An attempt by Russian oil firm Lukoil (LKOH.RS) to buy a large stake in Spanish oil company Repsol YPF SA (REP) is likely to be "history," Repsol Chairman Antonio Brufau said Thursday.

Brufau said his comment was a personal opinion, adding that large acquisitions are difficult in the current economic environment.

Brufau also said he hopes Repsol's current shareholder structure will be maintained this year, and troubled construction company Sacyr-Vallehermoso SA (SYV.MC) is likely to keep its 20% stake in Repsol in the medium or long term.

"My impression today is that Sacyr is not selling the stake, and this is what I have been told," Brufau said.

He added that Sacyr isn't facing the same financial difficulties it had three or four months ago

Company Web site: www.repsol.com

-By Bernd Radowitz, Dow Jones Newswires; +34-91-395-8125; djmadrid@dowjones.com