It might be possible, but in order the planets have to be perfectly aligned for OU to get in.
OU has to win out. That means we beat TCU, TECH and WVU on the road and then either beat an undefeated WVU or a one loss Texas team in the conference championship game.
Still that doesn't get us there. Bama, Ohio State, Georgia and Clemson are all undefeated and occupy the top four at the moment. Only one of the four have a guaranteed loss and that is Bama and Georgia. Then Notre Dame is still undefeated. So, until ND loses a game they will take the 4th spot when one of Bama and Georgia gets a loss on their record.
Behind ND are PSU and Washington with one loss each. Ohio State gets Michigan at home and already has a win over PSU. So, the only way you keep Ohio State out of the playoffs is a fluke loss by Michigan or in the B1G CCG. I don't see that happening. Who is going to beat Clemson? Virginia Tech, Miami, maybe not likely.
So, in my mind Bama/Georgia, Ohio State, Clemson, Notre Dame with a one loss Washington up in front of OU. I say Washington in front of OU as the Huskies got snubbed and likely won't this year.
I think OU can win out, but it isn't going to be easy. OU is going to have to play great football to win out and then get some luck with ND, Clemson, Georgia losing a couple of games along with Washington losing another game.
We have to hope that both Texas and WVU have to win out except when they play at Texas on November the 3rd.
We could possibly have two top six teams on the schedule the last two weeks of the season. OU beats WVU in Morgantown and then beats a one loss Texas team in Dallas. If Texas beats WVU then Texas will likely climb up the ladder. Then OU beats a once beaten WVU in Morgantown and we get back up in the top 6 or 7.
Like I said at the top, OU can get there, but they have to get the defense going and things have to go their way from here on out.