Located in waters o� the coast of Biscay, Gaviota is one of two underground natural gas storage facilities operating in Spain. Enagás is currently working on expanding this facility.

Impreso en papel ecológico y libre de cloro.

Underground natural gas storage facility

Gaviota

Enagás, S.A.Paseo de los Olmos, 19 • 28005 Madrid • +34 902 443 700

Gaviota storage facilityCtra. Bakio - Bermeo, km 33,8 • 48370 Bermeo (Biscay) • +34 946 187 070

www.enagas.es

The natural gas chain

ExtractionThe gas is extracted from the

gas � elds using drilling wells and extraction pipes

LiquefactionThe NG is liquefi ed (LNG) to

reduce its volume and make it easier to transport

NG transportThe natural gas (NG) is transported through gas pipelines

LNG transportationThe liquid natural gas

is transported in methane tankers to regasi� cation

plants

NG transportNatural gas is transported

through the high-pressure network

Distribution to end consumers

The liquid natural gas is transported in methane

tankers to regasi� cation

Regasi� cationThe liquid gas is returned

to its original gaseous state in regasi� cation

plants

Underground storage

Gas has been stored naturally for millions of years.

This process has been copied in Gaviota, with a depleted gas � eld being used as an underground storage facility.

A safe and environmentally-friendly facility that ful� ls a number of critical functions for the Gas System: smoothing out di� erences between summer and winter demand, retaining a cushion of strategic reserves, and, in short, contributing to guarantee the supply of natural gas.

Natural gas’s long journey from the gas � elds to the end consumer

A system that copies nature

More than 90 years of underground storage facilities

The storage facility is in a depleted gas � eld covering a surface area of 64 km2. It is located at a depth of 2,150 m in fractured limestone from the Upper Cretaceous.

The Gaviota storage facility is accessed from a platform anchored to the seabed with 20 pylons and connected by a gas pipeline to an onshore processing plant.

The Gaviota storage facility is located in the Bay of Biscay, 8 Km. off Cape Matxitxako, north east of Bermeo (Biscay).

Bermeo

Bilbao

Gaviota Platform

Gas processing plant

Bilbao

Poseidón

Marismas

Yela Castor

Serrablo

Gaviota

Palancares

main storage facilities in Europe

storage facilities in operation

storage facilities under development

There are 627 underground natural gas storage facilities worldwide, including one under Berlin’s city centre. The fi rst dates from 1915.

cuadriptico enagas_ingles.indd 1 13/12/10 10:52:19

Located in waters o� the coast of Biscay, Gaviota is one of two underground natural gas storage facilities operating in Spain. Enagás is currently working on expanding this facility.

Impreso en papel ecológico y libre de cloro.

Underground natural gas storage facility

Gaviota

Enagás, S.A.Paseo de los Olmos, 19 • 28005 Madrid • +34 902 443 700

Gaviota storage facilityCtra. Bakio - Bermeo, km 33,8 • 48370 Bermeo (Biscay) • +34 946 187 070

www.enagas.es

The natural gas chain

ExtractionThe gas is extracted from the

gas � elds using drilling wells and extraction pipes

LiquefactionThe NG is liquefi ed (LNG) to

reduce its volume and make it easier to transport

NG transportThe natural gas (NG) is transported through gas pipelines

LNG transportationThe liquid natural gas

is transported in methane tankers to regasi� cation

plants

NG transportNatural gas is transported

through the high-pressure network

Distribution to end consumers

The liquid natural gas is transported in methane

tankers to regasi� cation

Regasi� cationThe liquid gas is returned

to its original gaseous state in regasi� cation

plants

Underground storage

Gas has been stored naturally for millions of years.

This process has been copied in Gaviota, with a depleted gas � eld being used as an underground storage facility.

A safe and environmentally-friendly facility that ful� ls a number of critical functions for the Gas System: smoothing out di� erences between summer and winter demand, retaining a cushion of strategic reserves, and, in short, contributing to guarantee the supply of natural gas.

Natural gas’s long journey from the gas � elds to the end consumer

A system that copies nature

More than 90 years of underground storage facilities

The storage facility is in a depleted gas � eld covering a surface area of 64 km2. It is located at a depth of 2,150 m in fractured limestone from the Upper Cretaceous.

The Gaviota storage facility is accessed from a platform anchored to the seabed with 20 pylons and connected by a gas pipeline to an onshore processing plant.

The Gaviota storage facility is located in the Bay of Biscay, 8 Km. off Cape Matxitxako, north east of Bermeo (Biscay).

