Geochemical research
| Article # 8_2021 | submitted on 03/22/2021 displayed on website on 03/30/2021 |
| 14 p. | Sidorov D.A., Sokolnikova A.A., Ryazanova T.A. |
| Assessment of the petroleum generation potential of the pre-Jurassic strata in the Western Kaymisov petroleum region | |
| The article discusses the possibility of petroleum generating in Triassic and Paleozoic sedimentary strata within the Kaimysov petroleum region in the south of the Western Siberian petroleum province. The results of pyrolytic studies show that most of the pre-Jurassic petroleum source rocks in the studied area have a very high degree of catagenetic transformation and have completely exhausted their generation potential. To assess the phases composition and specific volumes of hydrocarbons, presumably generated by these rocks, a multi-1D basin modeling was performed with testing scenarios concerning different depths and thicknesses of petroleum source rocks, in the presence or absence of the magma chamber thermal effects. As a result, the total generation of hydrocarbons was calculated, amounting to about 2 billion tons of fuel equivalent. Studies have shown that Triassic source rocks were capable of generating both liquid and gaseous hydrocarbons. The results obtained make it possible to explain the remoteness of the accumulations from the generation centers by more than one hundred km, the presence of gas and gas condensate accumulations at a low maturity of the Jurassic petroleum source rocks, and sharp differences in the composition of oils from neighboring fields in the considered territory. Keywords: pre-Jurassic strata, generation potential, Triassic source rocks, Paleozoic, Kaimysov petroleum region, Western Siberian petroleum province. |
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| article citation | Sidorov D.A., Sokolnikova A.A., Ryazanova T.A. Otsenka potentsiala generatsii uglevodorodov v doyurskikh obrazovaniyakh na zapade Kaymysovskoy neftegazonosnoy oblasti [Assessment of the petroleum generation potential of the pre-Jurassic strata in the Western Kaymisov petroleum region]. Neftegazovaya Geologiya. Teoriya I Praktika, 2021, vol. 16, no. 1, available at: http://www.ngtp.ru/rub/2021/8_2021.html |
| DOI | https://doi.org/10.17353/2070-5379/8_2021 |
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