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Collective term for
oil, condensate and natural gas and their mixtures, normally encountered in subsurface reservoirs.

Its composition is dominated by pure hydrocarbons (usually AlkanesNaphthenesAromatics, Asphaltics) and may also include the other organic and inorganic chemical substances (like carbon dioxidenitrogenhydrogen sulfidehelium etc.).


Table 1 – Example of composition of several Petroleum Hydrocarbon (in mol % )

SubstanceDry GasWet Gas Condensate Volatile OilBlack Oil
CO20.101.412.371.820.02
N22.070.250.310.240.34
C186.1292.4673.1957.6034.62
C25.913.187.807.354.11
C33.581.013.554.211.01
i C41.720.280.710.740.76
n C4
0.241.452.070.49
i C50.500.130.640.530.43
n C5
0.080.680.950.21
C6s
0.141.091.921.16
C7+
0.828.2122.5756.40
Rs  (SCF/STB)69,00059651465320
Rv  (STB/MMSCF)0151656803125
API gravity
65.048.536.723.6
M7+
132184240274
γ7+
0.7500.8160.8640.920


See Also


Petroleum Industry / Upstream / Subsurface E&P Disciplines / Petroleum Geology / Petroleum Reservoir Fluids




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