Petrel Well Log Analytics: Petrophysical Calculations Guide

Explore petrophysical analysis with the log calculator, inspect well logs, configure a 2d visualization, create templates and tracks, and auto-set log scales from min to max.

Learn to set up a Petrel log template by adjusting track settings, log limits, colors, and line types, then add resistivity, neutron, density, and sonic logs with crossover filling.

Display multiple wells on the same template by selecting wells, set a fixed vertical scale, and adjust spacing for clear log visuals. Flatten formation tops to align logs across wells.

Master petrophysical analysis by calculating shale volume, porosity, and water saturation from gamma ray, neutron-density, sonic, and resistivity logs. Apply these calculations to single or multiple wells.

Calculate the shale volume (Vshale) using the gamma ray index method with GR, GR minimum, and GR maximum, and implement the calculation in Petrel across wells.

Calculate density porosity from density log using matrix and bulk densities and fluid density, then supplement with sonic and neutron porosities, and compute the average porosity across wells.

Compute water saturation with Archie's equation using porosity, formation resistivity, tortuosity factor, rw 0.25, and set m and n to 2; convert Sw to hydrocarbon saturation.

Learn to apply cutoffs to distinguish shale from sand, create reservoir flags from ROC and porosity thresholds, and compute net pay using water saturation on global well logs.

Display all logs, compute shale volume from gamma ray, estimate porosity from density, neutron, and sonic data, and derive water saturation to identify net-pay zones with cutoffs.