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A 2008 estimate set the total world resources of oil shale at 689 gigatones—equivalent to yield of 4.8 trillion barrels (760 billion cubic metres) of shale oil, with the largest reserves in the United States, which is thought to have 3.7 trillion barrels (590 billion cubic metres), though only a part of it is recoverable. [15]
Some statistics on this page are disputed and controversial—different sources (OPEC, CIA World Factbook, oil companies) give different figures. Some of the differences reflect different types of oil included. Different estimates may or may not include oil shale, mined oil sands or natural gas liquids.
The United States has the largest known deposits of oil shale in the world, according to the Bureau of Land Management and holds an estimated 2.175 trillion barrels (345.8 km 3) of potentially recoverable oil. [21] Oil shale does not actually contain oil, but a waxy oil precursor known as kerogen. There is significant commercial production of ...
This is a list of countries by recoverable shale gas based on data collected by the Energy Information Administration agency of the United States Department of Energy. [1] Numbers for the estimated amount of recoverable shale gas resources are provided alongside numbers for proven natural gas reserves .
The national oil company Pemex has limited investment capital, and focuses its effort on what it sees as higher-return conventional oil and gas projects, rather than gas shales or tight oil. [16] The US Energy Information Administration estimates Mexico's recoverable reserves of shale gas to be 681 trillion cubic feet, the fourth largest shale ...
"The carbon dioxide content is 22.8 percent lower than the average of the remainder of world production. "Permian oil has a 57.6-percent advantage over most Middle Eastern oil and it is 74.4 ...
As source rocks for most conventional oil reservoirs, oil shale deposits are found in all world oil provinces, although most of them are too deep to be exploited economically. [27] As with all oil and gas resources, analysts distinguish between oil shale resources and oil shale reserves.
The reserve is the world's largest supply of emergency crude oil, located in underground caverns along the Texas and Louisiana coasts, according to the Department of Energy.