1. n. [Geology]

The phase that occurs after successful exploration and development and during which hydrocarbons are drained from an oil or gas field.

See: appraisal,  development,  exploration,  licensing round,  retrograde condensation,  scout,  scout ticket,  subsalt,  time-lapse seismic data,  underpressure,  virgin pressure

2. n. [Geophysics]

A measure of the efficiency of seismic acquisition. Production can be expressed in terms of the number of lines, shots or lengths (km or miles) of data acquired in a given time.