Wells then notched his second goal of the match with a well-placed header in the 82nd minute to secure a point for Huddersfield and extend their unbeaten Championship run to six games.
Powell told the club's official website: "I'm very pleased with the performance. I thought we passed the ball very well and fashioned some really good chances.
"This result gives keeps the momentum going and our confidence high going into next weekend.
"If you manage players in the right way, I think they will respond. Wells did that today. He's a big player for us."
Huddersfield are 17th in the Championship with 17 points from their 14 matches so far this season.