Shg 1D Lithology

From a set of drilling, a mean lithological log is computed.
Each layer of the log has a set of properties mean values..

Supported drilling kinds are :

• penetrometer (DPT),
• pressuremeter (PMT).

Supported layer property kinds are :

• for penetrometers : Q_d,
• for pressuremeters : E_m, P_l^*.

Mean values correspond to :

• arithmetic mean for Q_d,
• geometric mean for P_l^*,
• harmonic mean for E_m.

Usage of this plugin assumes that:

• layers with Q_d, P_l^* et E_m mean values could be defined,
• a simple geological model (1D) could be used. Three cases are handled by the plugin :
  • horizontal layers with all drillings at the same elevation (1).
  • horizontal layers with different drilling's elevations (2).
  • layers with a constant thickness at least at drilling location (3).

Limitation of a 1D lithology : more complex geological models (case 4) are not handled.

Different kinds of geological models.

Input data

Plugin input data are wells of two kinds : penetrometers (at the bottom left corner) and pressuremeters (at the right hand). These wells are geolocalized on Earth viewer (at the top right corner).

Plugin usage

The last page of the wizard has a set of chart. From left to right :

• a lithological set,
• a chart with E_m values (pressuremeters),
• a chart with P_l^* values (pressuremeters),
• a chart with Q_d values (penetrometers).

On E_m, P_l^* et Q_d charts, mean values are displayed for each layer, if they could be computed.

Result

Lithological log is saved, output layers are saved and mean values are displayed.