Reservoir Engineering
31 reservoir workflows for engineers moving from well-level decline fits to field-level reserves cases. Run DCA, IPR, material balance, P/Z, type curves, and recovery-factor checks with outputs built for review tables, not screenshots.
Pro ($1000/mo) includes the orchestrated Reserve Estimation Workflow.
▶ Try the Decline Curve Analyzer live with sample data — no signup required
What it solves
Turn reservoir uncertainty into defensible development decisions
Reservoir teams have to reconcile at least 6 evidence streams before they defend a reserves change: pressure history, PVT, production decline, contacts, drive mechanism, and recovery factor. This suite keeps those calculations close enough that engineers can check the chain from raw well data to EUR, OOIP/OGIP, and remaining reserves without rebuilding the same workbook each month.
Use it when the asset team needs a defensible answer before a simulator run: fit decline models, compare material-balance plots, test waterflood response, and rank recovery cases. Output stays engineering-native: per-well forecasts, residuals, pressure diagnostics, recovery ranges, and assumptions that survive a review meeting.
Who it's for
- Reservoir engineers updating 100-5,000 well PDP forecasts, type wells, and pressure-surveillance tables
- Asset managers comparing 3-10 development cases with EUR, recovery factor, and capital timing visible
- A&D and M&A analysts testing seller EUR, drive support, and PV sensitivity before bid deadlines
What you can do
Build a connected reservoir view from fluid properties and pressure history through forecasts, material balance, and recovery scenarios.
Forecast producing wells
Fit decline behavior, compare EUR cases, and document assumptions before reserves or budgeting meetings.
Screen drive mechanisms
Combine pressure, PVT, aquifer support, and recovery factor indicators to distinguish depletion, water drive, and gas expansion behavior.
Estimate hydrocarbons in place
Run volumetric checks and contacts sensitivities when seismic maps, petrophysical cutoffs, or fluid contacts are changing.
Plan waterflood response
Evaluate mobility, breakthrough tendency, and sweep assumptions before committing injector conversions or pattern changes.
Normalize PVT inputs
Calculate gas compressibility, bubble point, formation volume factors, and viscosity inputs used across reservoir workflows.
Benchmark EUR ranges
Compare deterministic forecasts with probabilistic outputs and distribution views for reserves and acquisition diligence.
Included workflows
Click any workflow to see its inputs, outputs, methodology, and worked examples.
Standard workflows
Decline Curve Analyzer
▶ TRY LIVEAnalyze production decline with sample data and review forecast assumptions in the live flagship demo.
PVT Calculator
DocsEstimate black-oil properties used by material balance, forecasts, and inflow calculations.
Material Balance
DocsEstimate hydrocarbons in place and drive support from pressure, production, and PVT history.
Buckley Leverett
DocsScreen immiscible displacement, fractional flow, and waterflood breakthrough behavior.
Aquifer Influx
🔒 PREVIEWUse pvt calculator inputs to produce a documented engineering result for review.Unlock the Reservoir Engineering Suite to run with your data.
Drainage Radius
🔒 PREVIEWEstimate contacted reservoir area from permeability, time, and pressure response assumptions.Unlock the Reservoir Engineering Suite to run with your data.
Reserves Volumetric
🔒 PREVIEWCalculate OOIP or OGIP from area, thickness, porosity, saturation, and formation volume factor.Unlock the Reservoir Engineering Suite to run with your data.
Reservoir Pressure
🔒 PREVIEWCalculate pressure behavior and operating limits from the available engineering inputs.Unlock the Reservoir Engineering Suite to run with your data.
Permeability Estimator
🔒 PREVIEWUse reservoir pressure inputs to produce a documented engineering result for review.Unlock the Reservoir Engineering Suite to run with your data.
Skin Factor
🔒 PREVIEWQuantify near-wellbore damage or stimulation effect from pressure and rate data.Unlock the Reservoir Engineering Suite to run with your data.
Fluid Contacts
🔒 PREVIEWCheck oil-water and gas-oil contacts against structure, pressure, and log evidence.Unlock the Reservoir Engineering Suite to run with your data.
Eor Screening
🔒 PREVIEWScreen reservoirs for EOR method fit using fluid, rock, depth, and temperature criteria.Unlock the Reservoir Engineering Suite to run with your data.
Waterflood Predictor
🔒 PREVIEWEvaluate water, injection, or disposal behavior for surveillance and development decisions.Unlock the Reservoir Engineering Suite to run with your data.
Waterflood Screening
🔒 PREVIEWEvaluate water, injection, or disposal behavior for surveillance and development decisions.Unlock the Reservoir Engineering Suite to run with your data.
Gas Compressibility
DocsCalculate z-factor inputs for gas material balance, deliverability, and reserves checks.
Gas P/Z
🔒 PREVIEWAnalyze gas properties, deliverability, treating, or operating constraints for the system.Unlock the Reservoir Engineering Suite to run with your data.
