There are plenty of possibilities for the Raiders to get into the playoffs. Even if they lose this week, they will still have a shot of making the playoffs if they beat the Chargers. Even if they will have no hope if they do not beat the Chargers.
I can say with a certain amount of confidence that if the Raiders win out they be in the playoffs.
If the Raiders win out they will win the wild card if:
For some tie breaking reason the Raiders will lose the tie breaker to the Titans if the Dolphins beat the Jets in Week 17.
If the Raiders lose to the Chiefs, but beat the Chargers they will get the wild card if:
The Bengals and Jets lose their last two, and the Titans lose one or two, and the Chiefs lose to the Broncos.
Jets Remaining Schedule
Week 16: Giants
Week:17: @ Dolphins
Bengals Remaining Schedule
Week 16: Cardinals
Week 17: Ravens
Titans Remaining Schedule
Week 16: Jaguars
Week 17: @ Texans
Raiders Remaining Schedule
Week 16: @ Chiefs
Week 17: Chargers