Influence of Hydrothermal and Pyrolysis Processes on the Transformation of Organic Matter of Dense Low-Permeability Rocks from Domanic Formations of the Romashkino Oil Field

Table 4

Values of biomarker parameters normal alkanes and isoprenoids before and after hydrothermal experiments.

Parameters	Object
	Berezovskaya area		Zelenogorskaya area
	Before experiments	After experiments	Before experiments	After experiments
Pr/Ph	0.75	0.74	0.71	0.75
Pr/С17	0.70	0.67	1.15	0.69
Ph/С18	1.12	1.00	1.69	1.12
С27/С17	0.19	0.17	0.57	0.19
Σ(С27-С31)/Σ(С15-С19)	0.15	0.11	0.48	0.15
odd/even = 2n-С29/С28 + С30	0.97	1.13	0.98	0.97
(Pr + Ph)/(n-С17 + n-С18)	0.89	0.82	1.43	0.89
n-(С12-С21)/n-(С22-С30)	2.75	3.89	0.92	6.60