... initiation pressure. The model described in this paper challenges these assumptions by considering a fluid lag at the tip of the hydraulic fracture growing from the pre-existing notches and by incorporating the hydraulic compliance of the injection system. This model indicates that the peak pressure...

... out field tests of hydrofracturing, and then we confirmed that borehole pressure is fairly influenced by the hydraulic compliance of test equipments, C, as expected from our theoretical model which has been developed so far. The model suggests that if the C will be reduced small enough...