How far, is it reasonable to estimate the in-situ permeability in fractured reservoirs using Injection / Fall-off tests?

Which additional feature is expected to play a key role in deciding the intensity of the measured permeability?

Whether pressure-build-up tests or static gradient surveys have any specific restrictions associated with a fractured reservoir - in the context of estimating the average reservoir pressure?

Whether flowing gradient survey or using permanent down-hole gauge have any specific restrictions associated with a fractured reservoir - in the context of estimating the flowing bottom-hole pressure?