Definition(s)
Abnormal Pressure
Reservoir pore fluid pressure that is not similar to normal saltwater gradient pressure. The term is usually associated with higher than normal pressure, increased complexity for the well designer and an increased risk of well control problems. Abnormal pressure gradients exceed a 10-ppg equivalent fluid density (0.52 psi per foot). Gradients below normal are called subnormal.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Abnormal Pressure
Pore pressure in excess of that pressure resulting from the hydrostatic pressure exerted by a vertical column of water with salinity normal for the geographic area.
Source: API RP 59, Recommended Practice for Well Control Operations, Second Edition, May 2006. Global Standards
Abnormal Pressure
Formation pore pressure in excess of that pressure resulting from the hydrostatic pressure exerted by a vertical column of water with salinity normal for the geographic area.
Source: API RP 64, Recommended Practice for Diverter Systems Equipment and Operations, Second Edition, November 2001 (March 1, 2007). Global Standards