UPDATE 7-Lukoil closes on deal on Repsol buy-source

* La Caixa in talks with Lukoil on Repsol stake sale

* Lukoil buy of Repsol may depend on Sacyr, financing

* Lukoil reported close to deal with Sacyr at 28 euros/shr (Adds quotes from source saying deal close, issues pending)

By Carlos Ruano and Dmitry Zhdannikov

MADRID/MOSCOW, Nov 21 (Reuters) - Russia's Lukoil (LKOH.MM) is close to a deal with shareholders of Repsol (REP.MC), including Spanish builder Sacyr Vallehermoso (SVO.MC), to buy a 30 percent stake in the oil company, but still needs to find financing for the deal, a source close to the talks said on Friday.

Lukoil could pay Sacyr 28 euros a share for its 20 percent stake in Repsol -- double Friday's closing price of 13.91 euros -- said the source.

"Much of the deal has been secured. The price Lukoil would pay (for Repsol shares) is agreed on at 28 euros per share," the source said.

The Russian company would buy another 10 percent stake in Repsol from Spanish savings bank La Caixa, insurance company Mutua Madrilena, and Repinves, which is partly owned by La Caixa, the source said.

But Lukoil still has to find financing for the deal, the source said.  Continued...