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Line 42: + + − − [[file:petroleum-reservoir-fluid-properties_fig1.png|left|thumb|{{figure number|1}}Pressure-temperature phase diagram. Reservoir classification would be ''oil'' if reservoir temperature were less than 127 °F and ''gas'' if reservoir temperature were greater than 127°F.]]
Petroleum reservoir fluid properties (view source)
Revision as of 20:48, 16 January 2014
, 20:48, 16 January 2014→Property definitions
Another common measure of oil specific gravity, defined by γ<sub>API</sub> = (141.5/γ<sub>O</sub>) –131.5, with units in °API.
Another common measure of oil specific gravity, defined by γ<sub>API</sub> = (141.5/γ<sub>O</sub>) –131.5, with units in °API.
[[file:petroleum-reservoir-fluid-properties_fig1.png|left|thumb|{{figure number|1}}Pressure-temperature phase diagram. Reservoir classification would be ''oil'' if reservoir temperature were less than 127 °F and ''gas'' if reservoir temperature were greater than 127°F.]]
===Gas specific gravity===
===Gas specific gravity===
The ratio of density of any gas at standard conditions (14.7 psia and 60 °F) to the density of air at standard conditions; based on the ideal gas law (''pV'' = ''nRT''), gas gravity is also equal to the gas molecular weight divided by air molecular weight (M<sub>air</sub> = 28.97). Denoted mathematically as γ<sub>g</sub> (where air = 1).
The ratio of density of any gas at standard conditions (14.7 psia and 60 °F) to the density of air at standard conditions; based on the ideal gas law (''pV'' = ''nRT''), gas gravity is also equal to the gas molecular weight divided by air molecular weight (M<sub>air</sub> = 28.97). Denoted mathematically as γ<sub>g</sub> (where air = 1).
===Bubblepoint pressure===
===Bubblepoint pressure===