Prospects for the opening of the hydrocarbon deposits in non-structural traps of Paleo-Volga

UDK: 550.8.012
DOI: 10.24887/0028-2448-2018-5-18-23
Key words: non-structural traps, Volga paleochannel, hydrocarbons deposits, vertical migration, delta of Paleo-Volga, gas anomalies
Authors: V.I. Popkov (Kuban State University, RF, Krasnodar), I.I. Tverdokhlebov (Kuban State University, RF, Krasnodar)

At the area covered by North and Middle Caspian Sea we allocated thick geological body – Paleo-Volga, which extends to the northern border of the Apsheronian basin. Its length is more than 600 km with a width of 10-25 km. There is ample research which testifies that 58 % of deposits are linked with paleochannels. Sediments of paleochannels are represented by interbedding of sands and clays. The formation of hydrocarbon deposits and non-structural traps are associated with the vertical migration of fluids fr om great depths. The article presents the perspective directions of exploration works with a view to identifying hydrocarbons deposits in non-anticlinal traps of Paleo-Volga. We mean sediments Paleo-Volga area, contrasting anomaly associated with paleochannel partial barrier in Samur-Peschanomyssk zone of uplift, and gas anomaly along the border of Khvalynsk-Sarmatian uplift zone.

According to obtained results the following conclusions were made. Paleo-Volga extends from north to south for a great distance. Indirect confirmation of the formation of deposits in the non-anticlinal traps of paleochannel is a fluid accumulation in small depths widely developed in the Northern Caspian Sea.

On the basis of the assumptions of the accumulation of deposits in the sediments of the Paleo-Volga, exploration should be focused in delta of the Paleo-Volga.

We recommend sink a wildcat in zone of contrast anomalies near seismic profile No. 821005 wh ere there is a paleochannel partial barrier in Samur-Peschanomyssk uplift zone. To refine borders of allocated gas anomalies zones which is linearly stretched along the border Khvalynsk-Sarmatian uplift zone it necessary to conduct additional geochemical studies.

References

1. Popkov V.I, Tverdokhlebov I.I., Features mining of sea hydrocarbon fields and direction prospecting work in the Caspian Sea water area (In Russ.), GeoInzhiniring, 2014, no. 12, pp. 64-68

2. Popkov V.I., Osnovnye cherty geologicheskogo stroeniya Srednego Kaspiya i prilegayushchey sushi. Tektonika i geodinamika (The main features of the geological structure of the Middle Caspian and adjacent land. Tectonics and geodynamics), Stavropol': Publ. of SevKavGTU, 2000, pp. 28–55.

3. Gadzhiev A.N., Popkov V.I., New data on the geology of the Middle Caspian (In Russ.), Doklady AN SSSR, 1988, V. 299, no. 3, pp. 682–685.

4. Gadzhiev A.N., Popkov V.I., Structural features of the sedimentary cover of the Middle Caspian (In Russ.), Geotektonika, 1988, no. 6, pp. 116–128.

5. Khain V.E., Popkov V.I., Chekhovich P.A., Origin and main regularities of tectonic development of the South Caspian basin (In Russ.), Yuzhno-Rossiyskiy vestnik geologii, geografii global'noy energii, 2004, no. 3 (9), V. I, pp. 159–163.

6. Oknova N.S., Nonanticlinal traps – examples from Volga-Ural and Western Siberia oil-and-gas provinces (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2012, V. 7, no. 1, pp. 1–14.

7. Sabanaev K.A., Sabanaev A.K., Ustanovlennye i prognoziruemye tipy lovushek nefti i gaza na Rossiyskom sektore Kaspiya (Determined and projected types of oil and gas traps in the Russian sector of the Caspian Sea), In “Sostoyanie i perspektivy neftedobychi v Dagestane” (State and prospects of oil production in Dagestan), Makhachkala: Publ. of , 2014, pp. 16–21.

8. Guliev I.S., Levin L.E., Fedorov D.L., Uglevodorodnyy potentsial Kaspiyskogo regiona (sistemnyy analiz) (Hydrocarbon potential of the Caspian region (system analysis)), Baku: Nafta-Press Publ., 2003, 127 p.

9. Averbukh B.M., Alieva S.A., Prospects of oil and gas content of suprasalt (Upper Permian-Mesozoic) formations of the Northern Caspian (In Russ.), Geologiya nefti i gaza, 1992, no. 9, pp. 9–14.

10. Volozh Yu.A., Dmitrievskiy A.N., Leonov M.G. et al., International project for Caspian regional geosciences survey of the deep structure (In Russ.), Georesursy, Geoenergetika, Geopolitika, 2010, no. 1.

11. Murzin Sh.M., Geologicheskoe stroenie i perspektivy neftegazonosnosti akvatorii Srednego i Severnogo Kaspiya (Geological structure and prospects of oil and gas potential in the water area of the Middle and Northern Caspian), Thesis of candidate of geological and mineralogical sciences, Moscow, 2010, 123 p.

12. Anisimov L.A., The gas content of the Pliocene sediments of the Northern Caspian (In Russ.), Yuzhno-rossiyskiy vestnik geologii, geografii i global'noy energii, 2006, no. 4, pp. 100-107.

13. Tverdokhlebova L.L., Geoecological problems of development of the Caspian water area and ways to solve them (In Russ.), Geologiya, geografiya i global'naya energiya, 2009, no. 2, pp. 56–59.

14. Markovskiy N.I., Paleogeograficheskie osnovy poiskov nefti i gaza (Paleogeographic foundations of oil and gas exploration), Moscow: Nedra Publ., 1973, 304 p.

