Real-Time Pore Pressure Detection: Indicators and Improved Methods

Figure 4

Real-time pore pressure detection from LWD resistivity. (a) shows the real-time gamma ray and shale lines; (b) presents the resistivity (red curve), picked shale resistivity (green curve), and NCT (red line); (c) plots the real-time calculated pore pressure (green curve), ECD, and drilling events (overpull, well influx, and mud gas indicators).

(a)

(b)

(c)