June 27 (Reuters) - SM Energy ( SM ) said on Thursday it had

agreed to buy some assets of shale-focused producer XCL

Resources for about $2 billion from private equity firm EnCap

Investments.

Northern Oil and Gas ( NOG ) would also buy 20% of the oil

and gas assets of XCL for $510 million, resulting in a total

deal value of $2.55 billion.

(Reporting by Seher Dareen in Bengaluru; Editing by Sriraj

Kalluvila)