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