Petrophysical Analysis with Petrel

Assess shale volume in reservoirs using porosity, permeability, water saturation, and shale types, applying linear gamma ray index and Larionov Tertiary formulas in Petrel for Niger Delta rocks.

Learn to estimate porosity, the pore volume fraction of rock, from density, neutron, and sonic logs, using matrix and fluid densities, slowness values, and total and effective porosity formulas.

Explore water saturation in rock pore spaces with Archie and Simandoux models, noting shale versus sand zones and deriving formation water resistivity from logs.

Permeability measures how easily fluids flow through pore spaces, with the Tixier model estimating horizontal and vertical permeability across zones using irreducible water saturation.

Review the essential petrophysics formulae on a sheet and revise them online to keep your knowledge fresh for petrophysical analysis with Petrel.

Explore a petrophysics review of lithosphere layers and how drilling tools record multiple measurements—gamma ray, resistivity, neutron porosity, density, and acoustic—producing well logs.

Explore how gamma ray log detects radioactive elements in rocks, distinguishing reservoir from non-reservoir rocks; low gamma ray readings indicate sandstone as reservoir, high readings indicate shale as non-reservoir.

Learn how gamma ray logs distinguish reservoir from non-reservoir rocks by using high readings in shale with radioactive elements and low readings in sandstone, measured in API units.

Analyze the density log, which measures the formation's bulk density in g/cm3, reflecting rock and pore-fluid densities. Gas, oil, and water densities differ, with water-bearing rocks showing higher bulk density.

Understand the acoustic log, its microseconds per foot unit, and interval transit time, showing how wave speed varies with rock type and fluids like water or gas.

Examine neutron log, shown as ft3/ft3, that measures hydrogen index and fluid-filled porosity to differentiate water, oil, and gas, with low hydrogen index yielding higher porosity for gas field rocks.

Combine gamma ray, resistivity, sonic, and porosity logs to distinguish reservoir from non-reservoir and identify gas, oil, and water zones via neutron porosity and bulk density crossovers.

Navigate the Petrel interface, mastering the menu bar, home and tabs, the input tab, templates, reset layout, and the processes pane to guide your workflow from input to reservoir simulation.

Learn to set up a Petrel project for petrophysical analysis by configuring project settings, coordinates reference system, and unit systems, including customized metric and field units and Eclipse simulation units.

Explore the Petrel calculator, focusing on the log calculator to compute porosity, vshale, and other log-based properties for wells, with practical tips and templates.

Explore the petrel well section window and its tools to view logs in 2D and 3D, pick readings, adjust domain, scale, and synchronized scrolling for comparative petrophysical analysis.

Explore the Petrel petrophysics workflow by using the tool palette to access cross-section editing, well correlation, and curve fill for editing well tops and logs.

Learn to import and export in Petrel by using the input tab, selecting file types like well logs and wellheads, and exporting as well event data or OFM masterfiles.

Navigate the Petrel interface, from the menu bar and toolbar to project creation, windows, and input tabs, and use the tool palette for well correlation and cross-section editing.

Explore data files and division data in Petrel, read md and x, y, z coordinates with z in fts, and understand the coordinate reference system for Nigerian projects.

Learn how to load and organize petrophysical data in Petrel, create and save projects, import wellhead data and logs, adjust units, and calibrate measurements for seamless analysis.

Master petrophysical visualization in Petrel by arranging three windows, adjusting grid, coordinates, and units, and confirming data alignment across the views.

Explore 2d and 3d visualization in Petrel by manipulating windows, plots, and views to measure distances and coordinates across wells, with adjustable symbols and labels.

Visualize wells and world logs in the map window, adjusting templates and log colors while setting resistivity, neutron porosity, sonic, and density scales.

Learn practical well correlation using gamma ray, resistivity, sonic and density logs, refine horizons with synchronized scrolling and world tops in Petrel.

Identify reservoir fluids by building neutron porosity versus density cross-plots, color-mapping gas, oil, and water, and painting discrete fluid zones with a brush in petrophysical analysis using Petrel.

Identify faults and assess geology effects on logs to understand reservoir variability across wells, including depth differences and thinning sections, with seismic data guiding interpretations.

We explain how to use camera and wall observations to identify features, display logs, and run neutron crossovers against reservoir to generate a fluid distribution plot using the fluid template.

Compile and organize petrophysical formulae in Petrel, learn to split complex equations into sections, and apply water saturation, porosity, and neutron porosity calculations using power functions.

Use Petro's calculator to compute petrophysical parameters and estimate the volume of shale from logs, employing a visual formula and histogram-based data fitting.

Estimate porosity from density and neutron logs, and compute total and effective porosity using density, neutron, and sonic data for accurate reservoir characterization.

Estimate water saturation from Archie's and Simandou equations, deriving rw from logs, cementation factor and formation factor considerations, then compare resistivity results for quality-checked reservoir assessment.

Export petrophysical data from Petrel to external software by selecting wells, logs, and created properties, and include division data to enable external viewing and further modeling.

Learn to use a Petrel macro to run all your previous calculations with a few clicks, and apply porosity and permeability templates.

Load data inputs and logs, perform petrophysical analysis to identify fluids and create the fluid diagram, then compute total porosity, effective porosity, saturation, and export results for Petrel workflow.