Natural gas is discovered in Vendsyssel, on the northern tip of Jutland, when drilling for water.
Fish exporter Rasmus Clausen extracts natural gas from his own property; the first gas well in Denmark. Full-scale production commences at the same time.
Prime Minister Thorvald Stauning awards the first Sole Concession to the entire Danish subsurface to American engineer Frederick F. Ravlin.
The Concession, now belonging to Esso, is given up. A German company applies for a concession to a limited area of Denmark.
A.P. Møller is awarded a 50-year Sole Concession to explore and produce in Denmark. Dansk Undergrunds Consortium (DUC) is founded. There were no great expectations that Denmark would become an oil-producing country.
DUC goes offshore and performs its first exploration drilling in the North Sea. The year after oil is found in the Kraka field.
Danish-German negotiations about delineation of borders in the North Sea end. The matter has been heard by the International Court of Justice.
The Danish oil adventure truly kicks off. Production from the Dan field commences.
A.P. Møller's exploration period is extended by two years.
The Arab oil embargo on the West leads to the first Danish oil crisis.
The government and A.P. Møller enter an agreement, which means e.g. that DONG, the Danish national oil and gas company, gets pre-emption rights to the gas.
The Shah of Iran flees his country and the consequent turmoil in Middel East oil production leads to the second Danish oil crisis.
The government and A.P. Møller renegotiate the terms and conditions of the Concession. The changes include that A.P. Møller is to give up parts of the Sole Concession area.
The Danish Parliament adopts a hydrocarbon tax.
Launch of 1st Licensing Round. Interested oil companies can make a bid for one or more of the blocks into which the subsurface has been divided. A total of 15 licences are awarded.
2nd Licensing Round. A total of nine licences are awarded.
3rd Licensing Round. A total of 12 licences are awarded.
Denmark is self-sufficient in oil.
4th Licensing Round. A total of nine licences are awarded.
Denmark is self-sufficient in energy: Danish oil and gas production now exceeds total Danish energy consumption. Denmark is a net exporter of energy.
Fifth Licensing Round. A total of 17 licences are awarded.
New agreement between the government and A.P. Møller, resulting in higher economic returns for the Danish state.
Nordsøfonden is established by law. Its role is to take part in all recent licences on behalf of the state.
6th Licensing Round. A total of 14 licences are awarded.
Nordsøfonden enters DUC on behalf of the state, with a 20% share.
Service check of the economic framework conditions for hydrocarbon recovery in Denmark. The service check results in a standardisation of tax rules for all licences.
7th Licensing Round. A total of 16 licences are awarded.
New agreement between the government and the Concessionaire on behalf of DUC about improved framework conditions for oil and gas production in the Danish North Sea.
The french company Total S.A acquires all of Maersk's oil and gas activities, including the Sole Concession area and the role as operator in DUC.