The Tengiz field in Kazakhstan holds 6 billion to 9 billion barrels of recoverable oil.
High estimates put the equivalent recoverable oil at somewhere between 20 billion and 30 billion barrels.
They are estimated to contain recoverable oil reserves of more than 45 million barrels.
Domestic supplies of technically recoverable oil could fuel 200 years of usage at current consumption rates.
Royal Dutch Shell estimates that the waters of the outer continental shelf contain 100 billion barrels of technically recoverable oil.
Because of the marriage of hydrofracking and horizontal drilling, the world is now awash in unconventional, but recoverable oil and gas.
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The US Geological Survey estimates that the Arctic has around a quarter of the world's undiscovered and recoverable oil and gas reserves.
The US Geological Survey estimates that the Bakken field has 6.2bn barrels of recoverable oil, using unconventional methods of fracturing shale oil formations.
But in 2008 the U.S. Geological Survey announced to great fanfare that the formation likely held 4.3 billion barrels of recoverable oil and gas equivalents.
Statoil has suggested the Aldous and Avaldsnes oil discoveries in the North Sea may collectively contain 500 million and 1.2 billion barrels of recoverable oil.
There's no doubt that Eni is fretting about Kashagan, touted as the most important oil discovery of the last three decades, with up to 13 billion barrels of recoverable oil.
Royal Dutch Shell (nyse: RDSA - news - people ) estimates that the waters of the outer continental shelf contain 100 billion barrels of technically recoverable oil.
In a 2012 update, the USGS put the mean undiscovered estimate of recoverable oil in Russia's Arctic provinces alone at 28 billion barrels, plus about 27 trillion cubic meters of gas.
The company will have a 29% stake in Mariner, south-east of Shetland, which is one of the UK's largest undeveloped oil fields, reckoned to hold up to 500m barrels of recoverable oil.
Today, according to both the IEA and the U.S. Department of Energy, America has an astounding 1.4 trillion barrels of recoverable oil, the majority of which is oil shale in the Rocky Mountain West.
As big as the Bakken is (oil billionaire Harold Hamm thinks it could hold 24 billion barrels of recoverable oil), the Bazhenov shale of western Siberia is estimated to be 80 times bigger.
Brazilian authorities, and national oil giant Petrobras, had been working with global oil companies in order to tap the coveted assets, in a field that is thought to contain about 8 billion barrels of recoverable oil.
New finds in the Wattenberg Field north of Denver alone could contain more than a billion barrels of recoverable oil and natural gas, essentially matching the huge Eagle Ford or the Bakken Field in western North Dakota.
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The Barryroe field is now thought to have as much as 500 million barrels of recoverable light oil out of a total reservoir of 1 billion barrels.
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Indeed, the Monterey Shale, which stretches from Central California down through Southern California, holds 15.4 billion barrels of recoverable crude oil, says the U.S. Energy Information Administration.
With trillions of cubic feet of natural gas, and potentially as much as 250 billion barrels of recoverable shale oil, Israel may be on the verge of joining the wealthiest Arab states as a world class energy producer.
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The digitalisation of oil production will make far more oil recoverable from any field.
Indeed, it does appear at first glance that the kinds of shale deposits that contain recoverable gas and oil are very large.
Second, it would be hubristic to assume we could ever know exactly how much oil is recoverable at any one time.
But as those wind down, the replacement fields are harder to tap, and requiring franking technology to make oil more recoverable from promising places like the Bakken Shale in the Dakotas.
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According to the current wisdom of the U.S. Geological Survey, 3 to 4.3 billion barrels of the oil will be recoverable, amounting to 6 months or so of current U.S. consumption.
In addition to the jobs produced by those drilling for natural gas and oil in now recoverable shale formations, there are the additional thousands of jobs produced by the need for the manufacturing and laying of pipelines, and the building or refurbishing of refineries.
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Most resource base projections are based on the oil and gas that is recoverable with current technology.
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Very often, energy firms will search for as much crude as they believe economically recoverable at the current or projected price of oil.
According to a United States Geological Survey, the Levant Basin, shared by Lebanon, Israel and Cyprus, offers up about 122 trillion cubic feet in recoverable gas and an estimated 1.7 billion barrels of oil.
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