«Geology, geophysics and development of oil and gas fields»

The first magnetostratigraphic data according to the hauteriv-barremian deposits karpinsk-mangyshlakskiy composite shaft

UDC: 550.384+551.76+551.763.1
DOI: -

Authors:

¹ Saratov State University, Saratov, Russia
² LUKOIL Engineering LLC, Volgograd, Russia
³ LUKOIL-Nizhnevolzhskneft LLC, Astrakhan, Russia

Keywords: Northern Caspian, Hauterivian-Barremian deposits, stratigraphy, magnetostratigraphic method

Annotation:

For the first time, magnetostratigraphic data have been obtained for Hauterivian–Barremian deposits penetrated by five wells in the Northern Caspian, within the Caspian-Mangyshlak uplift system. In each well, 2 to 7 magnetozones of different polarities were identified, which, along with rock-magnetic data, facilitate detailed subdivision and correlation of the sections. The studied intervals reveal geomagnetic polarity magnetozones – analogues of all Barremian magnetic chrons, which serve as valuable correlation markers. The largest reversed-polarity magnetozone was identified as an analogue of the early Barremian chron M3. Correlation of Hauterivian magnetozones with the Geomagnetic Polarity Time Scale chrons remains problematic due to the complex paleomagnetic zonation of the Hauterivian stage. However, as more data are accumulated, the composite paleomagnetic section of the Lower Cretaceous deposits in the Northern Caspian will be refined and will likely become an effective stratigraphic tool. Paleomagnetic data, combined with micropaleontological studies, enable more precise well-to-well correlation and age determination. The potential of further paleomagnetic studies of terrigenous Lower Cretaceous deposits in the Northern Caspian to enhance the efficiency of geological exploration in this region appears evident.

Bibliography:

1. Khramov A.N. O paleomagnetizme kak osnove novogo metoda korrelyatsii i raschleneniya osadochnykh tolshch // DAN SSSR. – 1957. – T. 112. – № 5. – S. 849–852.
2. Guzhikov A.Yu., Molostovskiy E.A. Stratigraficheskaya informativnost’ chislennykh magnitnykh kharakteristik osadochnykh porod (metodicheskie aspekty) // Byul. MOIP. Otd. geol. – 1995. – T. 70. – Vyp. 1. – S. 32–41.
3. Molostovskiy E.A., Khramov A.N. Magnitostratigrafiya i ee znachenie v geologii. – Saratov: Izd-vo Saratovskogo gos. un-ta, 1997. – 180 s.
4. Guzhikov A.Yu. Geologicheskaya informativnost’ magnetizma kerna i shlama osadochnykh porod, poluchennykh pri burenii razvedochnykh skvazhin // Pribory i sistemy razvedochnoy geofiziki. – 2013. – № 4(46). – S. 51–61.
5. Stratigraficheskiy kodeks Rossii / Otv. red. A.I. Zhamoyda. – SPb.: Izd-vo VSEGEI, 2019. – 96 s.
6. Pogranichnye yursko-melovye otlozheniya akvatorii Srednego Kaspiya: stroenie, stratifikatsiya i perspektivy neftegazonosnosti (na primere Sarmatsko-Khvalynskoy zony podnyatiy)
/ M.V. Smirnov, S.Yu. Shtun’, O.I. Smirnova, P.F. Popova // Neft. khoz-vo. – 2019. – № 8. – S. 22–26. – DOI: 10.24887/0028-2448-2019-8-22-26
7. Rezul’taty bio- i litostratigraficheskikh issledovaniy karbonatnykh verkhneyursko-nizhnemelovykh produktivnykh otlozheniy Prikumsko-Tsentral’no-Kaspiyskoy sistemy progibov i podnyatiy (Severnyy Kaspiy) / E.Yu. Baraboshkin, A.Yu. Guzhikov, A.B. Kuznetsov [i dr.] // Geologiya nefti i gaza. – 2025. – № 2. – S. 73–90. – DOI: 10.47148/0016-7894-2025-2-73-90
8. Smirnova O.I., Alekseev A.G., Smirnov M.V. Opyt primeneniya magnitostratigraficheskikh issledovaniy dlya detal’noy stratifikatsii terrigennykh otlozheniy nizhnego mela akvatorii Severnogo Kaspiya (na primere mestorozhdeniya im. V. Filanovskogo) // Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy. – 2023. – №4(376). – S. 36–41. – DOI:10.33285/2413-5011-2023-4(376)-36-41
9. Gradstein F.M., Ogg J.G., Schmitz M.D. Geologic Time Scale 2020. – Amsterdam, Oxford, Cambridge: Elsevier, 2020. – 1390 p.
10. Litologo-fatsial’nye osobennosti goteriv-barremskikh otlozheniy Severnogo Kaspiya / O.I. Smirnova, A.G. Alekseev, E.Yu. Baraboshkin, M.V. Smirnov // Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy. – 2025. –
№ 2(398). – S. 14–24.
11. Lanza R., Meloni A. The Earth’s Magnetism: An Introduction for Geologist. – Springer, 2006. – 278 p.
12. Butler R.F. Paleomagnetism: magnetic domains to geologic terranes // Blackwell Sci. Publ. – Boston, 1992. – 319 p.
13. Besse J., Courtillot V. Apparent and true polar wander and the geometry of the geomagnetic field over the last 200 Myr // J. Geophys. Res. – 2002. – Vol. 107. – № 11. – Pp. 1–31.
14. Bakhmutov V.G. Paleovekovye geomagnitnye variatsii. – Kiev: Naukova dumka, 2006. – 295 s.
15. Khramov A.N., Sholpo L.E. Paleomagnetizm. – L.: Nedra, 1967. – 224 s.