Pad drilling
From Wikimarcellus
When multiple wells are drilled from the same pad, it is often referred to as pad drilling. Typically 6 or 8 horizontal wells may stem from the same pad.
Typically the land required for a well pad is rectangular--usually about one half mile wide by two miles long with the pad itself positioned in the center of the rectangle.
Pad drilling is often accomplished through the use of a movable flex rig.
The intent is to drill as many wells on a pad as are economically feasible.