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Prudhoe Bay Oil Field is a large oil field on Alaska's North Slope.It is the largest oil field in North America, covering 213,543 acres (86,418 ha) and originally contained approximately 25 billion barrels (4.0 × 10 9 m 3) of oil. [1]
A structure map, looking downward, generated by contour map software for an 8,500-ft-deep gas and oil reservoir in the Erath Field, Erath, Louisiana. The left-to-right gap near the top indicates a fault line between the blue and green contour lines and the purple, red, and yellow lines. The thin red circular line in the middle indicates the top ...
As a result, all the oil wells up to 1928 were less than 5,000 feet (1,500 m) or 6,000 feet (1,800 m) deep. However, in 1928, the No. I-B University discovery well found oil at 8,520 feet within the Ordovician formations of Big Lake.
This is when most of the hydrocarbons are generated. Approximately 50%-90% petroleum is made and expelled at this point. The next step is the hydrocarbons entering the oil window. The oil window has to do with the source rock being the appropriate maturity, and also being at the right depth for oil exploration.
The oil is highly viscous, but considerably less so than the Athabasca oil sands, and is somewhat less sulfurous. The depth of the deposits is 400 to 600 metres (1,300 to 2,000 ft) and they are from 15 to 35 metres (49 to 115 ft) thick. [23] They are too deep to surface mine. Much of the oil sands are on Canadian Forces Base Cold Lake.
This list of oil fields includes some major oil fields of the past and present. Countries by proven oil reserves 2017. The list is incomplete; there are more than 25,000 oil and gas fields of all sizes in the world. [1] However, 94 % of known oil is concentrated in fewer than 1,500 giant and major fields. [2]
Oil Field Scene, East Texas c. 1930 A depiction of a muddy Main Street at the East Texas Oil Museum, in Kilgore, Texas. Several early attempts were made to produce oil in the area, beginning in 1911, with the failed Millville Oil Company, but drilling technology had not progressed sufficiently to reach oil at the depths it is found there, which are mainly below 3,501 feet (1,067 m); most early ...
Petroleum, or evidence of its immediate occurrence, can be found on the surface of the Earth. Oil seeps can be found near a fault zone, where the movement of Earth's crust can expose petroleum source rock, and thus the crude oil itself. [15] They can also be found on the ocean floor, and can be found using satellite imaging. [16]