Petroleum laboratories
Kerogen Analysis Lab
Rock-Eval results to kerogen type and maturity.
Calculates hydrogen, oxygen and production indices from Rock-Eval pyrolysis, estimates vitrinite-equivalent maturity from Tmax, and plots samples on HI–TOC, pseudo-Van Krevelen and HI–Tmax diagrams.
Overview
Enter TOC, S2 and S3 for each sample. Samples below 0.5 wt% TOC are flagged as unreliable. Each point lands among the Type I, II, III and IV evolution paths, and the sample table exports to Excel.
What you enter · What you get
What you enter
- Sample or well ID and depth
- TOC (wt%)
- S1, S2, S3 (mg/g rock)
- Tmax (°C)
What you get
- HI, OI, PI and calculated Ro
- Kerogen type, source-rock quality and maturity
- Three interactive diagrams
- CSV table and PNG charts
How it works in the field
Enter pyrolysis data
Plot each sample
Export the table
Method and equations
Pyrolysis indices
Espitalié et al. (1977); Peters (1986).
HI = 100·S2/TOC · OI = 100·S3/TOC · PI = S1/(S1+S2)
Maturity from Tmax
Jarvie et al. (2001) conversion, valid for type II kerogen.
Ro(calc) = 0.0180·Tmax − 7.16
Who uses it
Petroleum geochemistsExploration geologistsGraduate students
Standards and references
- Espitalié, J. et al. (1977). Méthode rapide de caractérisation des roches mères. Revue de l’IFP, 32, 23–42.
- Peters, K.E. (1986). Guidelines for evaluating petroleum source rock using programmed pyrolysis. AAPG Bulletin, 70, 318–329.
- Jarvie, D.M. et al. (2001). Oil and shale gas from the Barnett Shale. AAPG Annual Meeting abstract.
- Peters, K.E. & Cassa, M.R. (1994). Applied source rock geochemistry. AAPG Memoir 60, 93–120.
Results support professional judgement. They do not replace a licensed engineer’s or geologist’s sign-off.
At a glance
- Category
- Petroleum laboratories
- Runs on
- Phone, tablet and desktop browser
- Export
- CSV table, PNG charts, PDF report
- Access
- Subscribers
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