London-listed oil and gas producer Enquest is discussing a possible takeover of rival North Sea firm Serica Energy.
The news was confirmed by Serica today in a stock exchange announcement in which the company said its board believes "there are substantial potential benefits" to merging with Enquest.
These include "increasing scale and diversification, unlocking significant synergies and providing a stronger platform for further growth", Serica said.
The firm added that any transaction would probably be structured as an all-share offer by Enquest by way of a reverse takeover.
The two companies are equally matched in terms of production. Enquest expects to produce 40,000-45,000 b/d of oil equivalent (boe/d) this year, while Serica's guidance is around 40,000 boe/d.
Enquest's portfolio is dominated by UK North Sea assets, although it does have a presence in Malaysia and earlier this year agreed a deal to buy London-listed Harbour Energy's business in Vietnam. Serica operates in the UK North Sea only and its production is a broadly even mix of oil and gas.
Consolidation among oil and gas firms in the North Sea is accelerating as operators seek economies of scale in the mature basin. Only today, North Sea and Middle East-focused independent DNO announced a $450mn deal to buy Norwegian rival Sval Energi.
Other recent deals include Harbour Energy buying most of German firm Wintershall Dea's assets and UK independent Ithaca Energy's takeover of Italian firm Eni's UK assets, both of which completed last year.
Tax rises and ongoing production decline are among the factors driving consolidation in the UK sector of the North Sea.