Bermeo

Bilbao

Gaviota Platform

Gas processing plant

Bilbao

Poseidón

Marismas

Yela Castor

Serrablo

Gaviota

Palancares

main storage facilities in Europe

storage facilities in operation

storage facilities under development

There are 627 underground natural gas storage facilities worldwide, including one under Berlin’s city centre. The fi rst dates from 1915.

cuadriptico enagas_ingles.indd 1 13/12/10 10:52:19

Located in waters o� the coast of Biscay, Gaviota is one of two underground natural gas storage facilities operating in Spain. Enagás is currently working on expanding this facility.

Impreso en papel ecológico y libre de cloro.

Underground natural gas storage facility

Gaviota

Enagás, S.A.Paseo de los Olmos, 19 • 28005 Madrid • +34 902 443 700

Gaviota storage facilityCtra. Bakio - Bermeo, km 33,8 • 48370 Bermeo (Biscay) • +34 946 187 070

www.enagas.es

The natural gas chain

ExtractionThe gas is extracted from the

gas � elds using drilling wells and extraction pipes

LiquefactionThe NG is liquefi ed (LNG) to

reduce its volume and make it easier to transport

NG transportThe natural gas (NG) is transported through gas pipelines

LNG transportationThe liquid natural gas

is transported in methane tankers to regasi� cation

plants

NG transportNatural gas is transported

through the high-pressure network

Distribution to end consumers

The liquid natural gas is transported in methane

tankers to regasi� cation

Regasi� cationThe liquid gas is returned

to its original gaseous state in regasi� cation

plants

Underground storage

Gas has been stored naturally for millions of years.

This process has been copied in Gaviota, with a depleted gas � eld being used as an underground storage facility.

A safe and environmentally-friendly facility that ful� ls a number of critical functions for the Gas System: smoothing out di� erences between summer and winter demand, retaining a cushion of strategic reserves, and, in short, contributing to guarantee the supply of natural gas.

Natural gas’s long journey from the gas � elds to the end consumer

A system that copies nature

More than 90 years of underground storage facilities

The storage facility is in a depleted gas � eld covering a surface area of 64 km2. It is located at a depth of 2,150 m in fractured limestone from the Upper Cretaceous.

The Gaviota storage facility is accessed from a platform anchored to the seabed with 20 pylons and connected by a gas pipeline to an onshore processing plant.

The Gaviota storage facility is located in the Bay of Biscay, 8 Km. off Cape Matxitxako, north east of Bermeo (Biscay).

Bermeo

Bilbao

Gaviota Platform

Gas processing plant

Bilbao

Poseidón

Marismas

Yela Castor

Serrablo

Gaviota

Palancares

main storage facilities in Europe

storage facilities in operation

storage facilities under development

There are 627 underground natural gas storage facilities worldwide, including one under Berlin’s city centre. The fi rst dates from 1915.

cuadriptico enagas_ingles.indd 1 13/12/10 10:52:19

The Gaviota underground storage facility Gaviota expansion project

Gas processing plantDistributed at various levels, this facility has the gas processing and compression equipment needed to perform two main processes at di� erent times of the year:

· Injection of natural gas into the underground storage facility. Approximately between April and October (period of lowest demand)

Natural gas from the basic gas pipeline network is compressed in the plant to a pressure of 70 bar. It is then transported through an undersea gas pipeline to the Gaviota platform. There, it is compressed to a pressure of between 150 and 180 bar, and then injected into the underground storage facility through wells.

· Output of natural gas from the underground storage facility to the basic gas pipeline network. Approximately between November and March (period of peak demand)

The amount of gas to be extracted depends on market demand. Due to the pressure and temperature in the gas � eld, extracted gas is saturated with water and condensate (heavy hydrocarbons). The water and condensate is separated from the natural gas at the processing plant and the Gaviota platform, modifying the gas’s composition for injection into the network of gas pipelines.

Injection/production wells

Five wells are used for injection and production operations. A sixth well is used to re-inject water produced during gas extraction back into the gas � eld.

Injection/production wells

Five wells are used for injection and production

Gas pipeli

ne to th

e

distrib

ution net

work

Cape Matxitxako

Gaviota Underground Storage

8 km

105

m

2.500 m

Gaviota Underground Storage

Gaviota Underground Storage

105

m

Pipeline connecting the plant and platform

16” undersea pipe, 7,996 m of which is submerged and 780 m on land. This pipe transports the natural gas from the plant to the platform during injection periods. During extraction periods, it is used to transport the gas and condensate in the opposite direction.

Gaviota platformComprises a tubular steel support structure designed to withstand the weight of a superstructure comprising: the drilling, compression and processing facilities, personnel quarters, helipad, and other installations.

