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Outcrop of Ordovician kukersite oil shale, northern Estonia Lower Jurassic oil shale near Holzmaden, Germany. Oil shale geology is a branch of geologic sciences which studies the formation and composition of oil shales–fine-grained sedimentary rocks containing significant amounts of kerogen, and belonging to the group of sapropel fuels. [1]
Oil shale is an organic-rich fine-grained sedimentary rock containing kerogen (a solid mixture of organic chemical compounds) from which liquid hydrocarbons can be produced. In addition to kerogen, general composition of oil shales constitutes inorganic substance and bitumens.
In the Paleogene, the Qatar Arch was comparatively stable and Abu Dhabi was at the edge of the Rub al Khali and Pabdeh-Gurpi (centered in the North Emirates) basins. The Hasa Group includes Umm Er Radhuma, Rus and Dammam formations. The Pabdeh Formation is largely offshore and contains 2,200 feet (670 metres) of shale and argillaceous limestone.
According to U.S. Energy Information Administration estimates published in June 2013, the total Bazhenov shale prospective area has a resource of a risked tight oil in-place of 1,243 billion barrels (1.976 × 10 11 cubic metres) and a risked shale gas in-place of 1,920 trillion cubic feet (54 trillion cubic metres), with 74.6 billion barrels (1 ...
Shale is characterized by its tendency to split into thin layers less than one centimeter in thickness. This property is called fissility. [1] Shale is the most common sedimentary rock. [2] The term shale is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the narrower sense of clay-rich fissile mudrock. [3]
Location of the kukersite deposits within the Baltic Oil Shale Basin in northern Estonia and Russia. The Baltic Oil Shale Basin covers about 3,000 to 5,000 square kilometres (1,200 to 1,900 sq mi). [1] [5] [6] [7] Main kukersite deposits are Estonian and Tapa deposits in Estonia, and Leningrad deposit in Russia (also known as Gdov or Oudova ...
The Cardium Formation is composed primarily of beds of massive, fine-grained to conglomeratic sandstone, which are separated by thick layers of shale. The formation is subdivided into the following members from top to base: Sturrock Member (sandstone) Leyland Member (shale) Cardinal Member (sandstone) Kiska Member (shale) Moosehound Member (shale)
The Lewis Shale is an olive-gray marine shale with some thin beds of claystone, siltstone, sandstone, and limestone. It was deposited in the Western Interior Seaway in the late Cretaceous. [1] The formation crops out in the Bighorn Basin, Green River Basin, Powder River Basin, San Juan Basin, and Wind River Basin.