Applying fluid removal/fluid pressure in a geomechanical model
Applying fluid removal/fluid pressure in a geomechanical model
(OP)
Hello
I am trying to model a production well in Abaqus FE. The setup is for now a simple geometry of three horizontal pore pressure layers. To model the removal of the fluid I am using a concentrated pore fluid load at a node (or group of nodes) in the middle layer. According to the abaqus manual (16.9.21 of CAE user's manual) the unit of the magnitude of this load is LT-1. In my case that would be m/s. My problem is that is have no clue what the relationship is between the volume (m3/s) of fluid removed and the value of this magnitude (m/s). Any help on this would be much appreciated.
If you know another way to model fluid removal from a section, that would probably help me out as well.
Thanks in advance
I am trying to model a production well in Abaqus FE. The setup is for now a simple geometry of three horizontal pore pressure layers. To model the removal of the fluid I am using a concentrated pore fluid load at a node (or group of nodes) in the middle layer. According to the abaqus manual (16.9.21 of CAE user's manual) the unit of the magnitude of this load is LT-1. In my case that would be m/s. My problem is that is have no clue what the relationship is between the volume (m3/s) of fluid removed and the value of this magnitude (m/s). Any help on this would be much appreciated.
If you know another way to model fluid removal from a section, that would probably help me out as well.
Thanks in advance





RE: Applying fluid removal/fluid pressure in a geomechanical model
The answer is that the load applied here is a flux (q) (and not a 'velocity' as I first assumed) which has units (m3/s)/m2 = m/s. Abaqus assumes unit area then applies darcy's law [1] to convert this flux to a pressure gradient, which is used when running the model. Using the same assumption of unit area, your volume discharge Q (m3/s) is equal to q.
[1]http://en.wikipedia.org/wiki/Darcy%27s_law