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Flowrate of a given fluid component or pseudo-component measured at separator


Whenever is used the fluid component / pseudo-component for which the surface flowrates is measured should be explicitly specified to avoid confusion, for example:


ExpressionSymbolMeaning
Oil production rate

q_O

Surface flowrate of total production of oil from all produced fluid phases measured at SPE Standard Conditions (STP).

Separator measurement of total production of oil from all produced fluid phases

Gas production rate

q_G

Separator measurement of total production of gas from all produced fluid phases
Water production rate

q_W

Separator measurement of total production of water from all produced fluid phases
Liquid production rate

q_{LIQ}

= q_O + q_W

Water injection rate

q_{WI}

Separator measurement of total water injection
Gas injection rate

q_{GI}

Separator measurement of total gas injection


The surface flowrates are also used to calculate the total sandface flowrate at downhole conditions.


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