In some places, an empirical relation can be established to predict pore pressure from well logs. [[:file:formation-fluid-pressure-and-its-application_fig5-21.png|Figure 2]] shows sonic travel time varying with measured pressure. | In some places, an empirical relation can be established to predict pore pressure from well logs. [[:file:formation-fluid-pressure-and-its-application_fig5-21.png|Figure 2]] shows sonic travel time varying with measured pressure. |