Advanced Petroleum Company (APCO)
Advanced Petroleum Company (APCO) is an operating company for a joint venture (JV) of shareholding partners that originally included Cliveden (37 percent share); Hi-Tech Group (28 percent); Sudapet (17%); the State of Khartoum (10%) and Heiglig Petroleum (8%).  APCO was established on 21 October 2003 by the signing of an Exploration & Production Sharing Agreement (EPSA) between the Ministry of Energy and Mining of Sudan and the company’s shareholders.
APCO's concession area is Block C, according to the APCO website, straddling the border between South Sudan and Sudan. According to an April 2008 report by the European Commission on Oil in Sudan, APCO drilled five dry wells in Block C in 2005 and 2006, leading to the withdrawal of Cliveden from the consortium.
- "Sudan Watch" Sudan Watch blog, 15 June 2005.
- "Advanced Petroleum Company" APCO website, Retrieved 2 July 2012.
- "Sudan's Oil Industry - Facts and Analysis, April 2008" APCO website, Retrieved 2 July 2012.