The 32-year-old has not featured since November 2 due to a thigh problem but is now back in full training.
With just three games of the league season left, Owen accepts he is unlikely to start but is keen to be involved from the bench.
Reigning champions United lead Manchester City by three points at the top of the table before a potentially vital derby at Eastlands on Monday.
"I can't imagine myself getting back and starting in the 11," Owen told MUTV, United's own television station, on Wednesday.
"My mindset has got to be get myself ready mentally, physically and everything else because I might be needed for 10 or 20 minutes at a late stage of the season.
"Who knows? It could be the last game of the season at Sunderland.
"I might have built up enough, whether playing in a reserves game or two, and then that's fine.
"But I think the immediate thing is to get myself mentally ready, just in case the manager says, 'I'll put you on the bench' or whatever and I'll come on for 15 minutes and try to nick a goal if we're struggling."
Owen's only league appearance this season was in a draw at Stoke in September but he has scored three goals in two League Cup matches.