Geochemistry of oils and organic matter in the Upper Jurassic deposits of the western part of the West Siberian oil and gas basin
UDC: 553.98.061.17(571.1)
DOI: 10.33285/2413-5011-2023-11(383)-14-23
Authors:
BAZHUKOVA TATYANA A.
1,
NEMOVA VARVARA D.1,
GAVRILOVA NATALYA E.2,
VORONKOVA OLGA A.2,
SPIRIDONOV DMITRIY A.2
1 LUKOIL Engineering LLC, Moscow, Russia
2 LUKOIL-Engineering Limited PermNIPIneft Branch Office in Perm, Perm, Russia
Keywords: the Upper Jurassic deposits, oil deposits, geochemical studies, organic matter, hydrocarbons, biomarker analysis
Annotation:
The article is devoted to the oils genesis determination in the Upper Jurassic deposits within the western side of the Frolovskaya mega-depression and the eastern part of the Krasnoleninskiy arch as well as to the contouring of single hydrodynamically connected bodies in a complexly organized Upper Jurassic reservoir using integrated geochemical studies of organic matter and oils from wells both in well-studied areas (Middle-Nazymskaya, Galyanovskaya and Aprelskaya) and in the new license area – Lyaminskiy-16, where for the first time since 2023 an oil inflow was obtained in well 1P, which opened a section of the Upper Jurassic deposits, atypical for the Frolovskaya oil and gas territory, characterized by an increased thickness of the lower low-radiation stratum.
According to biomarkers composition and distribution, a single genetic type of oils from the Upper Jurassic deposits of the studied areas was revealed, associated with sapropelic organic matter (OM) of oil source rocks that are in conditions of the main phase of oil formation (MK1–MK2 catagenesis gradation). Differences of some molecular parameters have been established, mainly associated with different degrees of maturity of the studied oils, which is also reflected in their physicochemical properties. The obtained results of the oils molecular composition allow concluding that the structure of the Upper Jurassic reservoir is geochemically zonal, the oil-saturated bodies of which form extended unified fluid-dynamic systems within each of the fields under consideration, but separated between them, and in some cases even between blocks inside one and the same deposit (Galyanovskoye).
Bibliography:
1. Dakhnova M.V., Mozhegova S.V., Nazarova E.S. Metody organicheskoy geokhimii v svyazi s izucheniem problemy neftegazonosnosti domanikitno-domanikoidnykh tolshch // Geologiya nefti i gaza. – 2013. – Spetsvypusk. – S. 108–113.
2. Otsenka zapasov "slantsevoy nefti" s ispol’zovaniem geokhimicheskikh parametrov / M.V. Dakhnova, S.V. Mozhegova, E.S. Nazarova, I.L. Payzanskaya // Geologiya nefti i gaza. – 2015. – № 4. – S. 55–61.
3. Geokhimicheskie metody v reshenii zadach, svyazannykh s osvoeniem zalezhey nefti v bazhenovskoy svite na zapade Shirotnogo Priob’ya / M.V. Dakhnova, E.S. Nazarova, V.S. Slavkin [i dr.] // Geologiya nefti i gaza. – 2007. – № 6. – S. 39–43.
4. Tekhnologiya issledovaniya geokhimicheskikh parametrov organicheskogo veshchestva kerogenonasyshchennykh otlozheniy (na primere bazhenovskoy svity, Zapadnaya Sibir’) / E.V. Kozlova, N.P. Fadeeva, G.A. Kalmykov [i dr.] // Vestnik Moskovskogo un-ta. Ser. 4. Geologiya. – 2015. – № 5.
5. Nemova V.D., Matyukhina T.A. Zavisimost’ soderzhaniya i sostava organicheskogo veshchestva ot litologicheskikh tipov porod bazhenovskoy svity // Ekspozitsiya Neft’ Gaz. – 2018. – № 4(64). – S. 23–26.
6. Litologo-petrofizicheskaya kharakteristika produktivnykh intervalov pozdneyursko-rannemelovykh otlozheniy Sredne-Nazymskogo mestorozhdeniya / V.D. Nemova, A.M. Pogodaeva, O.O. Kim, T.A. Matyukhina // Neftegazovaya geologiya. Teoriya i praktika. – 2020. – T. 15. – № 2. – URL: http://www.ngtp.ru/rub/2020/12_2020.html
7. Samoylenko V.V. Geokhimiya organicheskogo veshchestva verkhneyurskikh otlozheniy yugo-vostoka Zapadnoy Sibiri i geneticheski svyazannykh s nim flyuidov: dis. … kand. geol.-miner. nauk. – Tomsk, 2011. – 351 s.
8. Rol’ geokhimicheskikh metodov v prognoze neftenosnosti i otsenke resursnogo potentsiala chernoslantsevykh tolshch (na primere bazhenovskoy svity) / M.B. Skvortsov, M.V. Dakhnova, S.V. Mozhegova [i dr.] // Geologiya i geofizika. – 2017. – T. 58. – № 3–4. – S. 495–503.
9. Soboleva E.E. Formirovanie sostava neftey plasta Yu0 bazhenovskoy svity Salymskogo mestorozhdeniya // Georesursy. – 2017. – Spetsvypusk. Ch. 2. – S. 144–154.
10. Chakhmakhchev A.V., Suzuki N., Chakhmakhchev V.A. Uglevodorody-biomarkery pri geokhimicheskoy otsenke perspektiv neftegazonosnosti Yamala // Geokhimiya. – 1995. – № 5. – S. 665–675.
11. Hughes W.B. Use of thiophenic organosulfur compounds in characterizing crude oil derived from carbonate versus siliciclastic sources. In: Petroleum Geochemistry and Source Rock Potential of Carbonate Rocks. – Tulsa, 1984. – Pp. 181–196.
12. Peters K.E., Walter C.C., Moldowan J.M. The biomarker guide. 2nd ed. – Prentice Hall, Cambridge University Press, 2005. – 1155 p.
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