Gas pipeli

ne to th

e

Spain imports practically all the gas it consumes, and its storage capacity is limited; approximately 10% of that of neighbouring European states. New storage facilities are required for the future.Enagás is constantly investigating all possibilities for underground natural gas storage in Spain.

History of the storage facility

Increasing storage capacity is a key factor for guaranteeing supply

Enagás is the Technical System Operator for the gas system and leader in high-pressure transportation, regasi� cation and storage of natural gas. It has almost 10,000 Km. of gas pipelines, three regasi� cation plants (Barcelona, Cartagena and Huelva) and two underground storage facilities (Gaviota in Biscay and Serrablo in Huesca).

The company is a major player in the Basque Country after it acquired the Gaviota storage facility in 2010 and took a 40% stake in the regasi� cation plant of Bahía Biscay Gas (BBG) in the same year.

As well as expanding these two facilities, Enagás is also carrying out two major projects: the El Musel regasifi cation plant in Gijón, and the Yela underground storage facility in Guadalajara.

Gaviota post-expansion

Useful gas volume will double from 779 MNm3 to 1,600 MNm3.

Emission network capacity will rise from 5.7 MNm3/day to 14.2 MNm3/day.

Capacity to inject into the storage facility will increase from 4.5 MNm3/day to 9.6 MNm3/day.

Under the name ALGA 1600, this project aims to expand Gaviota’s useful gas capacity to 1,600 m3; double its current volume.

To achieve this objective and to boost the nominal natural gas extraction and injection flows, the project requires the construction of new facilities and several modifications to existing installations. A new 20” undersea gas pipeline will

be laid for natural gas extraction and injection, and four new wells will be drilled.

The existing onshore gas processing and compression system will be expanded, while the Bermeo-Lemona gas pipeline will be duplicated.

The Gaviota expansion project has a budget of €700 million and will lead to the creation of new jobs and will generally revitalise the local economy.

Vizcaya B and C coastal exploration

permits awarded

1976First exploratory

survey and discovery of the Gaviota

natural gas � eld

1980Feasibility studies

con� rming the possibility of commercial exploitation

1982/83Gaviota I and II

operating concessions

awarded until 2013

1983Start of construction of the platform and

onshore installations. Laying on the

pipelines joining the two facilities

1984Commencement

of drilling of � rst well

1985First commercial

output of gas

1986Gaviota opened as

underground storage facility after production

ceases and necessary adaptation is complete

1994Enagás acquires

Gaviota

2010Start of ALGA 1600 extension project

2011

cuadriptico enagas_ingles.indd 2 13/12/10 10:52:33

The Gaviota underground storage facility Gaviota expansion project

Gas processing plantDistributed at various levels, this facility has the gas processing and compression equipment needed to perform two main processes at di� erent times of the year:

· Injection of natural gas into the underground storage facility. Approximately between April and October (period of lowest demand)

Natural gas from the basic gas pipeline network is compressed in the plant to a pressure of 70 bar. It is then transported through an undersea gas pipeline to the Gaviota platform. There, it is compressed to a pressure of between 150 and 180 bar, and then injected into the underground storage facility through wells.

· Output of natural gas from the underground storage facility to the basic gas pipeline network. Approximately between November and March (period of peak demand)

The amount of gas to be extracted depends on market demand. Due to the pressure and temperature in the gas � eld, extracted gas is saturated with water and condensate (heavy hydrocarbons). The water and condensate is separated from the natural gas at the processing plant and the Gaviota platform, modifying the gas’s composition for injection into the network of gas pipelines.

Injection/production wells

Five wells are used for injection and production operations. A sixth well is used to re-inject water produced during gas extraction back into the gas � eld.

Injection/production wells

Five wells are used for injection and production

Gas pipeli

ne to th

e

distrib

ution net

work

Cape Matxitxako

Gaviota Underground Storage

8 km

105

m

2.500 m

Gaviota Underground Storage

Gaviota Underground Storage

105

m

Pipeline connecting the plant and platform

16” undersea pipe, 7,996 m of which is submerged and 780 m on land. This pipe transports the natural gas from the plant to the platform during injection periods. During extraction periods, it is used to transport the gas and condensate in the opposite direction.

Gaviota platformComprises a tubular steel support structure designed to withstand the weight of a superstructure comprising: the drilling, compression and processing facilities, personnel quarters, helipad, and other installations.

Gas pipeli

ne to th

e

Spain imports practically all the gas it consumes, and its storage capacity is limited; approximately 10% of that of neighbouring European states. New storage facilities are required for the future.Enagás is constantly investigating all possibilities for underground natural gas storage in Spain.

