Modeling of petroleum system influenced by intrusive bodies

UDK: 550.8.072
DOI: 10.24887/0028-2448-2018-1-12-17
Key words: sills, source rocks, 3D basin modeling, oil and gas potential forecast
Authors: A.V. Polischuk (TNNC LLC, RF, Tyumen), M.V. Lebedev (TNNC LLC, RF, Tyumen), A.N. Perepelina (Schlumberger, RF, Tyumen)

The methodological approaches used to assess the resource potential of basins in which there are sills intrusions significantly differ from basins without intrusions. The source rock maturity in these basins is caused not only by the intensity of the heat flow and burial depth of deposits, but also, to a large extent, by the intense temperature influence of the sills on the host rock. In addition, it was found that timing of the intrusion has a great influence on the maturity of the underlying source rocks.

The purpose of this study is to improve the methodology for modeling oil and gas basins which are influenced by intensive intrusive processes. The South Americas sedimentary basin is used as an example.

To determine the timing of the sill intrusions in the overlying formations and to forecast oil and gas potential, the basin modeling method was applied. Its essence lies in the detailed modeling of the basins evolution correlated with the processes of generation, migration, accumulation of hydrocarbons, and oil and gas losses. Based on the results of basin modeling, it has been established that the thickness of the sediments between sill's bottom and top of source rocks is one of the key factors controlling the maturity and phase composition of hydrocarbons in the traps. It was found that the sills intensively deform the overlying, rather than underlying, sediments. Positive and negative structural deformations that are absent in the underlying sediments are observed above the sills. The correlation analysis of the sills' thickness makes it possible to determine the timing of their intrusion into the sedimentary cover. As a result it was determined that the lowest intrusion was the earliest.

The obtained results became the scientific basis for building a three-dimensional digital geological model of the studied basin.

References

1. Magoon L.B., Dow W.G., The petroleum system, AAPG Memoir 60, 1994, pp. 324.

2. Hantschel T., Konerauf A.S., Fundamentals of basin and petroleum system modeling, Springer, 2009, 476 p.

3. URL: https://www.rosneft.ru/press/news/item/185727/

4. Mello M.R., Goncalves G.T., Babinsky N.A., Miranda F.P., Hydrocarbon prospecting in the Amazon rain forest: application of surface geochemical, microbiological and remote sensing methods, AAPG Memoir 66, 1996, pp. 401411.

5. Meyn S.V., Vvedenie v teoriyu stratigrafii (Introduction to the theory of stratigraphy), Moscow: Nauka Publ., 1989, 216 p.

6. Khusnitdinov R.R., Trappovyy magmatizm kriteriy prognoza treshchinovatosti karbonatnykh otlozheniy dokembriya na Kuyumbinskom mestorozhdenii (Trap magmatism is the criterion for predicting the fracture of Precambrian carbonate deposits in the Kuyumbinskoye field), Proceedings of EAGE Geomodel 2013, pp. 15.

7. Levinson-Lessing F.Yu., Ginzberg A.S., Dilaktorskiy N.L., Trappy Tuluno-Udinskogo i Bratskogo rayonov v Vostochnoy Sibiri (Trappes of Tuluno-Udinsky and Bratsk districts in Eastern Siberia), Proceedings of Council for the Study of Production Forces, 1932, 82 p.

8. Staroseltsev V.S., Tektonika bazaltovykh plato i neftegazonosnost podstilayushchikh otlozheniy (Tectonics of basalt plateaus and oil and gas content of underlying deposits), Moscow: Nedra Publ., 1989, 257 p.

9. Migurskiy A.V., Popelukha G.F., Staroseltsev V.S., Khomenko A.V., Vliyanie trappovogo magmatizma na neftegazonosnost oblastey Sibirskoy platformy (Effect of trap magmatism on the oil and gas potential of the Siberian platform), Collected papers Flyuidodinamicheskiy faktor v tektonike i neftegazonosnosti osadochnykh basseynov (Fluid dynamic factor in tectonics and petroleum potential of sedimentary basins), Moscow: Nauka Publ., 1989, pp. 8589.

10. Staroseltsev V.S., Lebedev V.M., Svyaz intruzivnogo magmatizma s tektonikoy Tungusskoy sineklizy (The relationship of intrusive magmatism with tectonics of the Tunguska syneclise), Proceedings of SNIIGIMS,1975, V. 217, pp. 100108.

11. Filho J.R.W., Travassos W.A.S., Alves D.B., O diabasio nas bacias paleozoicas amazonicas heroi ou vilao?, Boletim de Geociencias Petrobras, 2006, V. 14, no. 1, pp. 177184.

