Hydrocarbon systems of the Pre-Ural fore deep and exploration prospects of the oil and gas accumulations

UDK: 550.8
DOI: 10.24887/0028-2448-2017-4-36-40
Key words: Pre-Ural fore deep, oil and gas occurrence, oil-and-gas source rocks, generation potential, modeling
Authors: V.Yu. Kerimov, A.V. Osipov, A.S. Nefedova (Gubkin Russian State University of Oil and Gas (National Research University), RF, Moscow)
The article shows the results of four studies of petroleum systems in eastern side of the Ural deflection within the Orenburg region: Lower Devonian, Frasnian, Frasnian-Tournaisian, Visean-Bashkir and Lower Permian. The characteristic elements (oil and gas source rocks, reservoir rocks and confining beds) and are described in terms of the formation of each hydrocarbon system. To evaluate the hydrocarbon potential of the eastern side of the Ural deflection applied numerical basin modeling technology, resulting in a constructed three-dimensional geological model of the object. Carried out work allowed to make productivity calculations of oil and gas and maternal sequences of each system and create a predictive model of oil and gas potential of the eastern side of the Ural deflection. According to the results of the research it determined that the ratio of the time of formation of oil and gas traps and generation time, migration and accumulation of hydrocarbons may be acceptable for all the studied petroleum systems. The regions of most intense hydrocarbon generation: the generation of centers for all studied the petroleum systems are the southern part of Belsky depression and the northern part of the Caspian syncline. The ways of migration and areas of most likely hydrocarbon-accumulation are defined. For each hydrocarbon system ranging of the study area in terms of oil and gas potential is made and promising areas of geological exploration for oil and gas are identified. The most promising areas within the study area are the southern part of the basin and the northern Bielsko-board part of the Caspian syncline, where accumulations of hydrocarbons are forecast in all four petroleum systems. Within the northern part of the main prospects are associated with Lower Devonian, Frasnian, Frasnian-Tournaisian, and Visean-Bashkir petroleum systems. Prospects of Lower Permian hydrocarbon systems are significantly reduced due to the high risk of unfilled traps most of the territory.

References

1. Anan'ev V.V., Smelkov V.M., Pronin N.V., Prognostic evaluation of resource base of mendym-domanik formations as main hydrocarbon source of central areas of Volga-Urals oil and gas province (In Russ.), Geologiya nefti i gaza = The journal Oil and Gas Geology, 2007, no. 1, pp. 32-38.

2. Geologicheskoe stroenie i neftegazonosnost' Orenburgskoy oblasti (Geological structure and oil and gas potential of the Orenburg region), Orenburg: Orenburgskoe knizhnoe izdatel'stvo Publ., 1997, 272 p.

3. Kerimov V.Yu., Osipov A.V., Lavrenova E.A., The hydrocarbon potential of deep horizons in the south-eastern part of the Volga-Urals oil and gas province (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 4, pp. 3335.

4. Kerimov V.Yu., Mustaev R.N., Dmitrievskiy S.S. et al., The shale hydrocarbons prospects in the low permeability Khadum formation of the Pre-Caucasus (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 10, pp. 5053.

5. Kerimov V.Yu., Mustaev R.N., Senin B.V., Lavrenova E.A., Basin modeling tasks at different stages of geological exploration (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 4, pp. 2629.

6. Kerimov V.Yu., Mustaev R.N., Serikova U.S., Hydrocarbon generation-accumulative system on the territory of Crimea Peninsula and adjacent Azov and Black Seas (In Russ.), Neftyanoe khozyaystvo = Oi l Industry, 2015, no. 3, pp. 5660.

7. Kerimov V.Yu., Bondarev A.V., Osipov A.V., Serov S.G., Evolution of petroleum systems in the territory of Baikit anticlise and Kureiskaya syneclise (Eastern Siberia) (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 5, pp. 3942.

8. Kerimov V.Yu., Osipov A.V., Lavrenova E.A., The hydrocarbon potential of deep horizons in the south-eastern part of the Volga-Urals oil and gas province (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 4, pp. 3335.