History of the storage facility

Increasing storage capacity is a key factor for guaranteeing supply

Enagás is the Technical System Operator for the gas system and leader in high-pressure transportation, regasi� cation and storage of natural gas. It has almost 10,000 Km. of gas pipelines, three regasi� cation plants (Barcelona, Cartagena and Huelva) and two underground storage facilities (Gaviota in Biscay and Serrablo in Huesca).

The company is a major player in the Basque Country after it acquired the Gaviota storage facility in 2010 and took a 40% stake in the regasi� cation plant of Bahía Biscay Gas (BBG) in the same year.

As well as expanding these two facilities, Enagás is also carrying out two major projects: the El Musel regasifi cation plant in Gijón, and the Yela underground storage facility in Guadalajara.

Gaviota post-expansion

Useful gas volume will double from 779 MNm3 to 1,600 MNm3.

Emission network capacity will rise from 5.7 MNm3/day to 14.2 MNm3/day.

Capacity to inject into the storage facility will increase from 4.5 MNm3/day to 9.6 MNm3/day.

Under the name ALGA 1600, this project aims to expand Gaviota’s useful gas capacity to 1,600 m3; double its current volume.

To achieve this objective and to boost the nominal natural gas extraction and injection flows, the project requires the construction of new facilities and several modifications to existing installations. A new 20” undersea gas pipeline will

be laid for natural gas extraction and injection, and four new wells will be drilled.

The existing onshore gas processing and compression system will be expanded, while the Bermeo-Lemona gas pipeline will be duplicated.

The Gaviota expansion project has a budget of €700 million and will lead to the creation of new jobs and will generally revitalise the local economy.

Vizcaya B and C coastal exploration

permits awarded

1976First exploratory

survey and discovery of the Gaviota

natural gas � eld

1980Feasibility studies

con� rming the possibility of commercial exploitation

1982/83Gaviota I and II

operating concessions

awarded until 2013

1983Start of construction of the platform and

onshore installations. Laying on the

pipelines joining the two facilities

1984Commencement

of drilling of � rst well

1985First commercial

output of gas

1986Gaviota opened as

underground storage facility after production

ceases and necessary adaptation is complete

1994Enagás acquires

Gaviota

2010Start of ALGA 1600 extension project

2011

cuadriptico enagas_ingles.indd 2 13/12/10 10:52:33

The Gaviota underground storage facility Gaviota expansion project

Gas processing plantDistributed at various levels, this facility has the gas processing and compression equipment needed to perform two main processes at di� erent times of the year:

· Injection of natural gas into the underground storage facility. Approximately between April and October (period of lowest demand)

Natural gas from the basic gas pipeline network is compressed in the plant to a pressure of 70 bar. It is then transported through an undersea gas pipeline to the Gaviota platform. There, it is compressed to a pressure of between 150 and 180 bar, and then injected into the underground storage facility through wells.

· Output of natural gas from the underground storage facility to the basic gas pipeline network. Approximately between November and March (period of peak demand)

The amount of gas to be extracted depends on market demand. Due to the pressure and temperature in the gas � eld, extracted gas is saturated with water and condensate (heavy hydrocarbons). The water and condensate is separated from the natural gas at the processing plant and the Gaviota platform, modifying the gas’s composition for injection into the network of gas pipelines.

Injection/production wells

Five wells are used for injection and production operations. A sixth well is used to re-inject water produced during gas extraction back into the gas � eld.

Injection/production wells

Five wells are used for injection and production

Gas pipeli

ne to th

e

distrib

ution net

work

Cape Matxitxako

Gaviota Underground Storage

8 km

105

m

2.500 m

Gaviota Underground Storage

Gaviota Underground Storage

105

m

Pipeline connecting the plant and platform

16” undersea pipe, 7,996 m of which is submerged and 780 m on land. This pipe transports the natural gas from the plant to the platform during injection periods. During extraction periods, it is used to transport the gas and condensate in the opposite direction.

Gaviota platformComprises a tubular steel support structure designed to withstand the weight of a superstructure comprising: the drilling, compression and processing facilities, personnel quarters, helipad, and other installations.

Gas pipeli

ne to th

e

Spain imports practically all the gas it consumes, and its storage capacity is limited; approximately 10% of that of neighbouring European states. New storage facilities are required for the future.Enagás is constantly investigating all possibilities for underground natural gas storage in Spain.

History of the storage facility

Increasing storage capacity is a key factor for guaranteeing supply

Enagás is the Technical System Operator for the gas system and leader in high-pressure transportation, regasi� cation and storage of natural gas. It has almost 10,000 Km. of gas pipelines, three regasi� cation plants (Barcelona, Cartagena and Huelva) and two underground storage facilities (Gaviota in Biscay and Serrablo in Huesca).

