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Table 3. Kinetic Parameters for Standard Type II and Type II-S Kerogens*
  Standard Type II** Type II-S† Monterey Initial Potential (mg/g OC) Type II-S† Kirkuk Initial Potential (mg/g OC)
Oil potential from kerogen (mg/g TOC) 350 350   350 –
Gas potential from kerogen (mg/g TOC) 65 –   – –
Oil to gas cracking efficiency (%) 50 –   – –
A factor, hydrocarbon generation (1/s) 3.012 x 1013 1.5 x 1014   1.5 x 1014 –
A factor, oil cracking (1/s) 1.015 x 1012 –   – –
Activation energy foroil cracking (kcal/mol) 54 –   – –
Activation energy for hydrocarbon generation (kcal/mol); fraction††          
40 – 0.003 2 0.026 12.8
42 – –   0.0183 9
44 – 0.0137 9 0.0098 4.8
46 – 0.0222 14.5 0.0154 7.6
48 – 0.3106 203.3 0.0601 29.6
49 0.05 – – – –
50 0.2 0.4349 284.7 0.7903 389
51 0.5 – – – –
52 0.2 0.1448 94.8 0.061 30
53 0.05 – – – –
54 – 0.052 34 0.013 6.4
56 – 0.0104 6.8 0.0061 3
58 – 0.0038 2.5 – –
60 – 0.0046 3 – –

*OC = organic carbon, TOC = total organic carbon.
**Lawrence Livermore National Laboratory kinetics (Burnham and Sweeney, 1989).
†Type II-S kinetics (Tissot et al., 1987).
††Fraction of the kerogen having bonds with a particular activation energy.

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Last Updated on 6/17/98
By Jennifer Bennett