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Oil and gas accumulation zones based on 3D basin modeling, Solimoes basin, Jurua sub-basin, Brazil

UDK: 553.98.001
DOI: 10.24887/0028-2448-2019-10-19-23
Key words: oil and gas accumulation zone, intrusions, petroleum system modeling, geological exploration planning
Authors: A.V. Polischuk (Tyumen Petroleum Research Center LLC, RF, Tyumen), M.V. Lebedev (Tyumen Petroleum Research Center LLC, RF, Tyumen)

A case study of the Solimoes basin and the Jurua sub-basin (Brazil) illustrates and confirms the principles of identifying oil and gas accumulation zones. The main principle of identifying an oil and gas accumulation zone is the uniformity of oil and gas system elements. The elements and processes of the oil and gas system of the Jurua sub-basin are briefly described: reservoirs and seals, source rock, source rock maturity and phase composition of hydrocarbons (HC), tectonics and hydrocarbon traps, HC migration and accumulation, preservation of deposits. The critical factors of naftidogenesis for the Jurua formation, which contains the bulk of hydrocarbon reserves, are the presence and location of hydrocarbon kitchens relative to traps; the degree of maturity; the presence of structural trends which are the main HC accumulators. Thus, in accordance with the accepted definition of an oil and gas accumulation zone in the Jurua interval, these are its connected parts, including, as a rule, groups of structural trends with the same source and phase composition of hydrocarbons; four oil and gas accumulation zones were distinguished in the considered target which differ by sources of hydrocarbons and types of HC fluids and traps. The results of 3D basin modeling is the basis for justifying the assessment of sediments maturity, type of fluids, volumes and migration pathways, and the charge potential of specific traps. The results can be used as a basis for planning further geological exploration in the Jurua sub-basin.

At the moment, basin modeling sets the tasks to assess the traps charge and, therefore, the local hydrocarbon resources within the proven zones of oil and gas accumulation. This is the area for further exploration efforts.

References

1. Milani E.J., Zalan P.D., An outline of the geology and petroleum systems of the Paleozoic interior basins of South America, Episodes-Newsmagazine of the International Union of Geological Sciences, 1999, V. 22(2), pp. 199–205.

2. Polishchuk A.V., Lebedev M.V., Perepelina A.N., Modeling of petroleum system influenced by intrusive bodies (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 1, pp. 12–17.

3. Polishchuk A.V., Vliyanie trappovykh kompleksov na evolyutsiyu neftegazovoy sistemy (The influence of trap complexes on the evolution of the oil and gas system), Collected papers “Informatsionnye sistemy i tekhnologii v geologii i neftegazodobyche” (Information systems and technologies in geology and oil and gas production), Tyumen': Publ. of TIU, 2018, pp. 87–96.

4. Prishchepa O.M., Oil and gas accumulation zones - methodological approaches to their allocation, providing a modern solution to industry problems (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2008, no. 3, pp. 1–31.

5. Lebedev M.V., Petroleum accumulation zones in main Vendian terrigeneous reservoirs in north-east Nepa-Botuoba petroleum region (In Russ.), 2015, no. 1, pp. 20–26.

6. Janvier P., Melo J.H.G., Late Devonian actinopterygian scales from Upper Amazon basin, Nortwestern Brasil, Candido Simoes Ferreira, 1987, V. 59(3), pp. 213–218.

7. Magoon L.B., Dow W.G., The petroleum system, AAPG Memoir, 1994, no. 60, pp. 3–23.

8. Barata C.F., Caputo M.V., Geologia do petroleo da bacia do Solimoes. O “estado da arte”, PDPETRO, 2007, no. 4, pp. 1–10.

9. Caputo M.V., Silva O.B., Sedimentação e tectГґnica da Bacia do SolimГµes, Origem e Evolução das Bacias Sedimentares, 1991, pp. 169–193.

10. Almeida F.F.M., Neves B.B.B., Carneiro C.D.R., The origin and evolution of the South American Platform, Earth – Science Reviews, 2000, V. 50, pp. 77–111.

A case study of the Solimoes basin and the Jurua sub-basin (Brazil) illustrates and confirms the principles of identifying oil and gas accumulation zones. The main principle of identifying an oil and gas accumulation zone is the uniformity of oil and gas system elements. The elements and processes of the oil and gas system of the Jurua sub-basin are briefly described: reservoirs and seals, source rock, source rock maturity and phase composition of hydrocarbons (HC), tectonics and hydrocarbon traps, HC migration and accumulation, preservation of deposits. The critical factors of naftidogenesis for the Jurua formation, which contains the bulk of hydrocarbon reserves, are the presence and location of hydrocarbon kitchens relative to traps; the degree of maturity; the presence of structural trends which are the main HC accumulators. Thus, in accordance with the accepted definition of an oil and gas accumulation zone in the Jurua interval, these are its connected parts, including, as a rule, groups of structural trends with the same source and phase composition of hydrocarbons; four oil and gas accumulation zones were distinguished in the considered target which differ by sources of hydrocarbons and types of HC fluids and traps. The results of 3D basin modeling is the basis for justifying the assessment of sediments maturity, type of fluids, volumes and migration pathways, and the charge potential of specific traps. The results can be used as a basis for planning further geological exploration in the Jurua sub-basin.

At the moment, basin modeling sets the tasks to assess the traps charge and, therefore, the local hydrocarbon resources within the proven zones of oil and gas accumulation. This is the area for further exploration efforts.

References

1. Milani E.J., Zalan P.D., An outline of the geology and petroleum systems of the Paleozoic interior basins of South America, Episodes-Newsmagazine of the International Union of Geological Sciences, 1999, V. 22(2), pp. 199–205.

2. Polishchuk A.V., Lebedev M.V., Perepelina A.N., Modeling of petroleum system influenced by intrusive bodies (In Russ.), Neftyanoe khozyaystvo = Oil Industry, 2018, no. 1, pp. 12–17.

3. Polishchuk A.V., Vliyanie trappovykh kompleksov na evolyutsiyu neftegazovoy sistemy (The influence of trap complexes on the evolution of the oil and gas system), Collected papers “Informatsionnye sistemy i tekhnologii v geologii i neftegazodobyche” (Information systems and technologies in geology and oil and gas production), Tyumen': Publ. of TIU, 2018, pp. 87–96.

4. Prishchepa O.M., Oil and gas accumulation zones - methodological approaches to their allocation, providing a modern solution to industry problems (In Russ.), Neftegazovaya geologiya. Teoriya i praktika, 2008, no. 3, pp. 1–31.

5. Lebedev M.V., Petroleum accumulation zones in main Vendian terrigeneous reservoirs in north-east Nepa-Botuoba petroleum region (In Russ.), 2015, no. 1, pp. 20–26.

6. Janvier P., Melo J.H.G., Late Devonian actinopterygian scales from Upper Amazon basin, Nortwestern Brasil, Candido Simoes Ferreira, 1987, V. 59(3), pp. 213–218.

7. Magoon L.B., Dow W.G., The petroleum system, AAPG Memoir, 1994, no. 60, pp. 3–23.

8. Barata C.F., Caputo M.V., Geologia do petroleo da bacia do Solimoes. O “estado da arte”, PDPETRO, 2007, no. 4, pp. 1–10.

9. Caputo M.V., Silva O.B., Sedimentação e tectГґnica da Bacia do SolimГµes, Origem e Evolução das Bacias Sedimentares, 1991, pp. 169–193.

10. Almeida F.F.M., Neves B.B.B., Carneiro C.D.R., The origin and evolution of the South American Platform, Earth – Science Reviews, 2000, V. 50, pp. 77–111.


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