The company is a major player in the Basque Country after it acquired the Gaviota storage facility in 2010 and took a 40% stake in the regasi� cation plant of Bahía Biscay Gas (BBG) in the same year.

As well as expanding these two facilities, Enagás is also carrying out two major projects: the El Musel regasifi cation plant in Gijón, and the Yela underground storage facility in Guadalajara.

Gaviota post-expansion

Useful gas volume will double from 779 MNm3 to 1,600 MNm3.

Emission network capacity will rise from 5.7 MNm3/day to 14.2 MNm3/day.

Capacity to inject into the storage facility will increase from 4.5 MNm3/day to 9.6 MNm3/day.

Under the name ALGA 1600, this project aims to expand Gaviota’s useful gas capacity to 1,600 m3; double its current volume.

To achieve this objective and to boost the nominal natural gas extraction and injection flows, the project requires the construction of new facilities and several modifications to existing installations. A new 20” undersea gas pipeline will

be laid for natural gas extraction and injection, and four new wells will be drilled.

The existing onshore gas processing and compression system will be expanded, while the Bermeo-Lemona gas pipeline will be duplicated.

The Gaviota expansion project has a budget of €700 million and will lead to the creation of new jobs and will generally revitalise the local economy.

Vizcaya B and C coastal exploration

permits awarded

1976First exploratory

survey and discovery of the Gaviota

natural gas � eld

1980Feasibility studies

con� rming the possibility of commercial exploitation

1982/83Gaviota I and II

operating concessions

awarded until 2013

1983Start of construction of the platform and

onshore installations. Laying on the

pipelines joining the two facilities

1984Commencement

of drilling of � rst well

1985First commercial

output of gas

1986Gaviota opened as

underground storage facility after production

ceases and necessary adaptation is complete

1994Enagás acquires

Gaviota

2010Start of ALGA 1600 extension project

2011

cuadriptico enagas_ingles.indd 2 13/12/10 10:52:33

Located in waters o� the coast of Biscay, Gaviota is one of two underground natural gas storage facilities operating in Spain. Enagás is currently working on expanding this facility.

Impreso en papel ecológico y libre de cloro.

Underground natural gas storage facility

Gaviota

Enagás, S.A.Paseo de los Olmos, 19 • 28005 Madrid • +34 902 443 700

Gaviota storage facilityCtra. Bakio - Bermeo, km 33,8 • 48370 Bermeo (Biscay) • +34 946 187 070

www.enagas.es

The natural gas chain

ExtractionThe gas is extracted from the

gas � elds using drilling wells and extraction pipes

LiquefactionThe NG is liquefi ed (LNG) to

reduce its volume and make it easier to transport

NG transportThe natural gas (NG) is transported through gas pipelines

LNG transportationThe liquid natural gas

is transported in methane tankers to regasi� cation

plants

NG transportNatural gas is transported

through the high-pressure network

Distribution to end consumers

The liquid natural gas is transported in methane

tankers to regasi� cation

Regasi� cationThe liquid gas is returned

to its original gaseous state in regasi� cation

plants

Underground storage

Gas has been stored naturally for millions of years.

This process has been copied in Gaviota, with a depleted gas � eld being used as an underground storage facility.

A safe and environmentally-friendly facility that ful� ls a number of critical functions for the Gas System: smoothing out di� erences between summer and winter demand, retaining a cushion of strategic reserves, and, in short, contributing to guarantee the supply of natural gas.

Natural gas’s long journey from the gas � elds to the end consumer

A system that copies nature

More than 90 years of underground storage facilities

The storage facility is in a depleted gas � eld covering a surface area of 64 km2. It is located at a depth of 2,150 m in fractured limestone from the Upper Cretaceous.

The Gaviota storage facility is accessed from a platform anchored to the seabed with 20 pylons and connected by a gas pipeline to an onshore processing plant.

The Gaviota storage facility is located in the Bay of Biscay, 8 Km. off Cape Matxitxako, north east of Bermeo (Biscay).

Bermeo

Bilbao

Gaviota Platform

Gas processing plant

Bilbao

Poseidón

Marismas

Yela Castor

Serrablo

Gaviota

Palancares

main storage facilities in Europe

storage facilities in operation

storage facilities under development

There are 627 underground natural gas storage facilities worldwide, including one under Berlin’s city centre. The fi rst dates from 1915.

cuadriptico enagas_ingles.indd 1 13/12/10 10:52:19