A stake in Tullow Oil PLC's Jubilee oilfield in Ghana has been put up for auction, the Times reported Sunday.Standard Chartered PLC and Barclays PLC have been appointed to auction the $3 billion stake, which is expected to attract interest from Royal Dutch Shell PLC (RDSB) and BP PLC (BP) as well as Chinese state-owned groups, it said.Kosmos Energy owns the 30% stake and its private-equity owners, Blackstone and Warburg Pincus L.L.C, are keen to pocket the cash, it said.The report didn't provide further details on the stake held by Tullow Oil.Source: GHP/Dow Jones