Petrophysics & Logs
11 petrophysics workflows for LAS QA, log viewing, Vshale, net pay, Archie saturation, Pickett, N-D crossplots, and multi-well comparison. Petrophysicists can turn raw curves into cutoff tables and pay summaries with the assumptions visible.
▶ Try the Well Log Viewer live with sample data — no signup required
What it solves
Turn raw logs into auditable reservoir properties
A pay interpretation can change when 5 inputs drift: LAS quality, mnemonic mapping, Vshale method, net-pay cutoff, and saturation equation. This suite keeps those assumptions visible so petrophysicists and reservoir engineers can audit how curves became pay, phi, Sw, and volumetric inputs.
Use it to inspect LAS files, calculate Vshale and net pay, build Pickett and N-D crossplots, estimate Archie saturation, and prepare multi-well QA. The workflows help teams move from raw logs to cutoff tables, pay summaries, and crossplots before static models or reserves maps are updated.
Who it's for
- Petrophysicists building Vshale, porosity, Sw, and net-pay interpretations across wells
- Reservoir engineers validating cutoff tables before volumetrics, maps, and reserves updates
- Geoscience teams standardizing LAS mnemonics and comparing type logs across fields
What you can do
Quality-check LAS data and calculate the petrophysical properties that feed pay, volumetrics, and reservoir models.
QA raw LAS files
Inspect curves, units, nulls, depth ranges, and mnemonic consistency before interpretation starts.
Calculate shale volume
Apply gamma-ray and shale corrections to build consistent Vshale curves for clean and shaly intervals.
Define net pay
Combine Vshale, porosity, saturation, and thickness cutoffs into transparent pay summaries.
Estimate water saturation
Use Archie and shaly-sand methods where valid, with documented constants and assumptions.
Build diagnostic crossplots
Use Pickett, type-log, and N-D crossplots to reveal lithology, fluid, and cutoff behavior.
Compare wells consistently
Prepare multi-well LAS comparisons and standard mnemonic mapping for field-scale interpretation.
Support volumetrics
Generate auditable petrophysical inputs for net-to-gross, porosity, Sw, and hydrocarbon pore volume.
Export interpretation packages
Create report-ready outputs for reservoir, geoscience, and reserves review.
Included workflows
Click any workflow to see its inputs, outputs, methodology, and worked examples.
Standard workflows
Well Log Viewer
▶ TRY LIVELoad sample log data, inspect tracks, and review curve context in the live flagship demo.
Well Log Calculator
🔒 PREVIEWCompute petrophysical curves from raw log data and selected interpretation constants.Unlock the Petrophysics & Logs Suite to run with your data.
Vshale
🔒 PREVIEWCalculate shale volume from gamma-ray and related log responses.Unlock the Petrophysics & Logs Suite to run with your data.
Net Pay
🔒 PREVIEWApply porosity, saturation, Vshale, and thickness cutoffs to summarize pay.Unlock the Petrophysics & Logs Suite to run with your data.
Pro workflows
Pickett Plot
🔒 PREVIEWUse well log calculator inputs to produce a documented engineering result for review.This workflow is part of the Petrophysics & Logs Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Type Log
🔒 PREVIEWConvert log and interpretation assumptions into auditable petrophysical outputs.This workflow is part of the Petrophysics & Logs Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
N-D Crossplot
🔒 PREVIEWConvert log and interpretation assumptions into auditable petrophysical outputs.This workflow is part of the Petrophysics & Logs Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Archie Saturation Calculator
🔒 PREVIEWEstimate water saturation from porosity, resistivity, and Archie constants.This workflow is part of the Petrophysics & Logs Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Coming soon
Multi-Well LAS Comparison
🔒 PREVIEWUse type log inputs to produce a documented engineering result for review.Unlock the Petrophysics & Logs Suite to run with your data.
Batch LAS QA
🔒 PREVIEWRun multi-well LAS quality checks for nulls, units, mnemonics, and depth coverage.Unlock the Petrophysics & Logs Suite to run with your data.
Advanced Mnemonic Standardization
🔒 PREVIEWStandardize curve names across vendors and fields before petrophysical interpretation.Unlock the Petrophysics & Logs Suite to run with your data.
Exportable Petrophysics Report
🔒 PREVIEWCreate a report-ready petrophysics package with curves, cutoffs, and pay summaries.Unlock the Petrophysics & Logs Suite to run with your data.
🔒 Preview tools show problem statement, sample output, and inputs summary. Unlock the suite to run with your data.
Sample scenarios
Net-pay cutoff review before reserves update
A petrophysicist imports LAS files, checks curve quality, then calculates Vshale and net pay using agreed cutoffs. Pickett Plot and Archie Saturation Calculator validate whether the saturation assumptions fit the clean intervals. The reserves team receives a consistent pay table with documented constants and validity limits.
LAS standardization across an acquired field
A geoscience team receives wells with inconsistent mnemonics, depth ranges, and missing curves. Well Log Calculator and Type Log establish the interpretation baseline, while the coming multi-well QA workflows identify outliers for review. The field model starts from a cleaner petrophysical dataset.
Methodology
Built on validated petroleum engineering correlations
Petrophysics workflows use Archies equation, gamma-ray Vshale methods, net-pay cutoff logic, Pickett-plot interpretation, Wyllie time-average concepts, density-neutron and N-D crossplot diagnostics, Indonesian and Simandoux shaly-sand saturation equations where applicable, and LAS QA practices for curve standardization.
Every formula and worked example is documented at tools.petropt.com/docs. Click any workflow above to see its citation and validity range.
Frequently asked questions
Can I use custom cutoffs and Archie constants?
Yes. The workflows are built around explicit cutoffs and constants so users can match local rock, fluid, and log conditions. The output should be reviewed against core, tests, mud logs, and regional interpretation standards before reserves use.
Can I try before buying?
Yes. Run the public sample workflow above with our sample data. To use your own data, save runs, and export reports, you'll need a Standard subscription.
What's the difference between Standard and Pro?
Standard covers single-well, single-run analyses with saved results and standard exports. Pro adds advanced workflows such as batch analysis, probabilistic outputs, type curves, Monte Carlo, advanced reports, and priority support where those workflows are available for the suite.
Is my data private?
Yes. Uploaded files and saved runs are scoped to your account, encrypted in transit with HTTPS and at rest in Supabase Postgres. We do not share or sell your data. Enterprise customers can opt for private workspace deployment with private workflows.
Choose your plan
Standard
$99/mo
per user
- 6 workflows included:
- Well Log Calculator
- Vshale
- Net Pay
- Porosity Calculator
- Archie Sw
- Permeability Estimator
- + flagship demo: LAS Viewer & Log QA
Real data input & file upload
Saved runs & exports (CSV, PDF)
Email support from Groundwork Analytics
Maintenance & feature requests
Pro
$199/mo
per user
- Everything in Standard, plus:
- Pro-only workflows:
- Pickett Plot
- Type Log
- N-D Crossplot
- Archie Saturation Calculator
- Multi-Well LAS Comparison (coming soon)
- Batch LAS QA (coming soon)
- Advanced Mnemonic Standardization (coming soon)
- Exportable Petrophysics Report (coming soon)
Multi-well LAS comparison and batch QA workflows
Larger uploads for curves, mnemonics, and well sets
Pickett, N-D, Archie, and report exports
Priority support for reserves and model updates
Enterprise
Custom
annual contract
- Everything in Pro
- Team seats (3+ users)
- API access & data connections
- Custom workflow development
- Dedicated engineering hours
- SLA & priority onboarding
- Multi-suite bundles
Need help choosing a suite?
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