In many of today's high cost offshore areas, overpressured zones present significant challenges to optimizing the drilling process. Operators face a number of costly risks, including reduced rate of penetration (ROP); formation damage due to high mud weight; and health, safety, and environmental (HSE) risks associated with loss of well control.

Operators commonly rely on logging while drilling (LWD) resistivity data and an overburden gradient to identify overpressured zones. The overburden pressure gradient is usually derived from offset density/acoustic data, seismic velocities, or regional overburden tables adjusted for water depth and air gap. One drawback of using only the resistivity-based...

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