List of countries by proven oil reserves in the context of "Economy of Russia"

The petroleum or oil industry in Russia is one of the largest in the world. Russia has the largest reserves and was the largest exporter of natural gas. It has the sixth largest oil reserves, and is one of the largest producers of oil.

Russia is the main transit country for oil from Kazakhstan. Until 2022 Russia was by far the world's largest natural gas exporter.

Iraq was the world's 5th largest oil producer in 2009, and has the world's fifth largest proven petroleum reserves. Just a fraction of Iraq's known fields are in development, and Iraq may be one of the few places left where vast reserves, proven and unknown, have barely been exploited. Iraq's energy sector is heavily based upon oil, with approximately 94 percent of its energy needs met with petroleum. In addition, crude oil export revenues accounted for over two-thirds of GDP in 2009. Iraq's oil sector has suffered over the past several decades from sanctions and wars, and its oil infrastructure is in need of modernization and investment. As of June 30, 2010, the United States had allocated US$2.05 billion to the Iraqi oil and gas sector to begin this modernization, but ended its direct involvement as of the first quarter of 2008. According to reports by various U.S. government agencies, multilateral institutions and other international organizations, long-term Iraq reconstruction costs could reach $100 billion (US) or higher.

Petroleum production in Canada is a major industry which is important to the overall economy of North America. Canada has the third largest oil reserves in the world and is the world's fourth largest oil producer and fourth largest oil exporter. In 2019 it produced an average of 750,000 cubic metres per day (4.7 Mbbl/d) of crude oil and equivalent. Of that amount, 64% was upgraded from unconventional oil sands, and the remainder light crude oil, heavy crude oil and natural-gas condensate. Most of the Canadian petroleum production is exported, approximately 600,000 cubic metres per day (3.8 Mbbl/d) in 2019, with 98% of the exports going to the United States. Canada is by far the largest single source of oil imports to the United States, providing 43% of US crude oil imports in 2015.

The petroleum industry in Canada is also referred to as the "Canadian Oil Patch"; the term refers especially to upstream operations (exploration and production of oil and gas), and to a lesser degree to downstream operations (refining, distribution, and selling of oil and gas products). In 2005, almost 25,000 new oil wells were spudded (drilled) in Canada. Daily, over 100 new wells are spudded in the province of Alberta alone. Although Canada is one of the largest oil producers and exporters in the world, it also imports significant amounts of oil into its eastern provinces since its oil pipelines do not extend all the way across the country and many of its oil refineries cannot handle the types of oil its oil fields produce. In 2017 Canada imported 405,700 bbl/day (barrels per day) and exported 1,115,000 bbl/day of refined petroleum products.

Saudi Arabia is a high-income developing economy highly reliant on its petroleum sector. Oil and gas account for approximately 22.3% of Saudi GDP and 55% of government revenue, with substantial fluctuations depending on oil prices each year.

The kingdom has the second-largest proven petroleum reserves, and the fourth-largest measured natural gas reserves. Saudi Arabia is currently the largest exporter of petroleum in the world. Other major parts of the economy include refining and chemical manufacturing from the oil reserves, much of which is vertically integrated in the state-owned enterprise, Saudi Aramco. Saudi Arabia is a permanent and founding member of OPEC.