What is a consequence if the Maximum Allowable Annular Surface Pressure (MAASP) is exceeded?

Exceeding the Maximum Allowable Annular Surface Pressure (MAASP) has significant implications for the integrity of the well. When this pressure limit is surpassed, the most critical consequence is formation fracturing at the casing shoe. The MAASP is established to prevent pressures from becoming so high that they exceed the strength of the formation surrounding the wellbore. If pressure surpasses this limit, it can result in the fracturing of the formation, which compromises the well's stability and can lead to a loss of control. Fracturing can also create pathways for fluids, including hydrocarbons, to migrate in ways that are uncontrolled and dangerous.

Maintaining pressures below the MAASP is essential not only for the safety and success of the drilling operation but also for protecting the surrounding geological formations and preventing environmental hazards.