The $US2.1 billion foray by Brookfield Asset Management and Macquarie Capital into Australia's oil and gas production sector has given birth to a new energy player, Quadrant Energy, which has ambitions to expand its presence on the western coast under the chairmanship of Macquarie executive director Kate Vidgen. Quadrant, formed through the acquisition of US oil player Apache Corporation's Australian assets, which completed on Friday, will be one of Western Australia's biggest domestic gas suppliers, supplying 40 per cent of the state's gas, and expects to continue Apache's active drilling activity.