Pore Pressure

Pore Pressure Section

Well Planning Report

The Pore Pressure section uses a spreadsheet to define the pore pressure profile as a function of true vertical depth.

The Current Wellbore/Design picklist identifies the active wellbore/design for the data displayed in this section.

This section displays information for the wellbore/sidetrack selected in the Current Wellbore/Design picklist. Changing the selected wellbore/sidetrack updates the information displayed in the section.

Note: This section is read-only when the associated Design is locked or another application has the Design open.

For information on using spreadsheets, see the Using Spreadsheets and Tables topic.

Click the Add Row () button to add a row to the Pore Pressure spreadsheet.
Enter a pore pressure point.
Enter the TVD and a value in the Pore Pressure or Equivalent Mud Weight (EMW) cell. If you set or change a value in the Pore Pressure cell, the equivalent EMW cell will be automatically re-calculated.
Repeat steps 1 to 3 for each Pore Pressure point in the profile.

The Pore Pressure fields are read-only for the first row only. Pore pressure for this initial point is calculated as follows to determine the first point where the Well enters the formation:

For land wells: Earth starts at Elevation (ft)
For offshore wells: Earth starts at Elevation (ft) + Water Depth (ft)

TVD

The TVD field specifies the vertical depth to the top of the layer. This layer is used for well TD if well TD is deeper than the last specified layer.

Pore Pressure

Pore pressure values specified are used to calculate external loads on the casing and internal pressure for drilling and production load cases for casing design. It is also shown in various planned versus actual pore pressure and hydraulics plots.

When a value is entered or edited in the Pore Pressure field, the Equivalent Mud Weight (EMW) is automatically recalculated.

EMW

Specify the linear hydrostatic pressure gradient measured from the reference point, which results in the pressure experienced at a particular depth in a well. If you set or change EMW, Pore Pressure will automatically be re-calculated.

Locked check box

The Locked check box appears at the bottom of the Pore Pressure section. This check box indicates whether the associated Design has been locked. If activated, the Design is locked and the fields in the section can no longer be modified. A Design can be locked or unlocked through the Design Properties dialog accessed through the Engineer's Desktop™ applications, such as PROFILE™, COMPASS™, CasingSeat™ and StressCheck™.