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New data on the formation of oil and gas potential in the Western Urals area of folding

Authors: Karaseva T.V., Anikeenko O.M. (KamNIIKIGS JSC, RF, Perm), V.I. Gorbachev (NPC Nedra JSC, RF, Yaroslavl)

Key words: thrust zone, oil and gas potential, bitumen, source rock.

The main purpose of this paper is to study the processes of formation of oil and gas potential in the Ural thrusts by the example of the Arakaevskaya key 1 well area located in the Sverdlovsk region in the poorly studied Lower-Serginsky perspective oil and gas area of West-Ural folding zone. According to the results of a comprehensive study of core and geophysical investigations have revealed a complex structure of the well section, divided into three parts (autochthon, parautochthon and allochthon), no oil shows and the development of the gas in the allochthon. Throughout the studied sections revealed widespread bitumen, as oil degradation products, and at the bottom of parautochthonous presence destroyed oil deposit, which occur in the generation of the Upper Devonian source rocks. According to the results of 1D basin modeling using palinspastic reconstruction concluded that the identified gas content in the Lower-Middle Carboniferous allochthonous rocks caused by the generation of gases in the source rocks after development processes of thrust dislocations and possibly at the expense of the destruction of the oil deposit. Due to the fact that Arakaevskaya well is drilled in the frontal part of thrust we suggested the possibility of oil deposits conservation in other areas of the Lower-Serginsky perspective oil and gas area. The results can be used to assess the petroleum and gas potential of the zone of folding of the Sverdlovsk region and other regions.
References
1. Adams O.C., Oline W.F., Petroleum potential of South-Western Wyoming and adjacent areas, Symposium of Rocky mountain association of geologist, 1990, pp. 129–141.
2. Williams B., New California field added to list of United States giants, Oil and Gas J., 1984, V. 82, no. 5, pp. 134-136.
3. Anikeenko O.M., Transformation products of oil in the sections of the parametric wells (In Russ.), Collected papers “Geologiya v razvivayushchemsya mire” (Geology in the developing world), Proceedings of VI Scientific and Practical Conference of Students and Young Scientists with international participation, Perm': PGNIU, 2013, V. 1, pp. 207–210.
4. Anikeenko O.M., Karaseva T.V., Khopta I.S., The results of the study the bitumen in the context of parametric well (In Russ.), Vestnik PGNIU, 2013, V. 2(19), pp. 79-86.
5. Sanfirova S.S, Karaseva T.V., Forms of occurrence the solid bitumen in the Silurian sediments of Kolvinskaya deep well as a reflection of the migration, accumulation and degradation of oil (In Russ.), Collected papers “Rezul'taty
glubokogo i sverkhglubokogo bureniya, problemy neftegazonosnosti i
rudonosnosti” (The results of the deep and ultra-deep drilling, oil and gas potential problems and ore-bearing), Perm': Publ. of KamNIIKIGS, 2000, pp. 81–87.
6. Karaseva T.V., Gorbachev V.I., Titova G.I., Frik M.G., Isotope-geochemical criterions of the West Siberian deep deposits gas content (In Russ.), Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy, 2009, no. 6, pp. 20-30.
7. Provorov M.V., Features of structure and petroleum potential of Upper Tournaisian paleoshelf northern and western regions of the Ural-Volga (In Russ.), Geologiya nefti i gaza – The journal Oil and Gas Geology,1992, no. , pp. 21-28.
8. Melkishev O.A., Galkin V.I., Kozhevnikova E.E., Karaseva T.V., Prediction of zonal hydrocarbon potentials Devonian clastic sediments on the south of Perm Region (In Russ.), Neftyanoe khozyaystvo – Oil Industry, 2014, no. 6, pp. 4-8.

Key words: thrust zone, oil and gas potential, bitumen, source rock.

The main purpose of this paper is to study the processes of formation of oil and gas potential in the Ural thrusts by the example of the Arakaevskaya key 1 well area located in the Sverdlovsk region in the poorly studied Lower-Serginsky perspective oil and gas area of West-Ural folding zone. According to the results of a comprehensive study of core and geophysical investigations have revealed a complex structure of the well section, divided into three parts (autochthon, parautochthon and allochthon), no oil shows and the development of the gas in the allochthon. Throughout the studied sections revealed widespread bitumen, as oil degradation products, and at the bottom of parautochthonous presence destroyed oil deposit, which occur in the generation of the Upper Devonian source rocks. According to the results of 1D basin modeling using palinspastic reconstruction concluded that the identified gas content in the Lower-Middle Carboniferous allochthonous rocks caused by the generation of gases in the source rocks after development processes of thrust dislocations and possibly at the expense of the destruction of the oil deposit. Due to the fact that Arakaevskaya well is drilled in the frontal part of thrust we suggested the possibility of oil deposits conservation in other areas of the Lower-Serginsky perspective oil and gas area. The results can be used to assess the petroleum and gas potential of the zone of folding of the Sverdlovsk region and other regions.
References
1. Adams O.C., Oline W.F., Petroleum potential of South-Western Wyoming and adjacent areas, Symposium of Rocky mountain association of geologist, 1990, pp. 129–141.
2. Williams B., New California field added to list of United States giants, Oil and Gas J., 1984, V. 82, no. 5, pp. 134-136.
3. Anikeenko O.M., Transformation products of oil in the sections of the parametric wells (In Russ.), Collected papers “Geologiya v razvivayushchemsya mire” (Geology in the developing world), Proceedings of VI Scientific and Practical Conference of Students and Young Scientists with international participation, Perm': PGNIU, 2013, V. 1, pp. 207–210.
4. Anikeenko O.M., Karaseva T.V., Khopta I.S., The results of the study the bitumen in the context of parametric well (In Russ.), Vestnik PGNIU, 2013, V. 2(19), pp. 79-86.
5. Sanfirova S.S, Karaseva T.V., Forms of occurrence the solid bitumen in the Silurian sediments of Kolvinskaya deep well as a reflection of the migration, accumulation and degradation of oil (In Russ.), Collected papers “Rezul'taty
glubokogo i sverkhglubokogo bureniya, problemy neftegazonosnosti i
rudonosnosti” (The results of the deep and ultra-deep drilling, oil and gas potential problems and ore-bearing), Perm': Publ. of KamNIIKIGS, 2000, pp. 81–87.
6. Karaseva T.V., Gorbachev V.I., Titova G.I., Frik M.G., Isotope-geochemical criterions of the West Siberian deep deposits gas content (In Russ.), Geologiya, geofizika i razrabotka neftyanykh i gazovykh mestorozhdeniy, 2009, no. 6, pp. 20-30.
7. Provorov M.V., Features of structure and petroleum potential of Upper Tournaisian paleoshelf northern and western regions of the Ural-Volga (In Russ.), Geologiya nefti i gaza – The journal Oil and Gas Geology,1992, no. , pp. 21-28.
8. Melkishev O.A., Galkin V.I., Kozhevnikova E.E., Karaseva T.V., Prediction of zonal hydrocarbon potentials Devonian clastic sediments on the south of Perm Region (In Russ.), Neftyanoe khozyaystvo – Oil Industry, 2014, no. 6, pp. 4-8.


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