- Industry: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
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Gas produced from a relatively impermeable reservoir rock. Hydrocarbon production from tight reservoirs can be difficult without stimulation operations. Stimulation of tight formations can result in increased production from formations that previously might have been abandoned or been produced uneconomically. The term is generally used for reservoirs other than shales. <br>
Industry:Oil & gas
Gas injected into a gas-condensate reservoir to maintain the pressure level, thus preventing further condensate dropout.
Industry:Oil & gas
Gas mainly composed of propane and butane, which has been liquefied at low temperatures and moderate pressures. The gas is obtainable from refinery gases or after the cracking process of crude oil. <br><br>Liquefied petroleum gas is also called bottle gas. At atmospheric pressure, it is easily converted into gas and can be used industrially or domestically. The term is commonly abbreviated as LPG.
Industry:Oil & gas
Gas condensate comprising significant amounts of heavy hydrocarbon products, which can produce relatively large volumes of condensate.
Industry:Oil & gas
Formation with rock properties that do not change with location in the reservoir. This ideal never actually occurs, but many formations are close enough to this situation that they can be considered homogeneous. Most of the models used for pressure-transient analysis assume the reservoir is homogeneous.
Industry:Oil & gas
Formation water with low salinity. Water is considered fresh when its low conductivity makes the interpretation of resistivity logs difficult. The salinity at which this becomes important depends on temperature and clay content, among other factors, but is generally somewhere less than 10 ppk.
Industry:Oil & gas
Formation with rock properties changing with location in the reservoir. Some naturally fractured reservoirs are heterogeneous formations.
Industry:Oil & gas
For a two-detector density tool, the plot of long-spacing versus short-spacing count rates for different formation densities, mudcake densities and mudcake thicknesses. The plot takes its name from the spine, which is the locus of points with no mudcake, and the ribs, which show the effect of mudcake at certain fixed formation densities. The plot illustrates graphically that for a given formation density there is only one rib for all normal mudcake densities and thicknesses. Thus, although there are three unknowns, it is possible to make a correction using two measurements.
Industry:Oil & gas
Following a surface shut-in, the flow into a well caused by the compressibility of the fluids in the wellbore. Most of the flow occurs from compression of gas in the wellbore. The practical result is that the sandface flow rate is not zero and, therefore, not constant. This gives rise to one form of the wellbore-storage effect.
Industry:Oil & gas
Fluid pressure in the annulus between tubing and casing or between two strings of casing.
Industry:Oil & gas
