The value of an oil and gas company value is determined by its reserves, level of production, earnings, growth potential, production cost, commodity price at the time of the assessment, and a number of secondary factors.

Dynamic Offshore Resources LLC has acquired substantially all of the Gulf of Mexico properties of XTO Offshore Inc. and other related subsidiaries of ExxonMobil Corp., for $182.5 million.

In a deal with Alaskan Chevron subsidiary Unocal, private operator Hilcorp has acquired Cook Inlet oil and gas assets for an undisclosed sum.

Dynamic Offshore Resources LLC has entered into a new four-year, $750 million senior secured credit facility on July 7 with a syndicate of ten banks led by The Royal Bank of Scotland plc.

Privately held Laredo Petroleum Inc. has entered a definitive agreement to buy Broad Oak for roughly $1 billion.

Ireland-based Providence Resources plc has sold its US oil and gas portfolio in the Gulf of Mexico to Dynamic Offshore Resources LLC for $15 million in cash up front and an additional $7 million deferred cash payment.