1. n. [Geophysics]

The location, acquisition and processing parameters, and other pertinent information attached to a well log, seismic record and traces.

See related terms: parameter,  seismic record,  seismic section,  well log

2. n. [Production Facilities]

In a gathering system, a pipe arrangement that connects flowlines from several wellheads into a single gathering line. A header has production and testing valves to control the flow of each well, thus directing the produced fluids to production or testing vessels. Individual gas/oil ratios and well production rates of oil, gas and water can be assigned by opening and closing selected valves in a header and using individual metering equipment or separators.

See related terms: flowline,  gathering lines,  gathering system,  separator,  wellhead