When wellbores are deviated or are located in tectonically active areas it is unlikely that the plane of the wellbore and an artificial hydraulic fracture will be co-incident. This could result in limited entry effects due to poor communication between the wellbore and the hydraulic fracture or the presence of multiple fractures, and hence in a reduced well productivity.

A combined experimental and theoretical study has been carried out to investigate the influence of key parameters on the fracture-wellbore communication, aiming to identify the potential problem wells and to aid in optimising completion procedures for a North-Sea gas field.

The hydraulic fracture treatments were successfully placed, though the fluid friction experienced over the perforations during the treatments did show a dependence on well orientation (indicative that a minor form of limited entry was occurring).

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