USGS World Petroleum Assessment 2000
Oil and natural gas account for approximately 63 percent of the world’s total energy consumption. The U.S. Geological Survey periodically estimates the amount of oil and gas remaining to be found in the world. Since 1981, each of the last four of these assessments has shown a slight increase in the combined volume of identified reserves and undiscovered resources. The latest assessment estimates the volume of technically recoverable conventional oil and gas that may be added to the world's reserves, exclusive of the United States, in the next 30 years. The USGS World Petroleum Assessment 2000 reports an increase in global petroleum resources, including a 20-percent increase in undiscovered oil and a 14-percent decrease in undiscovered natural gas compared to the previous assessment (table 1).
Since oil became a major energy source about 100 years ago, about 539 billion barrels of oil has been produced outside the United States. The USGS estimates the
total amount of undiscovered, technically recoverable, conventional petroleum-oil, gas, and natural gas liquids combined-outside the United States, to be about 1634 billion barrels of oil equivalent (BBOE) (table 1).
Of this total, conventional oil is 649 billion barrels,
natural gas is 778 BBOE,
and natural gas liquids (NGL) is 207 BBOE.
This is the first USGS world petroleum assessment to include estimates of reserve growth. Reserve growth estimates nearly equal those of undiscovered resources. Reserve growth results from a variety of sources, including technological advancement in exploration and production, increases over initially conservative estimates of reserves, and economic changes. In addition to the undiscovered resources, approximately 612 billion barrels of oil, 551 BBOE of natural gas, and 42 BBOE of NGL are anticipated (ожидактся) from reserve growth (table 2).
For the USGS World Petroleum Assessment 2000, the world was divided into approximately 1,000 petroleum provinces, based primarily on geologic factors. (These provinces were grouped into eight regions roughly comparable to the eight economic regions defined by the U.S. Department of State and used in table 3.)
Significant petroleum resources are known to exist in 406 of these provinces. Geologists analyzed 159 total petroleum systems (TPS) containing 270 assessment units (AU) and formally assessed 149 TPS and 246 AU, located in parts of 128 provinces. The assessed provinces account for 95 percent of the world’s historic production and include both significant established (priority) and prospective (boutique) provinces.
Although the total volume of undiscovered petroleum for the world shows a modest 5-percent increase over the previous assessment, the resource volumes by commodity and their regional distribution have shifted significantly (table 3).
The assessment results (exclusive of the United States) indicate that the Middle East and North Africa region contains 35.4 percent of the world’s undiscovered conventional oil;
the former Soviet Union contains 17.9 percent;
and the Central and South America region contains 16.2 percent.
For undiscovered conventional natural gas (exclusive of the United States),
the former Soviet Union holds 34.5 percent of the world’s total;
the Middle East and North Africa region holds 29.3 percent.
For both oil and natural gas, a significant part of the undiscovered resources outside the Middle East lie offshore in water as deep as 4000 m.
Figure 1. Oil endowment (cumulative production plus remaining reserves and undiscovered resources) for provinces assessed. Darker green indicates more resources.
Areas:
1: Former Soviet Union
2: Middle East and North Africa
3: Asia Pacific
4: Europe
5: North America
6: Central and South America
7: Sub-Saharan Africa and Antartica
8: South Asia
http://pubs.usgs.gov/fs/fs-062-03/
http://pubs.usgs.gov/fs/fs-062-03/FS-062-03.pdf
http://en.wikipedia.org/wiki/File:USGS_world_oil_endowment.png
http://en.wikipedia.org/wiki/Oil_reserves
Since oil became a major energy source about 100 years ago, about 539 billion barrels of oil has been produced outside the United States. The USGS estimates the
total amount of undiscovered, technically recoverable, conventional petroleum-oil, gas, and natural gas liquids combined-outside the United States, to be about 1634 billion barrels of oil equivalent (BBOE) (table 1).
Of this total, conventional oil is 649 billion barrels,
natural gas is 778 BBOE,
and natural gas liquids (NGL) is 207 BBOE.
This is the first USGS world petroleum assessment to include estimates of reserve growth. Reserve growth estimates nearly equal those of undiscovered resources. Reserve growth results from a variety of sources, including technological advancement in exploration and production, increases over initially conservative estimates of reserves, and economic changes. In addition to the undiscovered resources, approximately 612 billion barrels of oil, 551 BBOE of natural gas, and 42 BBOE of NGL are anticipated (ожидактся) from reserve growth (table 2).
For the USGS World Petroleum Assessment 2000, the world was divided into approximately 1,000 petroleum provinces, based primarily on geologic factors. (These provinces were grouped into eight regions roughly comparable to the eight economic regions defined by the U.S. Department of State and used in table 3.)
Significant petroleum resources are known to exist in 406 of these provinces. Geologists analyzed 159 total petroleum systems (TPS) containing 270 assessment units (AU) and formally assessed 149 TPS and 246 AU, located in parts of 128 provinces. The assessed provinces account for 95 percent of the world’s historic production and include both significant established (priority) and prospective (boutique) provinces.
Although the total volume of undiscovered petroleum for the world shows a modest 5-percent increase over the previous assessment, the resource volumes by commodity and their regional distribution have shifted significantly (table 3).
The assessment results (exclusive of the United States) indicate that the Middle East and North Africa region contains 35.4 percent of the world’s undiscovered conventional oil;
the former Soviet Union contains 17.9 percent;
and the Central and South America region contains 16.2 percent.
For undiscovered conventional natural gas (exclusive of the United States),
the former Soviet Union holds 34.5 percent of the world’s total;
the Middle East and North Africa region holds 29.3 percent.
For both oil and natural gas, a significant part of the undiscovered resources outside the Middle East lie offshore in water as deep as 4000 m.
Figure 1. Oil endowment (cumulative production plus remaining reserves and undiscovered resources) for provinces assessed. Darker green indicates more resources.
Areas:
1: Former Soviet Union
2: Middle East and North Africa
3: Asia Pacific
4: Europe
5: North America
6: Central and South America
7: Sub-Saharan Africa and Antartica
8: South Asia
http://pubs.usgs.gov/fs/fs-062-03/
http://pubs.usgs.gov/fs/fs-062-03/FS-062-03.pdf
http://en.wikipedia.org/wiki/File:USGS_world_oil_endowment.png
http://en.wikipedia.org/wiki/Oil_reserves