1. n. [Formation Evaluation]

The volume of hydrocarbons per unit volume of rock that can be moved on production, measured in volume/volume or porosity units. Typically only primary and secondary production methods are considered when estimating moveable hydrocarbons. Moveable hydrocarbons are not necessarily the same as moved hydrocarbons, which are those hydrocarbons that have been moved by invasion.

See: flushed-zone water saturation,  moved hydrocarbons,  residual oil,  water saturation