GeolOil was designed from the beginning to handle variable matrix properties. Any "constant" parameter in any equation can be a curve in its own right. The Sequential Petrophysical Functions Workflow module has a large built-in set of 127 classic pre-defined equations and correlations for:

As an example consider a case of a clastic reservoir where the interpreter decides to change the reference GR value for clean sandstones (or use a variable curve instead of a constant). Then the sequence to update the water saturation curve with a single click must follow four calculations in the chained sequence:

• Update the linear Gamma Ray index curve (IGR) to account for the updated clean sandstone GR value or variable curve.
• Update a possible non linear Vshale model like Larionov, which depends on the updated curve of IGR.
• Update the effective porosity for its change in VSH.
• Update the effective shale corrected water saturation model SW like Simandoux, which depends upon VSH and PHIE.

The main function panel list

The panel to define the computed output curve

Some predefined functions for porosity

A log display with the updated petrophysical interpretation

A full functions work-flow interpretation for a clay mineral solver

The log display of the clay mineral solver from the above work-flow

	Related articles: How to plot LAS files well logs with GeolOil How to edit LAS files with GeolOil
	Related video: How to define a workflow of petrophysical functions

GeolOil is listed by the official SPWLA software directory

© 2012-2024 GeolOil LLC. Please link or refer us under Creative Commons License CC-by-ND