This answer product deliverable provides the client with a complete interpretation to assist with geological, petrophysical and geomechanical analysis.
Input logs are a standard triple combo.
Acoustic compression slowness, and PE for lithology, are modeled using neural networks based on log responses from offset wells.
Zone Grader "cutoffs" are based on advanced petrophysical analysis performed in offset wells.
Zone Grader Component Outputs:
Shale Volume - Index of Brittleness
Porosity - Water Saturation
Resistivity - Permeability
Organic Shale (TOC) - Net Pay
Closure Stress (used as an input for Zone Tuner)
Zone Grader - Deliverable Example - Click to Enlarge
Zone Grader - Assumptions to Flag Pay
Clay Volume must be low.
Reservoir rocks are usually more brittle than the surrounding shales. The Index of Brittleness highlights the more brittle rocks.
There needs to be some porosity for reservoir storage.
Water saturation is shown as being below a threshold for a low water cut completion.
The permeability cutoff to indicate reservoir rock that has the potential to flow commercial rates.