A gas leak on a North Sea oil platform has been stopped after more than seven weeks, its operators said Wednesday.

Heavy mud was pumped into the well in a bid to "kill" the leak on Total's Elgin platform, which is around 150 miles from Aberdeen, Scotland.

Gas had been escaping from the site since late March. Reuters reported the leak cost Total around $3 million a day in relief operations and lost net income.

The French firm's chief executive Christophe de Margerie has previously said the Elgin leak would cost the company more than $300 million in lost production in a worst-case scenario where production did not restart before the end of the year.

Read more on this story from Britain's ITV News. 

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