15. Vasil'ev Yu.M., Obryadchikov O.S., Perspektivy gazoneftenosnosti pliotsenovykh otlozheniy Prikaspiyskoy vpadiny (Prospects of gas-and-gas content of the Pliocene sediments of the Caspian depression), Moscow: Gostoptekhizdat Publ., 1962, 180 p.вЃ 

At the area covered by North and Middle Caspian Sea we allocated thick geological body – Paleo-Volga, which extends to the northern border of the Apsheronian basin. Its length is more than 600 km with a width of 10-25 km. There is ample research which testifies that 58 % of deposits are linked with paleochannels. Sediments of paleochannels are represented by interbedding of sands and clays. The formation of hydrocarbon deposits and non-structural traps are associated with the vertical migration of fluids fr om great depths. The article presents the perspective directions of exploration works with a view to identifying hydrocarbons deposits in non-anticlinal traps of Paleo-Volga. We mean sediments Paleo-Volga area, contrasting anomaly associated with paleochannel partial barrier in Samur-Peschanomyssk zone of uplift, and gas anomaly along the border of Khvalynsk-Sarmatian uplift zone.

According to obtained results the following conclusions were made. Paleo-Volga extends from north to south for a great distance. Indirect confirmation of the formation of deposits in the non-anticlinal traps of paleochannel is a fluid accumulation in small depths widely developed in the Northern Caspian Sea.

On the basis of the assumptions of the accumulation of deposits in the sediments of the Paleo-Volga, exploration should be focused in delta of the Paleo-Volga.

We recommend sink a wildcat in zone of contrast anomalies near seismic profile No. 821005 wh ere there is a paleochannel partial barrier in Samur-Peschanomyssk uplift zone. To refine borders of allocated gas anomalies zones which is linearly stretched along the border Khvalynsk-Sarmatian uplift zone it necessary to conduct additional geochemical studies.

References

1. Popkov V.I, Tverdokhlebov I.I., Features mining of sea hydrocarbon fields and direction prospecting work in the Caspian Sea water area (In Russ.), GeoInzhiniring, 2014, no. 12, pp. 64-68

2. Popkov V.I., Osnovnye cherty geologicheskogo stroeniya Srednego Kaspiya i prilegayushchey sushi. Tektonika i geodinamika (The main features of the geological structure of the Middle Caspian and adjacent land. Tectonics and geodynamics), Stavropol': Publ. of SevKavGTU, 2000, pp. 28–55.

3. Gadzhiev A.N., Popkov V.I., New data on the geology of the Middle Caspian (In Russ.), Doklady AN SSSR, 1988, V. 299, no. 3, pp. 682–685.

4. Gadzhiev A.N., Popkov V.I., Structural features of the sedimentary cover of the Middle Caspian (In Russ.), Geotektonika, 1988, no. 6, pp. 116–128.

5. Khain V.E., Popkov V.I., Chekhovich P.A., Origin and main regularities of tectonic development of the South Caspian basin (In Russ.), Yuzhno-Rossiyskiy vestnik geologii, geografii global'noy energii, 2004, no. 3 (9), V. I, pp. 159–163.

6. Oknova N.S., Nonanticlinal traps – examples from Volga-Ural and Western Siberia oil-and-gas provinces (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2012, V. 7, no. 1, pp. 1–14.

7. Sabanaev K.A., Sabanaev A.K., Ustanovlennye i prognoziruemye tipy lovushek nefti i gaza na Rossiyskom sektore Kaspiya (Determined and projected types of oil and gas traps in the Russian sector of the Caspian Sea), In “Sostoyanie i perspektivy neftedobychi v Dagestane” (State and prospects of oil production in Dagestan), Makhachkala: Publ. of , 2014, pp. 16–21.

8. Guliev I.S., Levin L.E., Fedorov D.L., Uglevodorodnyy potentsial Kaspiyskogo regiona (sistemnyy analiz) (Hydrocarbon potential of the Caspian region (system analysis)), Baku: Nafta-Press Publ., 2003, 127 p.

9. Averbukh B.M., Alieva S.A., Prospects of oil and gas content of suprasalt (Upper Permian-Mesozoic) formations of the Northern Caspian (In Russ.), Geologiya nefti i gaza, 1992, no. 9, pp. 9–14.

10. Volozh Yu.A., Dmitrievskiy A.N., Leonov M.G. et al., International project for Caspian regional geosciences survey of the deep structure (In Russ.), Georesursy, Geoenergetika, Geopolitika, 2010, no. 1.

11. Murzin Sh.M., Geologicheskoe stroenie i perspektivy neftegazonosnosti akvatorii Srednego i Severnogo Kaspiya (Geological structure and prospects of oil and gas potential in the water area of the Middle and Northern Caspian), Thesis of candidate of geological and mineralogical sciences, Moscow, 2010, 123 p.

12. Anisimov L.A., The gas content of the Pliocene sediments of the Northern Caspian (In Russ.), Yuzhno-rossiyskiy vestnik geologii, geografii i global'noy energii, 2006, no. 4, pp. 100-107.

13. Tverdokhlebova L.L., Geoecological problems of development of the Caspian water area and ways to solve them (In Russ.), Geologiya, geografiya i global'naya energiya, 2009, no. 2, pp. 56–59.

14. Markovskiy N.I., Paleogeograficheskie osnovy poiskov nefti i gaza (Paleogeographic foundations of oil and gas exploration), Moscow: Nedra Publ., 1973, 304 p.

15. Vasil'ev Yu.M., Obryadchikov O.S., Perspektivy gazoneftenosnosti pliotsenovykh otlozheniy Prikaspiyskoy vpadiny (Prospects of gas-and-gas content of the Pliocene sediments of the Caspian depression), Moscow: Gostoptekhizdat Publ., 1962, 180 p.вЃ 



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