Oil & Gas Costs on Breagh overrunOil and gas explorer Sterling Resources has said costs have overrun by 17% on the southern North Sea Breagh gas development. March 9th 2012, 1:24 am 1 min read Facebook An icon of a facebook f logo. LinkedIn An icon of the LinkedIn logo. Twitter An icon of the Twitter logo. Oil and gas explorer Sterling Resources has said costs have overrun by 17% on the southern North Sea Breagh gas development.