Half of the total length of the hydraulically induced vertical plane fracture .
For the fractured vertical well the geometrical skin-factor S_G is related to Fracture half-length X_f as:
(1) | S_G= -\ln \left(\frac{X_f}{2\, r_w} \right) |
See Also
Petroleum Industry / Upstream / Well / Well-Reservoir Contact (WRC)