Oil and gas group Melrose Resources has announced its first production from gas fields off the Bulgarian coast.The Kavarna and Kaliakra fields will today be opened by Bulgaria's Minister for Economy, Energy and Tourism. Most of the gas from the fields will be sold to Bulgaria's state-owned gas utility company Bulgargaz, with the remainder going to a local industrial user.The agreed price is ahead of previous guidance, Melrose said.'We are delighted to achieve first production from our two new Bulgarian gas fields,' said chief executive David Thomas. 'This represents an important milestone since the fields are expected to double the Company's cash generation over the next few years and will diversify the production portfolio.'Melrose also reported progress with its French, Turkish and Egyptian exploration activities.