Pore Pressure Measurement and Prediction

You will learn how to:

• Identify the significance of pore pressure in subsurface operations such as drilling, completion, production, etc.
• Define pore pressure in porous rock and describe the mechanical interaction between the rock matrix and fluid and explain the concept of effective stresses
• List different pore pressure regimes and explain their differences
• Recognize and explain different mechanisms that result in overpressure regimes including stress-induced, uplift, buoyancy and pressure difference, and fluid generation and fluid expansion mechanisms
• Identify and describe natural and artificial mechanisms that result in underpressure regimes
• List different methods used for pressure detection and prediction including pre-drilling, while-drilling and after-drilling methods
• Describe the fundamentals of pore pressure measurement using well testing
• Recognize the influence of pore pressure on different rock properties, petrophysical logs and seismic attributes that can be implemented for identifying overpressuring
• Explain the influence of high pore pressure on different rock properties such as porosity, density, wave velocities, and resistivity
• Explain basic equivalent depth and ratio methods to estimate overpressuring from petrophysical logs
• Explain how drilling indicators (e.g., kicks, tight spots, gas shows, etc.), rock cavings and drilling rate are used for estimation of pore pressure
• Explain the challenges of pore pressure prediction in unconventional plays