The aperture of the Hydraulic Fracture.
It is usually abbreviated as w_f.
See Also
Petroleum Industry / Upstream / Well / Well-Reservoir Contact (WRC) / Hydraulic Fracture
[ Production / Subsurface Production / Well & Reservoir Management (WRM) / Well stimulation / Hydraulic Fracturing ]
[ Fracture ] [ Infinite conductivity fracture ] [ Finite conductivity fracture ]