12. Holford S.P., Schofield N., Jackson C. et al., Impacts of igneous intrusions on source and reservoir potential in prospective sedimentary basins along the western Australian continental margin, Australia, Perth: Petroleum Exploration Society of Australia special publication, 2013, 12 p.

The methodological approaches used to assess the resource potential of basins in which there are sills intrusions significantly differ from basins without intrusions. The source rock maturity in these basins is caused not only by the intensity of the heat flow and burial depth of deposits, but also, to a large extent, by the intense temperature influence of the sills on the host rock. In addition, it was found that timing of the intrusion has a great influence on the maturity of the underlying source rocks.

The purpose of this study is to improve the methodology for modeling oil and gas basins which are influenced by intensive intrusive processes. The South Americas sedimentary basin is used as an example.

To determine the timing of the sill intrusions in the overlying formations and to forecast oil and gas potential, the basin modeling method was applied. Its essence lies in the detailed modeling of the basins evolution correlated with the processes of generation, migration, accumulation of hydrocarbons, and oil and gas losses. Based on the results of basin modeling, it has been established that the thickness of the sediments between sill's bottom and top of source rocks is one of the key factors controlling the maturity and phase composition of hydrocarbons in the traps. It was found that the sills intensively deform the overlying, rather than underlying, sediments. Positive and negative structural deformations that are absent in the underlying sediments are observed above the sills. The correlation analysis of the sills' thickness makes it possible to determine the timing of their intrusion into the sedimentary cover. As a result it was determined that the lowest intrusion was the earliest.

The obtained results became the scientific basis for building a three-dimensional digital geological model of the studied basin.

References

1. Magoon L.B., Dow W.G., The petroleum system, AAPG Memoir 60, 1994, pp. 324.

2. Hantschel T., Konerauf A.S., Fundamentals of basin and petroleum system modeling, Springer, 2009, 476 p.

3. URL: https://www.rosneft.ru/press/news/item/185727/

4. Mello M.R., Goncalves G.T., Babinsky N.A., Miranda F.P., Hydrocarbon prospecting in the Amazon rain forest: application of surface geochemical, microbiological and remote sensing methods, AAPG Memoir 66, 1996, pp. 401411.

5. Meyn S.V., Vvedenie v teoriyu stratigrafii (Introduction to the theory of stratigraphy), Moscow: Nauka Publ., 1989, 216 p.

6. Khusnitdinov R.R., Trappovyy magmatizm kriteriy prognoza treshchinovatosti karbonatnykh otlozheniy dokembriya na Kuyumbinskom mestorozhdenii (Trap magmatism is the criterion for predicting the fracture of Precambrian carbonate deposits in the Kuyumbinskoye field), Proceedings of EAGE Geomodel 2013, pp. 15.

7. Levinson-Lessing F.Yu., Ginzberg A.S., Dilaktorskiy N.L., Trappy Tuluno-Udinskogo i Bratskogo rayonov v Vostochnoy Sibiri (Trappes of Tuluno-Udinsky and Bratsk districts in Eastern Siberia), Proceedings of Council for the Study of Production Forces, 1932, 82 p.

8. Staroseltsev V.S., Tektonika bazaltovykh plato i neftegazonosnost podstilayushchikh otlozheniy (Tectonics of basalt plateaus and oil and gas content of underlying deposits), Moscow: Nedra Publ., 1989, 257 p.

9. Migurskiy A.V., Popelukha G.F., Staroseltsev V.S., Khomenko A.V., Vliyanie trappovogo magmatizma na neftegazonosnost oblastey Sibirskoy platformy (Effect of trap magmatism on the oil and gas potential of the Siberian platform), Collected papers Flyuidodinamicheskiy faktor v tektonike i neftegazonosnosti osadochnykh basseynov (Fluid dynamic factor in tectonics and petroleum potential of sedimentary basins), Moscow: Nauka Publ., 1989, pp. 8589.

10. Staroseltsev V.S., Lebedev V.M., Svyaz intruzivnogo magmatizma s tektonikoy Tungusskoy sineklizy (The relationship of intrusive magmatism with tectonics of the Tunguska syneclise), Proceedings of SNIIGIMS,1975, V. 217, pp. 100108.

11. Filho J.R.W., Travassos W.A.S., Alves D.B., O diabasio nas bacias paleozoicas amazonicas heroi ou vilao?, Boletim de Geociencias Petrobras, 2006, V. 14, no. 1, pp. 177184.

12. Holford S.P., Schofield N., Jackson C. et al., Impacts of igneous intrusions on source and reservoir potential in prospective sedimentary basins along the western Australian continental margin, Australia, Perth: Petroleum Exploration Society of Australia special publication, 2013, 12 p.



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