Fault mapping methodology based on the intrusive bodies’ distribution: Baikit anteclise Vendian-Cambrian rock study (Siberian craton)

UDK: 551.24
DOI: 10.24887/0028-2448-2021-5-60-66
Key words: Eastern Siberia, magmatism, correlation, intrusion, faults
Authors: N.M. Kutukova (Rosneft Oil Company, RF, Moscow), V.V. Volianskaiа (Rosneft Oil Company, RF, Moscow), V.L. Shuster (Oil and Gas Research Institute of RAS, RF, Moscow)

The geological structure of Baikit anteclise crust (Siberian craton) is very complicated and has to be studied with attention to the regional specifics. The presence of permafrost, numerous igneous bodies, and salt-bearing strata does the fault identification process in this region more sophisticated. For this purpose the Fault Mapping Methodology based on the intrusive bodies distribution has been crated during geological research and oil field modelling of the petroleum production area of Kamovsky anticline. In general, Rosneft Oil Company always put lots of attention to the adaptation of the oil field production activities to the geological phenomenon complexity and paleo processes reconstruction multivariance. According on this manner, the quality of the oil field geological models is inarching. Especially, this is very important for huge petroleum resources. As a result of 100 wells geological correlation, the position of faults (Pre-Vendian and Paleozoic age) was corrected according on igneous body “jumps” to the overlying sedimentary rocks. The geological model of oil field was supplemented with more detailed faults position done by intrusive bodies interpreted geometry. The main methodology concept is the idea that magma is intruding vertically by new or existing fault and, when the overlaying rock pressure became equal to the magma flow pressure, this flow has been changing the intruding direction to the horizontal and going by layers boundary.

This methodology can be used for the fault position identification in different sedimentary basins with magma intrusions or in boundary zones between basins and orogeny. Mapping of intrusive bodies is a key task in planning exploration work, since the Siberian platform is an ideal object for studying the influence of trap magmatism on oil and gas content, namely, identifying patterns in the distribution of oil and gas deposits in the area of trap magmatism and substantiating the most promising areas for drilling.

References

1. Kutukova N.M., Shuster V.L., Pankov M.V. et al., Integrated approach to the modeling of the carbonate reservoir with complicated trap structure in Eastern Siberia (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2009, no. 11, pp. 23–27.

2. Kontorovich A.E., Mel'nikov N.V., Surkov B.C. et al., Baykitskiy region (Baikit region), Neftegazonosnye basseyny i regiony Sibiri (Oil and gas basins and regions of Siberia), 1994, V. 6, 52 p.

3. Vasil'ev G.A., Svyaz' trappovogo magmatizma so strukturnym planom Katangskoy sedloviny i Baykitskoy anteklizy (Relationship of trap magmatism with the structural plan of the Katanga saddle and the Baikit anteclise), Collected papers “Zakonomernosti razmeshcheniya mestorozhdeniy nefti i gaza Sibirskoy platformy” (Regularities of the location of oil and gas fields of the Siberian platform), Novosibirsk: Publ. of SNIIGGIMS, 1990, pp. 49–56.

4. Alekseeva K.S., Popova L.P., Postnikov A.V., Postnikova O.V., The isotopic–geochronological age of trap formation rocks in the sedimentary section of the Baikit anteclise (In Russ.), Doklady akademii nauk = Doklady Earth Sciences, 2016, V. 470, no. 6, pp. 1–6.

5. Gazhula S.V., Features of trap magmatism in connection with the oil and gas content of the Siberian platform (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2008, no. 3, pp. 1–8.

6. Kutukova N.M., Rekonstruktsiya geologicheskogo stroeniya, usloviy formirovaniya i prognoz uglevodorodnykh skopleniy rifeyskikh otlozheniy Kamovskogo svoda Baykitskoy anteklizy Vostochnoy Sibiri: na primere Yurubcheno-Tokhomskogo mestorozhdeniya (Reconstruction of the geological structure, formation conditions and forecast of hydrocarbon accumulations of the Riphean deposits of the Kamovsky arch of the Baikit anteclise in Eastern Siberia: on the example of the Yurubcheno-Tokhomsky field): thesis of candidate of geological and mineralogical science, Moscow, 2020.

