Sudan is holding up extension of licenceto ONGC Videsh over an oil field as the Government seeks higher royalties, tax and profit petroleum even as it delays paying nearly $300 million in oil dues. The licence for Block 2B expired last week and an automatic 5-year extension is available, but Sudan, whose revenues have been hit with a drop in oil prices, wants higher taxes and royalties before it agrees to the same, officials said. OVl, the overseas arm of the state-owned Oil and Natural Gas Corporation (ONGC), in 2003 had bought a 25 per cent stake in Greater Nile Oil Project (GNOP) comprising Block 1, 2 and 4 in the undivided Sudan. It lies in the prolific Muglad basin, about 780 kms in the South-West of Khartoum, the capital of Sudan.