I am trying to create a geomechanical model to simulate a wellbore in shale.  I have created a simplistic open hole within rock with principal stresses to first verify the stresses within the open hole of the model.  The Ansys results and the theoretical results agreed (within 0.5% due to large mesh), so now I am trying to add pore pressure to it.  I have read sections 4.3 and 4.9 of the Mechanical APDL manual, but I am still having trouble.  

I copied the code listed in section 4.3.1 (with my parameters), but the results are not lining up with my calculations.

Do I need to also change the element type (to say CPT216)?

I attached my model if anyone wants to look at it.

I am using Ansys 17.0.

Any help with this is greatly appreciated.