After accounting for initial setup costs and maintenance of wind turbines (it is worse than Solar in this regard because of the wear and tear in mechanical parts) and power infrastructure (which has to be designed to handle such variation without any impact on consumers), it will take a very long time to break even, if at all. And don't forget that we will still need something reliable like nuclear or fossil fuels to back it up... which we already have enough of to last for thousands of years.
So, basically, all we get with wind is more work for no gain at all (not to mention the unnecessary environmental harm). I am sure Statoil is not ignorant of this. They are just using a small portion of their 100 billion dollar yearly revenue in this to please the eco-terrorists.
[1] http://www.audubon.org/news/will-wind-turbines-ever-be-safe-...