23 picture in regard to natural gas is even bigger. Nevertheless there remain “inter-related geographical, political, economic, technological, legal, and psychological obstacles to the further exploration for, and development of, Caspian Sea region energy resources.”7 Because of these obstacles, Central Asia will remain much less attractive to the U.S. than other regions as a future source of energy reserves. Sources give widely varying estimates of the energy reserves in Central Asia.8 According to British Petroleum, the world had 1200.7 billion barrels proven reserves of oil in 2006.9 Of this total, Kazakhstan had 3.3 percent and Uzbekistan 0.3 percent. By contrast, Russia had 6.3 percent, Venezuela 6.6 percent and the Middle East 61.9 percent. According to the U.S. Energy Information Administration, Central Asia has between 17 and 49 billion barrels of reserves comparable to Qatar on the low end and the U.S. on the high end.10 These assessments depend on the price of oil. As the price rises so do estimates of proven reserves because these estimates rely often on what is economically viable to extract. For example, according to Forbes, the reserves of oil in Canada jumped from 5 billion to 180 billion barrels in 2003 when the Alberta oil sands were reevaluated as economically viable given the rise of oil prices.11 According to British Petroleum, the world had 173.9 trillion cubic meters of proven natural gas reserves in 2006. Of this total, Kazakhstan had 1.7 percent, Turkmenistan 1.6 percent and Uzbekistan 1.0 percent. By contrast, Russia had 26.6 percent, Venezuela, 2.4 percent and the Middle East 40.1 percent. The U.S. Energy Information Administration estimates that Central Asia has reserves comparable to those of Saudi Arabia. As one Russian analyst has concluded: “…the theory of a "second Persian Gulf" on the Caspian is greatly exaggerated, and that Nichol, Central Asia: Regional Developments and Implications for U.S. Interests, CRS Research Service Issue Brief for Congress, July 20 2005, p. CRS-14. 7 Bernard A. Gelb, Caspian Oil and Gas: Production and Prospects, CRS Report for Congress, September 8, 2006, p. 5. 8 Energy Information Administration, Caspian Sea Energy Data, Statistics and Analysis - Oil, Gas, Electricity, Coal January 2007, <http://www.eia.doe.gov/emeu/cabs/Caspian/pdf.pdf> (January 10 2007). 9 British Petroleum, Statistical Review of World Energy 2006, <http://www.bp.com/productlanding.do?categoryId=6842&contentId=7021390> (January 10 2007). 10 Ibid. 11 “Canada To Compete In Oil Market,” Oxford Analytica, February 17 2005, <http://www.forbes.com/energy/2005/02/17/cz_0217oxan_canadaoil.html> (January 10 2007). Synthetic crude from the oil sands only becomes economically viable when the price of a barrel of oil exceeds $30. Energy Information Agency, Canada: Country Analysis Brief: Oil, April, 2006. <http://www.eia.doe.gov/emeu/cabs/Canada/Oil.html> (January 10, 2007).