project is proposed to be an 84-kilometer pipeline (third segment) running from Srednevilyuyskoye gas condensate field, near the town of Kysyl-Syr in Vilyuysky District to to Mastakh.

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Project Details

• Operator: Sakhatransneftegaz JSC
• Owner: Sakhatransneftegaz JSC
• Parent company: Republic of Sakha (84.43%), RIK Plus JSC (15.57%)
• Capacity: 1.50 bcm/y (4.2 mill.Sm3/day)
• Length: 2,693 km
  • Phase I: 200 km
  • Phase II: 1,146 km (3 segments, each 382 km)
  • Phase III: 168 km (2 segments, each 84 km)
• Diameter: 529 mm; 720 mm
• Status: Operating
• Start year:
  • Phase I: 1968, 1978
  • Phase II: 1973, 1984, 2014
  • Phase III: 1986, 1988
• Cost:
• Financing:
• Associated infrastructure: Srednevilyuyskoye Gas and Condensate field, Mastakhskoye Gas and Condensate Field

Kysyl-Syr - Mastakh III Gas Pipeline

• Operator: Sakhatransneftegaz JSC
• Owner: Sakhatransneftegaz JSC
• Parent company: Republic of Sakha (84.43%), RIK Plus JSC (15.57%)
• Capacity: 2.9 bcm/year (8 mill.Sm3/day)
• Length: 84 km
• Diameter: 700 mm
• Status: Construction
• Proposal year: 2020
• Construction year: 2022
• Start year: 2024
• Cost: RUB 8.57 billion
• Financing: Sakhatransneftegaz JSC; partially financed by the federal government (RUB 2.8 billion)
• Associated infrastructure: Srednevilyuyskoye Gas and Condensate Field, Mastakhskoye Gas and Condensate Field

Background

The Srednevilyuyskoye Gas Condensate Field - Yakutsk Gas Pipeline was constructed in three phases.

Phase I: Taas-Tumus - Yakutsk I and II Gas Pipelines

The first phase is referred to as the Taas-Tumus - Yakutsk Gas Pipeline (Russian: МГП Таас-Тумус - Якутск) and is also sometimes referred to as the Ust Vilyuiskoe - Yakutsk gas pipeline. It runs from Taas-Tumus (Tas-Tumus, Sakha Republic, Russia) to Yakutsk, Russia (Таас-Тумус – Якутск) and has two parallel segments. It was the first piece of the pipeline to become operational in 1967, 192 km in length. The source of the segment was originally the Ust Vilyuiskoe gas field (Усть-Вилюйское газоконденсатное месторождение; a part of the Таас-Тумусского газоконденсатного месторождения) which was exhausted in 1993. The pipeline has been functioning poorly as it is nearing the end of its projected life. Since the beginning of the operation of the gas transmission system, 189 accidents have occurred, including 5 major ones, as a result of which gas consumption restrictions were imposed on industrial enterprises in the region. A further planned increase in gas consumption in the Yakutsk industrial hub necessitated the construction of a third line 382 km long on the Mastakh - Berge - Yakutsk section.

Following completion of the Kysyl-Syr-Mastakh expansion project in 2024, this oldest section of the pipeline will be renovated. According to Sakhatransneftegaz, Taas-Tumus - Yakutsk I Gas Pipeline was built in 1968 and is 200 km long, and Taas-Tumus - Yakutsk II Gas Pipeline (201.9 km) was completed in 1978.

Phase II: Mastakh-Berge I and II Gas Pipelines, Mastakh-Yakutsk III Gas Pipeline

The second portion of the pipeline consists of three parallel segments that run from Mastakh to Berge, each around 184 km long. In Berge, two segments with the diameter of 529 mm connect to Taas-Tumus - Yakutsk I and II Gas Pipelines and run to Yakutsk. The third segment with the diameter of 720 mm was commissioned in 2014 runs parallel to the other two segments and ends in Yakutsk. The total length of the third segment (Mastakh-Berge-Yakutsk Gas Pipeline) is 386 km.

Phase III: Kysyl-Syr - Mastakh I and II Gas Pipelines

The third portion of the pipeline consists of two parallel segments running from Kysyl-Syr to Mastakh (Russian: МГ Кысыл-Сыр – Мастах), each 84 kilometers long. The first segment was built in 1986 and the second segment was completed in 1988. The pipe diameter of two of these segments is 529 mm.

Together, Phase II and Phase III of the pipeline are 466 km long and are jointly referred to as the Kysyl-Syr-Mastakh-Berge-Yakutsk Gas Pipeline (МГ Кысыл-Сыр – Мастах – Берге – Якутск).

In April 2021, replacement and renovation of segments of the pipeline 15 km length in total was being planned, as well as upgrades of gas distribution stations and gas control points.

Kysyl-Syr - Mastakh III Gas Pipeline

An expansion project is proposed, referred to as the Kysyl-Syr - Mastakh expansion project (Russian: МГ "Кысыл-Сыр-84 км"). This project would be an 84-kilometer pipeline from Kysyl-Syr to Mastakh, which would add an additional segment identical to the two operating segments of Phase III from Kysyl-Syr to Mastakh. The diameter is most likely to be 720 mm, identical to the third segment of Phase II, as it would connect to it.

The abnormally cold winter of 2020-2021, when the temperatures maintained below -50 ° C for a long period of time, showed that the pipeline section from the Srednevilyuiskoye gas condensate field to the village Mastakh was working at the limit of permitted pressures. The pipeline was working at the throughput capacity of 9,928 tonnes per cubic meter, while its maximum capacity is 9400 tonnes per cubic meter.

According to a statement by Alexey Kolodeznikov, General Director of Sakhatransneftegaz JSC, in April 2021, in order to provide the residents with uninterrupted and safe supply of gas, it is vital to construct the remainder of the third segment (phase) of the pipeline from Kysyl-Syr to Mastakh. The operating pipeline has been running over its capacity. As of April 2021, construction of the remaining segment was expected to start in 2021. In October 2021, it was reported that construction was expected to take place from 2022 until 2024. Construction of the pipeline started in April 2022.

By the end of 2022, 38 kilometers of the pipeline had been built. Construction of 1 kilometer of the pipeline costs around RUB 100,000-110,000 million, and the total cost of the project has increased from RUB 5.4 billion to RUB 8.57 billion. As of July 2023, 71 kilometers of the pipeline have been built. The pipeline is expected to be commissioned in 2024.

In April 2024, the construction of the pipeline was mentioned as ongoing by the Minister of Industry and Trade of the Republic of Sakha. In May 2024, it was reported that the construction was almost complete.

Accidents

The Taas-Tumus - Yakutsk Gas Pipeline (Phase I) pipeline has been functioning poorly nearing the end of its life. Since the beginning of the operation of the gas transmission system, 189 accidents have occurred, including 5 major ones, as a result of which gas consumption restrictions were imposed on industrial enterprises in the region.

On December 22, 2018, a forest fire was discovered in the Namsky District of Yakutia. Subsequently, it turned out that the cause of the fire was the explosion of the Srednevilyuyskoye gas condensate field-Mastakh-Berge-Yakutsk gas pipeline. The fire destroyed more than 129 m³ of timber. The cause of the explosion was a crack and resulting corrosion in the main pipe of the gas pipeline. The pipes have been in operation for 51 years, with a maximum period of 30 years. On February 26, 2019, based on the results of the consideration of the criminal case against Sakhatransneftegaz, they were ordered to pay a fine in the amount of 500 thousand rubles (USD $6,800). The company Sakhatransneftegaz that owns the pipeline compensated the damage in full.