Gas Deliverability
🔒 PREVIEWAnalyze gas properties, deliverability, treating, or operating constraints for the system.Unlock the Reservoir Engineering Suite to run with your data.
Critical Rate
🔒 PREVIEWUse waterflood predictor inputs to produce a documented engineering result for review.Unlock the Reservoir Engineering Suite to run with your data.
Condensate Yield
🔒 PREVIEWConvert gas composition and separator behavior into condensate yield estimates.Unlock the Reservoir Engineering Suite to run with your data.
Gas Material Balance
🔒 PREVIEWUse pressure, production, and fluid data to estimate connected volume and drive support.Unlock the Reservoir Engineering Suite to run with your data.
EUR Comparison
🔒 PREVIEWUse gas material balance inputs to produce a documented engineering result for review.Unlock the Reservoir Engineering Suite to run with your data.
Recovery Factor
DocsBenchmark expected recovery against fluid, rock, drive, and development assumptions.
Relperm Editor
🔒 PREVIEWUse recovery factor inputs to produce a documented engineering result for review.Unlock the Reservoir Engineering Suite to run with your data.
Pro workflows
Havlena Odeh Plot
🔒 PREVIEWBuild material-balance diagnostic plots to identify drive mechanism and connected volume.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Blasingame RTA
🔒 PREVIEWUse rate-normalized pressure functions to interpret unconventional reservoir performance.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Duong Decline
🔒 PREVIEWBuild forecast cases and compare production behavior with documented assumptions.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Probabilistic Forecast
🔒 PREVIEWBuild forecast cases and compare production behavior with documented assumptions.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
EUR Distribution
🔒 PREVIEWForecast unconventional wells with Duong decline behavior and documented limits.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Material Balance Time
🔒 PREVIEWUse pressure, production, and fluid data to estimate connected volume and drive support.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Field Decline Forecast
🔒 PREVIEWBuild forecast cases and compare production behavior with documented assumptions.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Pore Pressure Prediction
🔒 PREVIEWCalculate pressure behavior and operating limits from the available engineering inputs.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
Wellbore Heat Loss
🔒 PREVIEWUse material balance time inputs to produce a documented engineering result for review.This workflow is part of the Reservoir Engineering Suite. Unlock the suite to run it with your data, save outputs, and request workflow improvements.
🔒 Preview tools show problem statement, sample output, and inputs summary. Unlock the suite to run with your data.
Sample scenarios
Monthly reserve forecast update
A reservoir engineer imports recent production, checks fluid properties in the PVT workflow, and reruns decline-curve cases for PDP wells. Material balance and recovery-factor checks flag wells where the forecast implies unrealistic recovery. The asset team leaves the review with a cleaner EUR range and a short list of wells needing pressure data.
Waterflood expansion screening
An operator evaluating an infill pattern starts with contacts, permeability, and Buckley-Leverett displacement assumptions. Waterflood screening narrows the pattern candidates, then probabilistic forecast outputs show the incremental oil range. The development team can decide whether to move into simulation or defer the pattern.
Methodology
Built on validated petroleum engineering correlations
Reservoir calculations draw from black-oil PVT correlations, material-balance formulations, Arps and modified decline methods, Buckley-Leverett displacement theory, radial-flow deliverability concepts, aquifer influx approximations, and SPE-style volumetric reserves practices.
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 this replace a full reservoir simulator?
No. It is a fast engineering screening and documentation layer for forecasts, material balance, volumetrics, waterflood checks, and diagnostics. Use it before simulation to clean assumptions, after simulation to sanity-check outputs, and during reviews when a full model run is not practical.
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
- 8 workflows included:
- Decline Curve
- IPR Calculator
- PVT Calculator
- Material Balance
- Reserves Volumetric
- Recovery Factor
- Aquifer Influx
- Waterflood Screening
- + flagship demo: Decline Curve Analyzer
Real data input & file upload
Saved runs & exports (CSV, PDF)
Email support from Groundwork Analytics
Maintenance & feature requests
Pro
$1000/mo
per user
- Everything in Standard, plus:
- Reserve Estimation Workflow— orchestrated 6-step OOIP/OGIP estimation, defensible for reserves booking. Combines volumetric, MBE, Havlena-Odeh, water influx, RF by drive mechanism, and DCA cross-check.
- Pro-only workflows:
- Havlena Odeh Plot
- Blasingame RTA
- Duong Decline
- Probabilistic Forecast
- EUR Distribution
- Material Balance Time
- Field Decline Forecast
- Pore Pressure Prediction
Batch DCA and field forecasts for multi-well reviews
Larger CSV uploads for asset-scale well lists
AICc-ranked fits, residuals, and forecast exports
Priority support for reserves-cycle deadlines
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?
Book a live walkthrough with Groundwork Analytics.
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