From the previous article, you’ve learnt about overall of casing design process and in this article we are going to discuss about how to select casing setting depth. The selection of casing string and setting depth is based on formation pore pressure and fracture gradient of the well.
For the casing setting depth determination, pore pressure and fracture gradient are normally described in PPG (Figure 1).
Figure 1 – Pore Pressure and Fracture Pressure Plot
