Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods
The Timan-Pechora basin still has a large importance and as a potential region for the hydrocarbons mining in Russia. At present, new facts are emerging from oil and gas exploration. The authors studied more than 50 samples from 11 wells. Most samples in this series were related to the Middle-Late-F...
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ftdoajarticles:oai:doaj.org/article:bedad83681d14c559cd146949fca48e3 2023-05-15T17:54:57+02:00 Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods N.V. Pronina M.S. Luzhbina D.V. Makarov 2017-05-01T00:00:00Z https://doaj.org/article/bedad83681d14c559cd146949fca48e3 EN RU eng rus Georesursy Ltd. https://geors.ru/archive/article/839/ https://doaj.org/toc/1608-5043 https://doaj.org/toc/1608-5078 10.18599/grs.19.9 1608-5043 1608-5078 https://doaj.org/article/bedad83681d14c559cd146949fca48e3 Georesursy, Iss Special issue, Pp 80-87 (2017) Organic macerals vitrinite reflectance index catagenesis zones modelling Geology QE1-996.5 article 2017 ftdoajarticles 2022-12-31T04:16:13Z The Timan-Pechora basin still has a large importance and as a potential region for the hydrocarbons mining in Russia. At present, new facts are emerging from oil and gas exploration. The authors studied more than 50 samples from 11 wells. Most samples in this series were related to the Middle-Late-Frasnian sediments (Late Devonian), which are allocated in «domanic» horizon. Organic macerals of the studed samples are represented both by fragments of humic macerals and sapropelic OM (formed from algal material). The common organic macerals in Timan-Pechora basin are bituminites. They were met in all samples without exception and provide total content of OM,% in the rock. Bituminites are regularly distributed among mineral matter and color the rock in gray or more dark colors. Bituminite was used to determine the reflectance index (RB,%) that later was converted into the corresponding equivalent of vitrinite reflectance index (RVeq,%). This is particularly important as authors’ information was used together with the results of earlier studies. ID-modeling has been made in the program PetroMod (2015.1 Schlumberger) and helped to understand evolution in Timan-Pechora basin and maturity degree of rocks. The concept of the model was coordinated with the main evolution stages of the northeast European Platform and the foredeep Ural trough. The thicknesses of catagenesis zones and position of boundaries between them are indicators of thermal regime in the analyzed regions. The heat flow used in the modelling was one and the same for most tectonic regions (except foredeep Ural trough and Khoreiverskaja depression). According to the classification of the sedimentary basins by P. Robert (1985), 5 regions belong to regions with a normal or slightly hypothermal geothermal regime (heat flow 45-65 mV/m2) and foredeep Ural trough with heat flow up to 74 mV/m2 is a region with a high hyperthermal regime. Article in Journal/Newspaper Pechora Directory of Open Access Journals: DOAJ Articles |
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topic |
Organic macerals vitrinite reflectance index catagenesis zones modelling Geology QE1-996.5 |
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Organic macerals vitrinite reflectance index catagenesis zones modelling Geology QE1-996.5 N.V. Pronina M.S. Luzhbina D.V. Makarov Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods |
topic_facet |
Organic macerals vitrinite reflectance index catagenesis zones modelling Geology QE1-996.5 |
description |
The Timan-Pechora basin still has a large importance and as a potential region for the hydrocarbons mining in Russia. At present, new facts are emerging from oil and gas exploration. The authors studied more than 50 samples from 11 wells. Most samples in this series were related to the Middle-Late-Frasnian sediments (Late Devonian), which are allocated in «domanic» horizon. Organic macerals of the studed samples are represented both by fragments of humic macerals and sapropelic OM (formed from algal material). The common organic macerals in Timan-Pechora basin are bituminites. They were met in all samples without exception and provide total content of OM,% in the rock. Bituminites are regularly distributed among mineral matter and color the rock in gray or more dark colors. Bituminite was used to determine the reflectance index (RB,%) that later was converted into the corresponding equivalent of vitrinite reflectance index (RVeq,%). This is particularly important as authors’ information was used together with the results of earlier studies. ID-modeling has been made in the program PetroMod (2015.1 Schlumberger) and helped to understand evolution in Timan-Pechora basin and maturity degree of rocks. The concept of the model was coordinated with the main evolution stages of the northeast European Platform and the foredeep Ural trough. The thicknesses of catagenesis zones and position of boundaries between them are indicators of thermal regime in the analyzed regions. The heat flow used in the modelling was one and the same for most tectonic regions (except foredeep Ural trough and Khoreiverskaja depression). According to the classification of the sedimentary basins by P. Robert (1985), 5 regions belong to regions with a normal or slightly hypothermal geothermal regime (heat flow 45-65 mV/m2) and foredeep Ural trough with heat flow up to 74 mV/m2 is a region with a high hyperthermal regime. |
format |
Article in Journal/Newspaper |
author |
N.V. Pronina M.S. Luzhbina D.V. Makarov |
author_facet |
N.V. Pronina M.S. Luzhbina D.V. Makarov |
author_sort |
N.V. Pronina |
title |
Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods |
title_short |
Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods |
title_full |
Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods |
title_fullStr |
Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods |
title_full_unstemmed |
Return to the catagenesis assessment of the sedimentary stratum in the Timan‑Pechora oil and gas basin by means of coal petrographical methods |
title_sort |
return to the catagenesis assessment of the sedimentary stratum in the timan‑pechora oil and gas basin by means of coal petrographical methods |
publisher |
Georesursy Ltd. |
publishDate |
2017 |
url |
https://doaj.org/article/bedad83681d14c559cd146949fca48e3 |
genre |
Pechora |
genre_facet |
Pechora |
op_source |
Georesursy, Iss Special issue, Pp 80-87 (2017) |
op_relation |
https://geors.ru/archive/article/839/ https://doaj.org/toc/1608-5043 https://doaj.org/toc/1608-5078 10.18599/grs.19.9 1608-5043 1608-5078 https://doaj.org/article/bedad83681d14c559cd146949fca48e3 |
_version_ |
1766162814682005504 |