Detection of Overpressured Formations During Drilling Operations in World-Wide Environments

Abnormal Pressure can be detected during drilling operations in world-wide environments. Five practical detection tools: rate of penetration, shale densities, "d" exponent, flowline temperature and pseudo-porosity have been used for this purpose. Actual formation pressures have been predicted in certain instances. Some, or all of these tools were utilized in the U.S. Gulf Coast, African area, Southeast Asia and the North Sea.