9. Kerimov V.Yu, Rachinsky M.Z. et al., Geofluid dynamic concept of hydrocarbon accumulation in natural reservoirs, Doklady Earth Sciences, 2016, V. 471, no. 1, pp. 1123-1125. 

10. Kerimov V.Yu., Mustaev R.N., Bondarev A.V., Evaluation of the organic carbon content in the low-permeability shale formations (as in the case of the Khadum suite in the Ciscaucasia region), Oriental Journal of Chemistry, 2016, V. 32, no. 6., pp. 32353241.

11. Kerimov V.Yu., Gorbunov A.A., Lavrenova E.A., Osipov A.V., Models of hydrocarbon systems in the Russian PlatformUral junction zone, Lithology and Mineral Resources, 2015, V. 50, no. 5, pp. 394406.

12. Kerimov V.Yu., Lapidus A.L., Yandarbiev N.Sh. et al., Phys icochemical properties of shale strata in the Maikop series of Ciscaucasia, Solid Fuel Chemistry, 2017, V. 51, no. 2, pp. 122130.

13. Kerimov V.Yu., Serikova U.S., Mustaev R.N., Guliev I.S., Deep oil-and-gas content of South Caspian Basin (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 5, pp. 5054.

14. Kerimov V.Yu., Shilov G.Ya., Mustaev R.N., Dmitrievskiy S.S., Thermobaric conditions of hydrocarbons accumulations  formation in the low-permeability oil reservoirs of Khadum suite of the Pre-Caucasus (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 2, pp. 811.

15. Kerimov V.Y., Osipov A.V., Mustaev R.N., Monakova A.S., Modeling of petroleum systems in regions with complex geological structure, Proceedings of 16th Science and Applied Research Conference on Oil and Gas Geological Exploration and Development, Geomodel 2014.

16. Guliev I.S., Kerimov V.Yu., Mustaev R.N., Fundamental challenges of the location of oil and gas in the South Caspian Basin, Doklady Earth Sciences, 2016, V. 471, no. 1, pp. 11091112.

17. Osipov A.V., Monakova A.S., Zakharchenko M.V., Mustaev R.N., Assessment of caprock fluid-resistive characteristics of Pre-Urals Fore Deep Southern part, Proceedings of 17th Scientific-Practical Conference on Oil and Gas Geological Exploration and Development, Geomodel 2015, 2015.

The article shows the results of four studies of petroleum systems in eastern side of the Ural deflection within the Orenburg region: Lower Devonian, Frasnian, Frasnian-Tournaisian, Visean-Bashkir and Lower Permian. The characteristic elements (oil and gas source rocks, reservoir rocks and confining beds) and are described in terms of the formation of each hydrocarbon system. To evaluate the hydrocarbon potential of the eastern side of the Ural deflection applied numerical basin modeling technology, resulting in a constructed three-dimensional geological model of the object. Carried out work allowed to make productivity calculations of oil and gas and maternal sequences of each system and create a predictive model of oil and gas potential of the eastern side of the Ural deflection. According to the results of the research it determined that the ratio of the time of formation of oil and gas traps and generation time, migration and accumulation of hydrocarbons may be acceptable for all the studied petroleum systems. The regions of most intense hydrocarbon generation: the generation of centers for all studied the petroleum systems are the southern part of Belsky depression and the northern part of the Caspian syncline. The ways of migration and areas of most likely hydrocarbon-accumulation are defined. For each hydrocarbon system ranging of the study area in terms of oil and gas potential is made and promising areas of geological exploration for oil and gas are identified. The most promising areas within the study area are the southern part of the basin and the northern Bielsko-board part of the Caspian syncline, where accumulations of hydrocarbons are forecast in all four petroleum systems. Within the northern part of the main prospects are associated with Lower Devonian, Frasnian, Frasnian-Tournaisian, and Visean-Bashkir petroleum systems. Prospects of Lower Permian hydrocarbon systems are significantly reduced due to the high risk of unfilled traps most of the territory.

References

1. Anan'ev V.V., Smelkov V.M., Pronin N.V., Prognostic evaluation of resource base of mendym-domanik formations as main hydrocarbon source of central areas of Volga-Urals oil and gas province (In Russ.), Geologiya nefti i gaza = The journal Oil and Gas Geology, 2007, no. 1, pp. 32-38.

