Within an energy context there are different types of reservoirs and the word reservoir can refer to: Reservoir - Oil and Gas: a formation of rock in which oil and natural gas has accumulated (Figure 1). The primary drive mechanisms lead to oil recovery to a varying degree. Improved recovery methods include all methods for supplementing natural energy or altering natural forces in the reservoir to increase ultimate recovery. If the reservoir pressure is at point 1 then that reservoir is an undersaturated oil reservoir. Tertiary recovery (EOR) There are a range of techniques broadly labelled ‘Enhanced Oil Recovery’ that are applied to reservoirs in order to improve flagging production. A reservoir can also be formed from a natural lake whose outlet has been dammed to control the water level. Examples of such methods are pressure maintenance, cycling, waterflooding, thermal methods, chemical flooding, and the use of miscible and immiscible displacement fluids. Secondary recovery This is recovery aided or driven by the injection of water or gas from the surface. Petroleum, complex mixture of hydrocarbons that occur in Earth in liquid, gaseous, or solid form. A mechanical energy reservoir is a large body which can store work as potential energy. Reservoir Definition. ... Exploration for deep geothermal reservoirs in Luxembourg and the surroundings - perspectives of geothermal energy use, Geothermal Energy, 10.1186/s40517-015-0028-2, 3, 1 , … The term is often restricted to the liquid form, commonly called crude oil, but, as a technical term, petroleum also includes natural gas and the viscous or solid form known as bitumen, which is found in tar sands. Reservoir - Water: a human made structure that stores water in a defined volumetric area, most specifically a hydroelectric reservoir (Figure 2). The dam controls the amount of water that flows out of the reservoir. Primary production of oil or gas reservoirs is obtained at the expense of the natural reservoir energy. Dostyk 282, 050000 ALMATY, Kazakhstan. This large body is covered by an adiabatic wall. Thermal Energy Reservoir - A thermal energy reservoir is a hypothetical body with a relatively large thermal energy capacity (mass times specific heat) that can supply or absorb finite amounts of heat without undergoing any change in temperature. There are two main types of Gas Reservoirs, i.e., lithologic structural gas reservoir and lithologic gas reservoir. energy of the reservoir as a drive. Reservoir energy – the energy of the reservoir bed and of the embedded fluid (oil, water, gas) which are stressed under the effect of rock pressure and reservoir pressure.. Main types of reservoir energy: produced water discharge, free gas and gas emitted when the pressure of the gas dissolved in oil is lowered, compressed formation and fluids tension, discharge energy defined by oil gravity. There are multiple sources of natural energy, including rock and fluid expansion, liberation of dissolved gas, water influx from adjacent aquifers, and gravity. Most reservoirs are formed by constructing dams across rivers. Among the above examples, furnace can not store work as potential energy. Take a look at the phase envelope. So furnace will not be the example of mechanical energy reservoirs. AREVA Business Group Mines, KATCO, Av. A reservoir is an artificial lake where water is stored. What this means is that the reservoir pressure (point 1) is higher than the bubble point pressure. Gas Reservoir is a naturally occurring storage area of natural gas which is contained in fracture or porous rock formations. Patrick Ledru. The bubble point pressure (on the bubble point line) is a very important concept for every oil reservoir. The reservoir rocks are permeable and are made up of sandstones, limestones, and dolomites. 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