The range of Ts (%) The range of Ro (%) stage Linear slope Linear slope of gaseous hydrocrabons (kg) Linear slope of expelled oil (ke) Linear slope of residual bitumen (kb)
335-360 0.82-1.09 Lower maturity stage k1 14.52 101.48 -2.85
360-400 1.09-1.65 Maturity stage k2 39.39 6.07 -20.20
400-480 1.65-2.30 Higher maturity stage k3 82.29 0.14 -3.31
480-575 2.30-3.24 Post-maturity stage k4 172.89 -0.03 -3.28