New float Cooper Energy has 25% in the discovery, from the only well the company has drilled to date since its listing.

Beach managing director Reg Nelson said the flow rate from Sellicks-1 will be about 1,000 barrels of oil per day (bopd) by January building from a base of about 500 bopd over the next few weeks. Beach also recently saw its Acrasia oil discovery come into production.

"The company led the charge on the little explored western and southern flanks of the Cooper Basin with the most experienced team ever assembled to develop this province," Mr Nelson said.

"Today's start of production from Sellicks is Beach further delivering on its strategy to build the Cooper/Eromanga as the company's engine room for revenue, profits and significant exploration upside."

The Sellicks structure is estimated to contain up to 1.5 million barrels of recoverable oil with an estimated 3.6 million barrels of oil in place.

Mr Nelson said the reserve at Sellicks is comparable in size to the Acrasia field, discovered earlier this year to the northeast of Moomba. Beach is a 25% joint venture partner in that discovery which includes the recent Acrasia-3 appraisal well.

Beach Petroleum has scheduled a base program of six new oil wildcats in the South Australian section of the Cooper Basin in the opening half of next year.