Calculating Bowers pore pressure

From the Bowers Unloading form (1D MODEL > Pore Pressure > Bowers Method) you can define the Bowers U empirical parameter for the unloading section and calculate the final Bowers Unloading pore pressure log. As defined in the Bowers Method, the U parameter is as a measurement of the sediment plasticity. A value of 1 represents a perfectly elastic material, and larger values indicate plasticity. This parameter can be automatically determined if calibration points below TVD max are available. Otherwise, you can manually specify the U parameter based on information from offset wells. After establishing the U parameter, the calculation is made and the resulting pore pressure becomes available as the Pore Pressure, Bowers Unloading log. You can use the different options in the form to analyze the log in different views.

1. If you want to use a hydrostatic pore pressure down to a certain depth, check the Use Hydrostatic pore pressure down to box and then select the TVDSS depth.
2. To calculate the pore pressure, click (Re)Calculate. The resulting log, Pore Pressure, Bowers Unloading, is calculated and its name is displayed in the text field below.
To change the default name of the created log, double click in the log field. The background turns blue, indicating you can edit the text. When done, click the green check mark to apply the changes.
3. With the Bowers pore pressure calculated you can analyze the result in the Bowers Method view, the Pore Pressure Prediction view and on the Velocity vs. Effective Stress cross plot. Click the Show button that corresponds to the view of interest; when the view opens the Bowers pore pressure log is added to the view.