Storage

The Underground Gas Storage (UGS) facilities acquire gas surplus from the transmission grid in the summer season and provide additional gas reserves in the winter season. Currently, the company has eight gas storage facilities, whose total working capacity amounts to 1.83B m3. Assuming standard gas consumption, it ensures gas provision for 45 days. The development and expansion of the storage capacity is a key element of the activity of PGNiG Group. On one hand, it allows to increase the safety of supplies, on the other, it enables to remain competitive on the liberalized gas market. Until 2015, the company plans to increase its storage capacity to over 3B m3.

Storage facilities:

PGNiG owns nine underground gas storage (UGS) facilities located in two types of geological structures: in salt caverns (so-called CUGS) or partly depleted natural gas and crude oil reservoirs. Seven of these facilities are used to store high-methane gas: UGS Wierzchowice, UGS Husów, CUGS Mogilno, UGS Strachocina, UGS Swarzów, UGS Brzeźnica and two presently tested caverns in the natural gas commissioning phase at CUGS Kosakowo), and two are used to store nitrogen-rich gas (UGS Daszewo and UGS Bonikowo).

CUGS Mogilno – high-methane gas storage facility, working volume: 407.89M m3, located in the Kujawsko-Pomorskie Province, Mogileński District, communes of Mogilno and Rogowo. The storage is established in salt caverns, which allows for high capacity of gas pumping and offtake. Currently, CUGS Mogilno is expanded to reach the working volume of 800M m3.

UGS Husów – high-methane gas storage facility, working volume: 350M m3, located in the Podkarpackie Province, Łańcucki District, communes of Łańcut and Markowa. Currently, the facility is being expanded to reach the working volume of 500M m3.

UGS Wierzchowice – high-methane gas storage facility in a partially depleted nitrogen-rich gas reservoir, located in the Dolnośląskie Province, Milicz District, communes of Milicz and Krośnice. It is the largest underground gas storage facility in Poland. Working volume: 1 200M m3.

UGS Strachocina – high-methane gas storage facility, working volume: 360M m3, located in Podkarpackie Province, Sanocki District, communes of Sanok and Brzozów.

UGS Brzeźnica – high-methane gas storage facility, working volume: 65M m3, located in Podkarpackie Province, Dębicki District, commune of Dębica. Currently, the facility is being expanded to reach the working volume of 100M m3.

UGS Swarzów – high-methane gas storage facility, working volume: 90M m3, located in Małopolskie Province, Dąbrowski District, communes of Dąbrowa Tarnowska and Olesno. It is one of the oldest gas storage facilities in Poland.

UGS Bonikowo – storage facility for nitrogen-rich gas (Lw subgroup), working volume: 200M m3. Commissioned in 2010. As UGS Bonikowo is used for optimizing production of nitrogen-rich gas of the Lw subgroup in western Poland, this facility is not a storage facility as defined by the Power Energy Law. It is a storage facility of the exploration and production segment.

UGS Daszewo – storage facility for nitrogen-rich gas (Ls subgroup), working volume: 30M m3, established in a partially depleted crude oil and nitrogen-rich gas reservoir. As UGS Daszewo is used for optimizing production, this facility is not a storage facility as defined by the Power Energy Law. It is a storage facility of the exploration and production segment. Construction of another storage facility in salt caverns is in progress.

CUGS Kosakowo – high-methane gas storage facility under construction in the vicinity of Tricity. Final commissioning of the first two caverns of the facility took place in December 2013. In aggregate, their working volume amounts to 51.2M m3. It will be available for use in storage year 2014/2015. The facility is planned to reach the working volume of 250M m3. Completion of the CUGS Kosakowo construction investment is scheduled for 2021.

Short-term fluctuations of demand for natural gas are balanced with the use of CUGS Mogilno – a peak load storage facility in salt caverns. CUGS Kosakowo is planned to serve a similar function as CUGS Mogilno currently does. Balancing the fluctuating demand for natural gas in summer and winter seasons, performance of obligations under import contracts with a take or pay clause, ensuring the continuity and safety of gas supplies and performance of the loco brama sales agreements with clients are conducted with the use of the following volumes: UGS Wierzchowice, UGS Husów, UGS Strachocina, UGS Swarzów and UGS Brzeźnica. Moreover, UGS Wierzchowice, UGS Husów, CUGS Mogilno and UGS Strachocina are used to maintain obligatory reserve of natural gas by entrepreneurs engaged in international gas fuel trade, as imposed by the Act of 16 February 2007 on stocks of crude oil, petroleum products and natural gas, the principles of proceeding in circumstances of a threat to the fuel security of the State and disruption on the petroleum market.

Working volumes of UGS facilities in 2013 (in m³ millions)

  Working capacity [mln m³] Target capacity [mln m³] Completion date of the the expansion / construction
High-methane gas
Brzeźnica 65 100 2015
Husów* 350 500 2015
Kosakowo* 51,2 250 2021
Mogilno 407,9 800 2027
Strachocina 360 360 -
Swarzów 90 90 -
Wierzchowice 1200 1200 -
Nitrogen-rich gas
Bonikowo 200 200 -
Daszewo 30 30 -
* parameters and specification of UGS operation within the scope of new storage volumes are currently being tested and analyzed.