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RockEval Parameters
TOC - Total Organic Carbon (weight percent)
S1 - hydrocarbons volatilized at 300ºC (mg HC/g rock)
S2 - hydrocarbons evolved from kerogen at 300ºC to 600ºC (mg HC/g rock)
S3 - organic CO2 generated from 300ºC to 390ºC (mg/g rock)
PI - Production Index (S1/[S1+S2])
HI - Hydrogen Index (mg hydrocarbons/g organic carbon)
OI - Oxygen Index (mg CO2/g organic carbon)
TMAX - maximum temperature at S2 peak (ºC)