ConocoPhillips’ (NYSE: COP) 2012 net production in Nigeria averaged 43,000 barrels of oil equivalent per day through October, composed of about 60 percent natural gas and 40 percent liquids. At the end of October, the net carrying value of ConocoPhillips’ Nigerian assets was about $600 million, according to a press release.

The transaction is expected to close by mid-2013