7. Migurskiy A.V., Noskova E.S., Dinamika vnedreniya trappov i neftegazonosnost' v predelakh Yurubcheno-Tokhomskoy zony (Dynamics of the introduction of traps and oil and gas content within the Yurubcheno-Tokhomskaya zone), Proceedings of All-Russian metallogenic meeting II, Irkutsk, 1998, pp. 507–508

The geological structure of Baikit anteclise crust (Siberian craton) is very complicated and has to be studied with attention to the regional specifics. The presence of permafrost, numerous igneous bodies, and salt-bearing strata does the fault identification process in this region more sophisticated. For this purpose the Fault Mapping Methodology based on the intrusive bodies distribution has been crated during geological research and oil field modelling of the petroleum production area of Kamovsky anticline. In general, Rosneft Oil Company always put lots of attention to the adaptation of the oil field production activities to the geological phenomenon complexity and paleo processes reconstruction multivariance. According on this manner, the quality of the oil field geological models is inarching. Especially, this is very important for huge petroleum resources. As a result of 100 wells geological correlation, the position of faults (Pre-Vendian and Paleozoic age) was corrected according on igneous body “jumps” to the overlying sedimentary rocks. The geological model of oil field was supplemented with more detailed faults position done by intrusive bodies interpreted geometry. The main methodology concept is the idea that magma is intruding vertically by new or existing fault and, when the overlaying rock pressure became equal to the magma flow pressure, this flow has been changing the intruding direction to the horizontal and going by layers boundary.

This methodology can be used for the fault position identification in different sedimentary basins with magma intrusions or in boundary zones between basins and orogeny. Mapping of intrusive bodies is a key task in planning exploration work, since the Siberian platform is an ideal object for studying the influence of trap magmatism on oil and gas content, namely, identifying patterns in the distribution of oil and gas deposits in the area of trap magmatism and substantiating the most promising areas for drilling.

References

1. Kutukova N.M., Shuster V.L., Pankov M.V. et al., Integrated approach to the modeling of the carbonate reservoir with complicated trap structure in Eastern Siberia (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2009, no. 11, pp. 23–27.

2. Kontorovich A.E., Mel'nikov N.V., Surkov B.C. et al., Baykitskiy region (Baikit region), Neftegazonosnye basseyny i regiony Sibiri (Oil and gas basins and regions of Siberia), 1994, V. 6, 52 p.

3. Vasil'ev G.A., Svyaz' trappovogo magmatizma so strukturnym planom Katangskoy sedloviny i Baykitskoy anteklizy (Relationship of trap magmatism with the structural plan of the Katanga saddle and the Baikit anteclise), Collected papers “Zakonomernosti razmeshcheniya mestorozhdeniy nefti i gaza Sibirskoy platformy” (Regularities of the location of oil and gas fields of the Siberian platform), Novosibirsk: Publ. of SNIIGGIMS, 1990, pp. 49–56.

4. Alekseeva K.S., Popova L.P., Postnikov A.V., Postnikova O.V., The isotopic–geochronological age of trap formation rocks in the sedimentary section of the Baikit anteclise (In Russ.), Doklady akademii nauk = Doklady Earth Sciences, 2016, V. 470, no. 6, pp. 1–6.

5. Gazhula S.V., Features of trap magmatism in connection with the oil and gas content of the Siberian platform (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2008, no. 3, pp. 1–8.

6. Kutukova N.M., Rekonstruktsiya geologicheskogo stroeniya, usloviy formirovaniya i prognoz uglevodorodnykh skopleniy rifeyskikh otlozheniy Kamovskogo svoda Baykitskoy anteklizy Vostochnoy Sibiri: na primere Yurubcheno-Tokhomskogo mestorozhdeniya (Reconstruction of the geological structure, formation conditions and forecast of hydrocarbon accumulations of the Riphean deposits of the Kamovsky arch of the Baikit anteclise in Eastern Siberia: on the example of the Yurubcheno-Tokhomsky field): thesis of candidate of geological and mineralogical science, Moscow, 2020.

7. Migurskiy A.V., Noskova E.S., Dinamika vnedreniya trappov i neftegazonosnost' v predelakh Yurubcheno-Tokhomskoy zony (Dynamics of the introduction of traps and oil and gas content within the Yurubcheno-Tokhomskaya zone), Proceedings of All-Russian metallogenic meeting II, Irkutsk, 1998, pp. 507–508


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