The most Blackburn can finish on is 37 points, and even that probably won't be enough, so they're more or less down (remaining games Wigan (H), Chelsea (A)).
I can't see Stoke doing us any favours at QPR. That will put them on 37 points, and you can't see them getting anything at City.
Villa losing their last two games is possible (Spurs (H), Norwich (A)) but due to their goal difference, we'd need 38 points to relegate them. The same applies with Wigan, but that's more unlikely given their last two games (Blackburn (A), Wolves (H)).
So to sum up, I think one win and one draw will be enough.
I can't see Stoke doing us any favours at QPR. That will put them on 37 points, and you can't see them getting anything at City.
Villa losing their last two games is possible (Spurs (H), Norwich (A)) but due to their goal difference, we'd need 38 points to relegate them. The same applies with Wigan, but that's more unlikely given their last two games (Blackburn (A), Wolves (H)).
So to sum up, I think one win and one draw will be enough.