The Semakovskoye field is a partially offshore and a partially onshore gas field located in the Yamal-Nenets Autonomous Area in the West Siberia region of Russia.

The gas field is being developed by RusGazAlyans, a 50:50 joint-venture partnership between Gazprom and RusGazDobycha under a master agreement signed between both the parties at the St. Petersburg International Economic Forum in 2016.

Gazprom and RusGazDobycha reached a final investment decision (FID) on the Semakovskoye gas field development project in June 2020.

Semakovskoye is considered to be a large gas field as it is estimated to hold more than 320 billion cubic metres (bcm) of recoverable gas reserves.

The construction works on the project are expected to be started by the end of 2020 with the start of commercial production expected in 2022. 

Location and site details 

The Semakovskoye gas field is located in the Tazovskiy district of the Yamal-Nenets Autonomous Area in West Siberia, Russia, approximately 120km north-northeast of Yamburg.

The gas field lies partly in the waters of Taz Bay in the Kara Sea and partly on land in the Taz Peninsula. The project site is located close to the existing gas production, processing, and transportation near the city of Novy Urengoy.

Semakovskoye gas field phase one development plan 

The Semakovskoye field development will comprise a total of 19 wells. The first horizontal development well is being constructed with a vertical deviation of more than 2,000m. It will have a measured depth of 2,700m and a vertical depth of 830m.

A total of six development wells are planned to be completed by the first quarter of 2021. The first stage of field development will be located on the land portion of the field.

Classified as a transit field, the Semakovskoye field will undergo conceptual design for the selection of efficient alternatives to develop the reservoir located beneath the waters of the Taz Bay.

The field development will also involve a mooring complex, berthing structures, along with motorways and sites for production facilities. 

Semakovskoye field second and third phase development

The second and third development phases of the project will involve extended-reach drilling (ERD) wells with a vertical deviation of more than 3,500m as well as an offshore production complex for the field.

The offshore production complex will be constructed on an artificial island with a steel caisson base, which will be replaced by a reinforced concrete during the later phase of development.

Gas transmission

The gas extracted from the Semakovskoye field will be fed into Gazprom’s gas transmission system. 

Semakovskoye gas field background

The Semakovskoye gas field was discovered in 1971 in the South Kara Sea Area. The estimated gas reserves were increased to 47.9bcm in 2014.

The RusGazAlyans joint venture was formed between Gazprom and RusGazDobycha in 2016 in order to assess the development of three natural gas fields in the Yamal-Nenets Autonomous Area region that include Semakovskoye as well as the Parusovoye and Severo-Parusovoye gas deposits.

The three fields are estimated to hold a combined total of 450bcm of recoverable gas reserves.

Holding 320bcm of recoverable gas reserves, Semakovskoye is the biggest and the first among the three fields in the region to be developed by the joint venture.