The striker, whose contract expires in the summer, was said to have agreed a move to the Estadio da Luz at the end of the season, according to reports in Portugal earlier this week. However, Orobitg insists that no such deal is in place.
"[Benfica winger] Nolito has said great things about Benfica," he told Radio Renascenca. "They are friends and he wants Soriano to go to Portugal.
"Soriano wants to go because Benfica are a very good club. It is true that I have been in Lisbon and that Benfica are interested, we have known this since the summer.
"He can sign a contract with another club already, but there are some things going right now, we will see how they go."
Soriano, 26, has also been linked with a move to Premier League outfits QPR, Swansea and Wigan.