Global exploration senior vice president Pal Haremo said: "Of course, we have concerns related to that. But I think that's something that's natural. There are risks with exploring for oil and gas, and we should work in a way that is open and transparent so that stakeholders can look into what we are doing."
He said resistance to fossil fuel exploration was not more pronounced in New Zealand than at home: "This is something that we meet everywhere ... we are facing these challenges in Norway as well."
Mr Bridges said Statoil held the only permit which could eventually allow drilling of more than 1500 metres, and possibly up to 2500 metres.
"It's great to have someone of their calibre, of their expertees, working there."
Green Party energy spokesman Gareth Hughes said that the expansion of exploration increased the possibility of a dangerous oil spill and would channel more money into Norwegian's pension fund. Statoil was 67 per cent Government-owned.
Mr Haremo said New Zealand conditions were not more difficult than Norway or any other "frontier basins".
Australian giant Woodside Petroleum and Singaporean-based Mont-D'Or also won licences, which were given out in an awards ceremony in Parliament's Grand Hall.
Texan oil firm Anadarko has faced highly-publicised protest from Greenpeace, which sailed yachts within 500 metres of the company's exploration ship off the coast of Raglan in defiance of a law change which created an exclusion zone around prospecting sites.
Anadarko spokesman Alan Seay said it would take 70 days of drilling before the company could report results.
He said the company's emergency response plan showed that in a worst case scenario an oil spill would reach New Zealand's coast, but this was only if no intervention occurred.
Mr Seay said that the plan had been sent to Maritime New Zealand.
Maritime New Zealand said it could make the document public next week, after it had vetted it for private or commercial sensitivities.
At present, New Zealand claimed around 42c per dollar or profits made by oil firms. Mr Bridges said this was much smaller than the 90c paid by firms in Norway's waters, but this difference reflected the likelihood of finding fossil fuels.
He said Government would consider raising royalties if a company made a "big find".
Offshore permits
• Statoil (Norway) - Reinga-Northland
• Woodside (Australia) and NZ Oil & Gas - Taranaki
• Woodside and NZ Oil & Gas - South-Canterbury
• NZ Oil & Gas - Great South Basin, South-Canterbury
• Octanex (NZ) - Taranaki
Onshore permits
• Mont D'Or (Singapore) - East Coast
• AWE & Mitsui E&P (Australia) - Taranaki
• TAG Oil (NZ/Canada) - Taranaki
• Eastern Petroluem & East West Petroleum (NZ/Canada) - East Coast
• Petrochem (NZ) - Taranaki
