Maersk Oil has agreed to sell small stakes in the Scott and Telford fields in the North Sea and the Wytch Farm onshore field in England to new entrant RockRose Energy.
Scott and Telford are operated by Nexen through the Scott platform, which came onstream in 1993, about 188km northeast of Aberdeen in about 142m water depth.
RockRose was listed on the junior stock market in January this year. Andrew Austin, its company's executive chairman, was head of UK shale gas firm IGas, which sold out to Ineos last year.
Austin said in August the RockRose was working hard to acquire opportunities and that the firm had looked at more than 35 targets.
"We have submitted bids for a number of assets," he said at the time. "The market for assets continues to be illiquid. Many assets are offered for sale but there is often a lack of realism when it comes to value and few transactions are actually closing. "However, we believe that the continued downturn in the market and the Brexit vote is increasing the number of reluctant but forced sellers of assets."
Subject to the deal going through, its stakes in the fields would be: Wytch Farm (7.43%), Scott (5.16%) and Telford (2.36%) fields.