Book contents
- A Concise Guide to Geopressure
- A Concise Guide to Geopressure
- Copyright page
- Contents
- Acknowledgments
- Nomenclature
- 1 Introduction
- 2 Reservoir Pore Pressure
- 3 Mudrock Material Behavior
- 4 The Origins of Geopressure
- 5 Pore Pressure Prediction in Mudrocks
- 6 Pore Pressure Prediction: Unloading, Diagenesis, and Non-Uniaxial Strain
- 7 Pressure and Stress from Seismic Velocity
- 8 Overburden Stress, Least Principal Stress, and Fracture Initiation Pressure
- 9 Trap Integrity
- 10 Flow Focusing and Centroid Prediction
- 11 Flow Focusing, Fluid Expulsion, and the Protected Trap
- References
- Index
6 - Pore Pressure Prediction: Unloading, Diagenesis, and Non-Uniaxial Strain
Published online by Cambridge University Press: 04 March 2021
Book contents
- A Concise Guide to Geopressure
- A Concise Guide to Geopressure
- Copyright page
- Contents
- Acknowledgments
- Nomenclature
- 1 Introduction
- 2 Reservoir Pore Pressure
- 3 Mudrock Material Behavior
- 4 The Origins of Geopressure
- 5 Pore Pressure Prediction in Mudrocks
- 6 Pore Pressure Prediction: Unloading, Diagenesis, and Non-Uniaxial Strain
- 7 Pressure and Stress from Seismic Velocity
- 8 Overburden Stress, Least Principal Stress, and Fracture Initiation Pressure
- 9 Trap Integrity
- 10 Flow Focusing and Centroid Prediction
- 11 Flow Focusing, Fluid Expulsion, and the Protected Trap
- References
- Index
Summary
In Chapter 5, I described how to predict pressure from a single normal compaction trend (NCT). Given the porosity, a compaction trend, and the total vertical stress, the pore pressure is determined (e.g., Eq. 5.2). This is a simple way to predict pressure that is useful, fast, and intuitive. Unfortunately, it does not successfully predict pressure in many settings. This is illustrated in Figure 5.4 where the normal compaction trend approach underpredicts the observed pressures.
- Type
- Chapter
- Information
- A Concise Guide to GeopressureOrigin, Prediction, and Applications, pp. 123 - 141Publisher: Cambridge University PressPrint publication year: 2021