A Deepwater Pore Pressure Risk Management Case In Offshore Brazil

A well was planned as the first in the deepwater<br>Cumuraxitiba basin offshore Brasil. The well casing<br>and the mud program were designed for abnormal<br>pressure based on risk from offset wells on the shelf<br>and a seismic velocity model. Interval probability<br>analysis illustrated an opportunity to decrease the<br>uncertainty of this risk.<br>Basin modeling and seismic tomography were<br>performed and uncertainty was reduced, pointing to<br>the probability of a normally pressured well. The well<br>design was altered reducing cost, and the subsequent<br>drilling of the well has confirmed the normal pressure prediction.