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The AAPG/Datapages Combined Publications Database
AAPG Bulletin
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With the search for new oil reserves extending to all corners of the earth to-day, the activities of the American Association of Petroleum Geologists are becoming more international. The continued growth in world population and the constant improvement in the standard of living place a tremendous responsibility on all exploration men to provide the necessary raw materials and resources needed. In meeting this challenge and to properly represent the growing membership of the American Association of Petroleum Geologists, a healthy evolution has been taking place in the Association.
Detailed statistics have been prepared and studied for 236 or all of the major oil fields of the free world. They represent 217 billion barrels, which is 82.5% of the free world's expected ultimate. The study shows the bulk of our oil occurs: (1) on the stable side of basins, (2) in anticlines, (3) in sandstone and carbonate reservoirs, (4) from formations of Mesozoic age or younger, and (5) from a depth range of 2,000-8,000 feet.
Most of the world's ultimate oil is 30° API gravity or above with mixed and asphaltic base oils predominating. The discovery of the "big" giants has been cyclic with 10-year intervals starting with the Lake Maracaibo discovery in 1917.
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