Top 10 countries with technically recoverable shale gas resources

Rank, Country, Shale gas (trillion cubic feet)
1 China————————– 1,115
2 Argentina———————— 802
3 Algeria————————— 707
4 U.S.*—————————– 665 (1,161)
5 Canada————————- 573
6 Mexico————————— 545
7 Australia———————— 437
8 South Africa——————– 390
9 Russia————————– 285
10 Brazil————————— 245
World Total——————— 7,299
When considering the market implications of abundant shale resources, it is important to distinguish between a technically recoverable resource, which is the focus of this report, and an economically recoverable resource. Technically recoverable resources represent the volumes of oil and natural gas that could be produced with current technology, regardless of oil and natural gas prices and production costs. Economically recoverable resources are resources that can be profitably produced under current market conditions.
The economic recoverability of oil and gas resources depends on three factors: the costs of drilling and completing wells, the amount of oil or natural gas produced from an average well over its lifetime, and the prices received for oil and gas production. Recent experience with shale gas in the United States and other countries suggests that economic recoverability can be significantly influenced by above-the-ground factors as well as by geology.
Key positive above-the-ground advantages in the United States and Canada that may not apply in other locations include private ownership of subsurface rights that provide a strong incentive for development; availability of many independent operators and supporting contractors with critical expertise and suitable drilling rigs and, preexisting gathering and pipeline infrastructure; and the availability of water resources for use in hydraulic fracturing.
Full report: Shale Oil and Shale Gas Resources
Source: EIA