Petrolyt
Messy production data.
Clean decline curves.
Upload CSV or Excel, auto-clean shut-ins and outliers, then fit oil or gas with SPE-validated decline models — faster than wrestling spreadsheets.
From upload to EUR in minutes
Starter gets you in the door. Field unlocks Smart Fit, the full report, and exports.
Upload production
Drop CSV (Starter) or Excel (Field+). Petrolyt maps columns, cleans shut-ins, and shows what changed.
Fit the decline
Starter: basic Auto-Fit + manual 8-model forecast. Field+: Smart Fit ranks all 8 models by R² for oil, gas, or dual.
Read, tune & export
On Field+: interactive qi / Di / b sliders, P90/P50/P10, then PDF or CSV when you need a report.
A typical PE workflow
What you do after signup — the path from first file to a shareable EUR
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Create a well
Oil, gas, or dual-phase. Or open the free demo well to explore without uploading.
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Upload production history
CSV or Excel with date + rate (and optional cumulative / pressure). Review the import summary for shut-ins and outliers removed.
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Choose the tool
Smart Fit for day-to-day DCA (Field+). P/Z when you have pressure + Gp. VP-DCA or Fetkovich when pressure history matters (Engineer).
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Read the report
Ranked models, R² / RMSE, residuals, EUR and economic life, optional Monte Carlo P90 / P50 / P10.
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Tune with interactive scenarios
Slide qi / Di / b, save scenarios, zoom the forecast chart — then export PDF/CSV or call the API.
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Screen economics (Engineer)
NPV, IRR, payback, and sensitivity on the forecast stream — screening, not reserves booking.
What you put in. What you get out.
Clear inputs and engineer-readable outputs — no black box
Inputs
- Production file — date + oil and/or gas rate; optional cumulative
- Well type — oil (STB/d), gas (Mscf/d), or dual (both)
- Fit window — optional start/end months; shut-in & ramp filters
- Economic limit — rate cutoff for EUR life (defaults available)
- Pressure (optional) — Pwf for VP-DCA; P & Gp for P/Z
Outputs
- Ranked models — Exponential through LGA with R² / RMSE
- EUR & life — discrete monthly forecast to economic limit
- Diagnostics — residuals, rate history overlay, fit-window notes
- Uncertainty — Monte Carlo P90 / P50 / P10 on Field+ reports
- Exports — PDF presentation report, CSV forecast, scriptable API
Oil, gas, or both
Pick the well type that matches your file — dual fits two streams, it does not invent GOR
Rate in STB/d · EUR in Mbbl (or bbl)
Classical and unconventional oil DCA. Smart Fit ranks eight models; interactive scenarios use oil units throughout.
Rate in Mscf/d · EUR in MMscf
Dedicated gas Smart Fit plus P/Z material balance when you have pressure and cumulative gas for OGIP screening.
Two independent fits from one well
Upload oil and gas columns once. Petrolyt runs phase-aware fits and reports separate EURs — not a synthetic GOR model.
Try before you upload
Every Starter account includes a demo well with sample production so you can walk the clean → fit → chart path immediately. Sample CSV files are also available once you are in My Wells.
What Petrolyt does today
Clean production files, fit decline curves, and run screening economics — built for the Excel workflow
Messy-file import, Smart Auto-Fit, full DCA report
Auto-clean production history, fit Exponential through LGA, compare models with R² / RMSE, residuals, and Monte Carlo P90/P50/P10. Smart Fit and the full report are Field+.
Gas DCA, P/Z material balance, dual wells
Dedicated gas Smart Fit, P/Z for volumetric gas when pressure history exists, and dual oil & gas wells with phase-aware uploads.
Live what-if scenarios & chart zoom
Slide decline parameters, save scenarios, zoom forecasts — then export PDF/CSV or call the scriptable API (Field+).
VP-DCA, Fetkovich, multi-segment, diagnostics, economics
Variable-pressure DCA (SPE 218016), oil & gas type curves, two-segment fits, Bourdet / flow-regime / data QC, and NPV / IRR with economic decks on Engineer.
Batch forecast, compare, bulk import, sharing
Run Smart Fit across a portfolio, overlay wells, bulk-create from many files, and share with up to 5 Team seats.
Simple, transparent pricing
Start free. Upgrade when you need Smart Fit, exports, or portfolio tools.
Starter
Evaluate & learn
- 5 calculations/day · 3 wells + demo
- Manual 8-model forecast + basic Auto-Fit
- CSV upload · EUR calc · unit converter
Field
Daily well DCA
- Unlimited calcs · 25 wells
- Smart Fit · P/Z · interactive
- Full report · PDF/CSV · API
Engineer
Pressure-aware & economics
- Unlimited wells & scenarios
- VP-DCA · Fetkovich · multi-segment
- Diagnostics · NPV/IRR · decks
Team
Portfolio operations
- Batch forecast & compare
- Bulk import · portfolio export
- Well sharing (5 seats)
Built on peer-reviewed science
Every decline model traces to the original publication
Spreadsheet DCA is
slow and brittle
Messy CSV/Excel files, shut-ins, and manual curve fitting eat hours before you even trust the EUR.
Petrolyt starts
free.
Clean the file on Starter, then unlock Smart Fit, charts, and screening economics on paid plans — in the browser. No desktop install.
Sign Up FreeReady to stop fighting production spreadsheets?
Sign Up FreeFree Starter forever • Paid plans bill when you upgrade • Your well data stays yours