Case 2 Over-consolidated porosity trend

 

To perform this exercise modify the porosity trend to impose an over-consolidated state in such a way that the porosity at each depth is 0.8 times the porosity on the Normal Compaction Trend (porosity in uniaxial burial under hydrostatic conditions). Because for a given depth the porosity will be lower than the expected for the current material under uniaxial burial and hydrostatic conditions, the pre-consolidation pressure will initialize with values larger than the vertical effective stress (overconsolidated state).

 

The data file for this exercise is located in directory: geost_001\Exercises\Case 2\Data. Look for ! TODO  text in the datafile and follow the instructions.

 

Data File

 

 

* Spatial_variation_values    NUM=1

! ---------------------------------

 Description  "Overconsolidated Porosity Trend"

 Time                        0.0

 Values_vs_depth     IDM=35 JDM=2

/Depth/        0                179.3     ...  6097.4

/Porosity/        0.390672        0.357736  ...  0.0316184

 

Geost_001_Case2_Results

Over-consolidation ratio (ratio between the pre-consolidation pressure and vertical effective stress) after geostatic initialization

 

The result files for the project are in directory: geost_001\Exercises\Case 2\Results