AGL owns wells in the Bowen, Surat and Cooper/Eromanga basins (some acquired through its recent takeover of Mosaic Oil). Producing fields include Fairymount and Silver Springs/Renlim, where construction has begun for the development of an underground gas storage facility. | www.agl.com.au

Beach Energy operates eight oil fields in south-west Queensland, with 47 operating wells. Major fields and processing facilities are located at Kenmore and Bodalla with minor facilities at Black Stump, Bargie, Glenvale/Coolum, Byrock and Marcoola. | www.beachenergy.com.au

Bengal Energy is part of a joint venture behind the Cuisinier oil discovery on the Barta block, where it has producing wells. It has an interest in other properties and prospects in the Cooper Basin including the Barrolka, Tookoonooka and Wompi blocks. | www.bengalenergy.ca

Origin Energy | Origin Energy has conventional gas operations in the Kincora, Yellowbank and Rolleston fields, with the potential for future CSG development in these areas. | www.originenergy.com.au

Santos produces sales gas, ethane, crude oil and gas liquids from the Cooper/Eromanga basins. Gas and ethane are processed at the Ballera plant in Queensland and Moomba in South Australia. South-west Queensland crude oil gathered from areas such as Watson, Tickalara, Cooroo and Naccowlah is processed at Jackson and then transported to the Lytton oil refinery in Brisbane. | www.santos.com