Reservoir 13
Reservoir 13 : A subsurface, porous, permeable rock body containing quantities of oil or gas, which is surrounded by layers of less permeable or impervious rock. The four basic types of hydrocarbon reservoirs are oil, volatile oil, dry gas, and gas condensate. An oil reservoir generally contains three fluids-gas, oil, and water-with oil the dominant product. In the typical oil reservoir, these fluids become vertically segregated with gas, the lightest, occupying the upper part of the reservoir rocks; water, the lower part; and oil, the intermediate section. In addition to its occurrence as a cap or in solution, gas may accumulate independently of the oil; if so, the reservoir is called a gas reservoir
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