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Vertical axis in chart corresponds to 000s of bbls of oil equivalent per day.

Oil -  fossil oil from on and offshore reservoirs, including tight sands/shales; and liquids extracted from gas.

Gas - sales gas from on and offshore reservoirs, including tight sands/shales and coal beds.

Full breakdowns are available in datafiles.

Vertical axis in chart corresponds to number of wells spudded in year including stand-alone sidetracks.

Wells in chart include those drilled in exploratory and development categories for oil and gas, but excluding CBM.

Full breakdowns are available in datafiles.

Exploration and Production

Early history

Offshore - In 1970 a consortium led by Shell discovered the Amposta oil field with only the second well drilled in the Mediterranean Sea. It was the first oil discovery in the Valencia Trough beneath the Ebro Delta. The structure is a tilted horst with an unconformity at the base of the Cenozoic section resting on fractured Mesozoic carbonates from which heavy (17 API) oil flowed. It was brought onstream in 1973.

This encouraged other companies to acquire acreage and several discoveries were made with lighter oils including Tarraco by Shell in 1973, onstream in 1977. This period culminated in the discovery of the largest field in the region, Casablanca, by CNWL in 1975, 50kms east of the Amposta field in water depths up to 500m. It came onstream in 1978.

In development

Modern history

In development

For recent events see News Briefs.

Regions

In development

Oil and gas forecasts

In development

Southern Europe

Spain

SPAIN: SEDIMENTARY BASINS

Globalshift.co.uk (source: PePeEfe)

E and P

News Briefs

Spain Datafiles

Excel files - low-cost histories and forecasts of production and wells in any category for all countries and regions