Published February 2020, Pg. 4-9

Section: Geology and geophysics

UOT: 550.4.41

DOI: 10.37474/0365-8554/2020-2-4-9

Adamantans in the oils as the indexes of presence of oil source rocks in deep depths (Absheron archipelago, South Caspian depression)

I.S. Guliev

O.P. Maksakova

F.R. Babaev

A.S. Javadova

R.G. Nanajanova

G.S. Martynova

Keywords:  
oil
biomarkers
adamantans
chromate-mass-spectrometry

The distribution features of adamantans of С10-С14 composition and their role in petroleum genesis has been studied, the biomarkers, adamantine and its homologs identified in Absheron archipelago oils via the method of chromate-mass-spectrometry. The calculations by the chromato-mass-spectrometry data justified that the adamantine and its methyl-substituted compounds are located in the order of increase of their thermo-dynamic steadiness in the following way: 2-Mad > 1-Mad > 3-Mad > Ad, which, in its turn, justifies the genesis of adamantine in the oils via thermic transition of normal alkanes. A complex interpretation of geological-geochemical data allows to make conclusions on a probable bedding of oil sources rocks in deep depths (approximately 13 km or deeper) of South Caspian depression.

Links