According to the US Energy Information Administration (EIA), Iraq's oil reserves of 112 billion barrels ranks second in the world, only behind Saudi Arabia. The EIA also estimates that up to 90 per cent of the country remains unexplored, due to decades of US-led wars and economic sanctions.
"Prior to the 2003 invasion and occupation of Iraq, US and other western oil companies were all but completely shut out of Iraq's oil market," oil industry analyst Antonia Juhasz told Al Jazeera. "But thanks to the invasion and occupation, the companies are now back inside Iraq and producing oil there for the first time since being forced out of the country in 1973."
Juhasz, author of the books The Tyranny of Oil and The Bush Agenda, said that while US and other western oil companies have not yet received all they had hoped the US-led invasion of Iraq would bring them, "They've certainly done quite well for themselves, landing production contracts for some of the world's largest remaining oil fields under some of the world's most lucrative terms."
Dr Abdulhay Yahya Zalloum, an international oil consultant and economist who has spent nearly 50 years in the oil business in the US, Europe, Asia and the Middle East, agrees that western oil companies have "obtained concessions in Iraq's major [oil] fields", despite "there being a lack of transparency and clarity of vision regarding the legal issues".
Dr Zalloum added that he believes western oil companies have successfully acquired the lions' share of Iraq's oil, "but they gave a little piece of the cake for China and some of the other countries and companies to keep them silent".
In a speech at Fort Bragg in the wake of the US military withdrawal, US President Barack Obama said the US was leaving behind "a sovereign, stable and self-reliant Iraq, with a representative government that was elected by its people".
Of this prospect, Dr Zalloum was blunt.
"The last thing the US cares about in the Middle East is democracy. It is about oil, full stop."