Published online by Cambridge University Press: 04 March 2021
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.