The 24-year-old joins the likes of Alex Brown, Andy Hazell, James Simpson-Daniel and Marco Bortolami in pledging his future to the Guinness Premiership leaders since the beginning of the current campaign.
"I love it here and never contemplated going anywhere else," Wood told www.gloucesterrugby.co.uk "I want to realise my rugby ambitions with Gloucester - not only by trying to win major competitions with this squad but also pushing my claims internationally.
"We have got a fantastic set-up at the club - from the training facilities to the belief and togetherness in the squad - it is a great place to be and I am thrilled to be able to play my part in it.
"I have been involved with the club for a few years and I have some great mentors in Christian Califano and Olivier Azam to learn from. The club has shown faith in me by offering a contract extension, and now I want to repay that on the field."
Wood made his Gloucester 1st XV debut in 2003, subsequently earning a call-up to the England Under-21 and A sides. He was selected for the senior England tour of South Africa in June, but missed out on a full international debut after tearing a muscle in his chest during training on the eve of the first Test.
In total, Wood has made 53 Premiership appearances, including four this season in Gloucester's front row.
"Nick is young, talented and ambitious and is the sort of player we want long-term at the club," said head coach Dean Ryan. "Front row forwards of his quality are massively difficult to find and we trying to develop one who has the capabilities to be top class.
"We want players of Nick's ability in the squad fighting for a first team place. He has developed significantly over the last 18 months and we want to see that continue.
"We have made no secret of the fact we are building a strong squad and we see Nick's long-term ability as a key asset to us. It is great news for the club."