2. Geologicheskoe stroenie i neftegazonosnost' Orenburgskoy oblasti (Geological structure and oil and gas potential of the Orenburg region), Orenburg: Orenburgskoe knizhnoe izdatel'stvo Publ., 1997, 272 p.

3. Kerimov V.Yu., Osipov A.V., Lavrenova E.A., The hydrocarbon potential of deep horizons in the south-eastern part of the Volga-Urals oil and gas province (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 4, pp. 3335.

4. Kerimov V.Yu., Mustaev R.N., Dmitrievskiy S.S. et al., The shale hydrocarbons prospects in the low permeability Khadum formation of the Pre-Caucasus (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 10, pp. 5053.

5. Kerimov V.Yu., Mustaev R.N., Senin B.V., Lavrenova E.A., Basin modeling tasks at different stages of geological exploration (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 4, pp. 2629.

6. Kerimov V.Yu., Mustaev R.N., Serikova U.S., Hydrocarbon generation-accumulative system on the territory of Crimea Peninsula and adjacent Azov and Black Seas (In Russ.), Neftyanoe khozyaystvo = Oi l Industry, 2015, no. 3, pp. 5660.

7. Kerimov V.Yu., Bondarev A.V., Osipov A.V., Serov S.G., Evolution of petroleum systems in the territory of Baikit anticlise and Kureiskaya syneclise (Eastern Siberia) (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2015, no. 5, pp. 3942.

8. Kerimov V.Yu., Osipov A.V., Lavrenova E.A., The hydrocarbon potential of deep horizons in the south-eastern part of the Volga-Urals oil and gas province (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 4, pp. 3335.

9. Kerimov V.Yu, Rachinsky M.Z. et al., Geofluid dynamic concept of hydrocarbon accumulation in natural reservoirs, Doklady Earth Sciences, 2016, V. 471, no. 1, pp. 1123-1125. 

10. Kerimov V.Yu., Mustaev R.N., Bondarev A.V., Evaluation of the organic carbon content in the low-permeability shale formations (as in the case of the Khadum suite in the Ciscaucasia region), Oriental Journal of Chemistry, 2016, V. 32, no. 6., pp. 32353241.

11. Kerimov V.Yu., Gorbunov A.A., Lavrenova E.A., Osipov A.V., Models of hydrocarbon systems in the Russian PlatformUral junction zone, Lithology and Mineral Resources, 2015, V. 50, no. 5, pp. 394406.

12. Kerimov V.Yu., Lapidus A.L., Yandarbiev N.Sh. et al., Phys icochemical properties of shale strata in the Maikop series of Ciscaucasia, Solid Fuel Chemistry, 2017, V. 51, no. 2, pp. 122130.

13. Kerimov V.Yu., Serikova U.S., Mustaev R.N., Guliev I.S., Deep oil-and-gas content of South Caspian Basin (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2014, no. 5, pp. 5054.

14. Kerimov V.Yu., Shilov G.Ya., Mustaev R.N., Dmitrievskiy S.S., Thermobaric conditions of hydrocarbons accumulations  formation in the low-permeability oil reservoirs of Khadum suite of the Pre-Caucasus (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2016, no. 2, pp. 811.

15. Kerimov V.Y., Osipov A.V., Mustaev R.N., Monakova A.S., Modeling of petroleum systems in regions with complex geological structure, Proceedings of 16th Science and Applied Research Conference on Oil and Gas Geological Exploration and Development, Geomodel 2014.

16. Guliev I.S., Kerimov V.Yu., Mustaev R.N., Fundamental challenges of the location of oil and gas in the South Caspian Basin, Doklady Earth Sciences, 2016, V. 471, no. 1, pp. 11091112.

17. Osipov A.V., Monakova A.S., Zakharchenko M.V., Mustaev R.N., Assessment of caprock fluid-resistive characteristics of Pre-Urals Fore Deep Southern part, Proceedings of 17th Scientific-Practical Conference on Oil and Gas Geological Exploration and Development, Geomodel 2015, 2015.



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