Wood’s spot-kick, smashed high beyond Emi Martinez, was his 200th career goal and gives Forest something to defend at Villa Park next week.
The New Zealand international only returned this month, having been sidelined since October with his knee issue.
He missed the entirety of Sean Dyche’s reign, having surgery in December, but started the quarter-final first-leg draw in Porto three weeks ago.
Lucas Digne’s baffling decision to raise his arms and handle the ball as Omari Hutchinson tried to keep it in play gave Wood his chance with 19 minutes left.
There was an audible cheer when Wood stepped up to take the penalty – Morgan Gibbs-White having missed from the spot against Strum Graz and Braga this season.
There was a sense of expectation, which is only fair as Wood has not missed a penalty in 10 years – since failing to score against Hull for Leeds in April 2016.
He has now scored 28 successive spot-kicks.
“That’s what I have to do and that’s what I try to do. It’s the job, the responsibility that my team gives me,” he told TNT.
“It’s cup competitions. They come down to small margins at times. Both teams played very well. But it’s small moments that can potentially change games. Thankfully it went in our favour tonight and hopefully again next week.
“It’s one leg of the tie. It’s nice to have the advantage but going to Villa Park will be a tough game. They’re good at their place. But we’ve done the job here at home and now hopefully we’ll build into next week.”
He scored in last Friday’s 5-0 Premier League win at Sunderland – his first goal since a penalty against Midtjylland in October – and has six goals in 19 games for club and country this season.
Wood, 34, has explained he will have to manage his knee injury for the rest of his life – but after watching so much of Forest’s battle against the Premier League drop from the sidelines, he is just glad to be back in action and scoring.
“That’s all I wanted to do,” he said. “I wanted to get back fit and firing to help my team as best as I can at the end of the season. I knew we had a lot to play for when I was fighting to get fit and it’s showing. It’s some big competitions to be a part of.
“We’re in the crunch end of the season. We need to perform on both parts and we’ll be looking to do that for sure.”