SATURATED AND AROMATIC BIOMARKER HYDROCARBONS IN OILS OF THE BAYKIT ANTECLISE
The relevance of the research is caused by the need to expand the resource base in the fields of the Baykit anteclise. Occurrence of two types of oils may be caused by additional source, which increases the prospects of the area. However, variations in the composition of oils may also be associated...
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| Format: | Article |
| Language: | Russian |
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Tomsk Polytechnic University
2020-01-01
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| Series: | Известия Томского политехнического университета: Инжиниринг георесурсов |
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| Online Access: | http://izvestiya.tpu.ru/archive/article/view/2459/2153 |
| Summary: | The relevance of the research is caused by the need to expand the resource base in the fields of the Baykit anteclise. Occurrence of two types of oils may be caused by additional source, which increases the prospects of the area. However, variations in the composition of oils may also be associated with high catagenesis and migration effects; therefore, an assessment of the influence of these factors on composition of oils is necessary. The aim of research is to determine the influence of genetic, catagenetic and migration factors on biomarker hydrocarbons in the oils of the Baykit anteclise, to identify areas of preferential influence of each of them. Objects of the research are the oils of the Baykit anteclise. Methods: comparison of the characteristics of biomarker hydrocarbons obtained using gas chromarography-mass spectrometry in saturated and aromatic fractions of oils, assessment of the impact on their composition of the contribution from different source formations, catagenesis and migration, grouping of oils by the predominance of the influence of these factors. Results. The author has characterized biomarker hydrocarbons of saturated and aromatic fractions of the oils from Riphean and Vendian collectors of the Baykit anteclise. Based on the characteristics, which differ from the previously obtained characteristics of the most common and typical ancient oils of the Siberian platform, the author made a conclusion on the impact of the contribution from the Upper Riphean Iremekensky stratum in two oils in the east of the Kuyumbinskoye field, as well as the contribution of probably Vendian oil source formations in oils from Vendian collectors. The main factor in the formation of the composition of most oils of the Kuyumbinskoe field was high catagenesis, enhanced by migration effects towards the enrichment of low molecular weight compounds. Probably, several oils are a mixture of two components with different catagenesis, moreover, more transformed component is enriched with saturated, including cyclic compounds, and less transformed – with aromatic compounds. |
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| ISSN: | 2500-1019 2413-1830 |