The Impact of Landing Depth and Frac Barriers
C-Factor shows when the frac breaks through into better rock.
When the frac is landed more than 20 feet from the S2, it becomes separated from the target by a frac barrier. In those stages there is a distinct pressure breakdown mid-frac. Until now, that event was something engineers could observe but not confidently explain.
What matters here is what happens next: C-Factor, shown in purple, rises rapidly after that pressure breakdown occurs. The interpretation is that the frac has broken through the barrier and grown into the S2, and C-Factor is measuring the resulting increase in fracture area and effective permeability immediately.
Now that the event has meaning, and now that a C-Factor KPI of 3.8 has been established for these wells, the frac company can be directed to continue pumping until the stage is fully stimulated. On the right-hand side, where the well is situated closer to the S2, C-Factor starts higher and ends higher because the frac initiates in the S2, and there is no comparable pressure breakdown on those stages.