It's a pretty straightforward fight, so there's not all that much advice I can give. But I'll try.
Depending on your Warrior build, you may not be the best tank; chances are Alistair is better with his sword/shield combo. Whoever tanks, make sure Threaten is active, and possibly throw on another Shield ability if you have it by that point in the game.
Since you're a warrior, you're gonna have a Circle Mage in your party. Not much to say here except throw every single spell you have at the Ogre and keep him out of the way. Since you're playing on normal difficulty, friendly fire isn't really an issue, so just spam as fast as you can. As for Flaming Weapons, I don't think it makes all that much of a difference this early in the game, so feel free to turn that off if you prefer to have extra mana to fire off an extra spell or 2.
If somebody gets grabbed, use a knockdown ability like Shield Bash or Pommel Strike to free them. This doesn't always work though, since the Ogre has high Physical Resistance, so be careful when you use it.
Get the HELL out of the way when the Ogre does Ram or the ground pound (forgot the proper name). The ground pound is an AOE stun that can pretty much end the fight right there.