Southland District Council has granted Greymouth Petroleum Ltd resource consent to explore for petroleum and drill an exploratory well on a site at Horseshoe Bay Road on Stewart Island.
The resource consent was non-notified.
Green Party mining spokesperson Catherine Delahunty said today Stewart Island deserved protection from oil exploration.
"The National Government is failing to protect our special places by allowing mineral surveys in World Heritage Areas and oil exploration on Rakiura/Stewart Island which is known for its conservation values," said Ms Delahunty.
"Development of areas known for their natural beauty, such as Rakiura/Stewart Island, is a threat to our economically valuable clean, green image."