When the Flames defeated the Oilers 5-0 in the final Battle of Alberta at Rexall Place, they locked themselves out of last place in the league standings.
Calgary currently has 72 points. Edmonton is now sitting at 67, and with two games left, they can finish with a maximum of 71 points.
Second last in the NHL is Toronto, also with 67 points: but with four games left, they can finish with a maximum of 75 points. So while it isn't possible for the Flames to finish 30th overall, they can still finish 29th, and still get decent draft lottery odds.