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Oil and Gas

Arntzen de Besche is a leading law firm, specialising in the oil and gas sector, both in Norway and around the world. With global industry knowledge and experience, we contribute to targeted value creation at oil companies, contractors and public authorities.

Arntzen de Besche has Norway’s strongest team of lawyers within the oil and gas sector. We draw on more than 40 years’ of experience cooperating with oil companies, contractors and petroleum authorities, and we handle all legal matters related to the oil and gas sectors. Clients include the biggest international oil companies, newcomers on the Norwegian oil and gas scene, some of the largest power producers in the Nordic countries and in Northern Europe as well as Norwegian and foreign authorities and regulators. 

The Chambers & Partners rating agency ranks us as leading in Norway. Legal 500 defines us as a first-class firm. Arntzen de Besche was voted the best company in the oil and gas sector in a survey of law firms conducted by the Norwegian financial newspaper, Finansavisen.

Skilled senior lawyers with industrial and international experience

All our senior lawyers and partners have employment experience from the oil industry or petroleum authorities, and we work closely with business organisations in oil companies and contractors to provide effective and targeted advisory services, in collaboration with company management and staff.

Arntzen de Besche senior lawyers have litigated some of the most important disputes on the Norwegian continental shelf.

Arntzen de Besche is involved in oil and gas activities in oil-producing countries around the world. Our oil and energy team has assisted in the international operations of Norwegian companies and has advised national authorities in over 25 countries in Europe, Asia, Africa, the Middle East and South America. Our advisory services to governments in oil-producing countries include petroleum and environmental legislation, production sharing agreements, licensing rounds, international law, maritime law and treaty issues. Read more about our international oil and gas activities.  

We also have broad international experience in transparency requirements and corruption issues.

Legal issues in the oil and gas sector are often large, complex and business-critical. We can assist you with expert and effective legal teams, tailored to your requirements.

We assist on all legal matters related to oil and gas

Our advisory services are particularly geared towards:



Gas sales and transport

Assistance to governmental authorities

Petroleum tax

Settlement of disputes (arbitration and ordinary court proceedings) – including:

We are extensively involved in carbon capture and other environmental issues related to oil and energy activities. 

Related cases


Partners and lawyers: Oil and Gas