A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in Carbonates
Low-salinity water-alternating-CO<sub>2</sub> (CO<sub>2</sub>-LSWAG) injection has been widely studied and employed due to its capability to promote enhanced oil recovery (EOR). However, there is no consensus on the dominant mechanisms for oil recovery in carbonates due to th...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/1/440 |
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| author | Ladislane dos Santos Bastos Igor Emanuel da Silva Lins Gloria Meyberg Nunes Costa Silvio Alexandre Beisl Vieira de Melo |
| author_facet | Ladislane dos Santos Bastos Igor Emanuel da Silva Lins Gloria Meyberg Nunes Costa Silvio Alexandre Beisl Vieira de Melo |
| author_sort | Ladislane dos Santos Bastos |
| collection | DOAJ |
| description | Low-salinity water-alternating-CO<sub>2</sub> (CO<sub>2</sub>-LSWAG) injection has been widely studied and employed due to its capability to promote enhanced oil recovery (EOR). However, there is no consensus on the dominant mechanisms for oil recovery in carbonates due to the extreme complexity of the oil–brine–rock interactions. This work proposes a comparative investigation of the physicochemical and geochemical effects of continuous CO<sub>2</sub> and CO<sub>2</sub>-LSWAG immiscible injections on oil recovery in a carbonate core. Simulations were carried out using oil PVT properties and relative permeability experimental data from the literature. A comparison of SO<sub>4</sub><sup>2−</sup> and Mg<sup>2+</sup> as interpolant ions, oil, water and gas production, pressure, and rock and fluid properties along the core and in the effluent was made. The results show a high recovery factor for CO<sub>2</sub> (62%) and CO<sub>2</sub>-LSWAG (85%), even in immiscible conditions. The mineral dissolution and porosity variations were more pronounced for CO<sub>2</sub>-LSWAG than CO<sub>2</sub>. The simulation results showed that Mg<sup>2+</sup> as an interpolant improves oil recovery more than SO<sub>4</sub><sup>2−</sup> because Mg<sup>2+</sup> concentration in the aqueous phase after LSW injection leads to relative permeability values, which are more favorable. |
| first_indexed | 2024-03-11T10:01:58Z |
| format | Article |
| id | doaj.art-6c5ed2c9d70748a98ceffe62d0363822 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T10:01:58Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-6c5ed2c9d70748a98ceffe62d03638222023-11-16T15:19:12ZengMDPI AGEnergies1996-10732022-12-0116144010.3390/en16010440A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in CarbonatesLadislane dos Santos Bastos0Igor Emanuel da Silva Lins1Gloria Meyberg Nunes Costa2Silvio Alexandre Beisl Vieira de Melo3Programa de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, BrazilPrograma de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, BrazilPrograma de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, BrazilPrograma de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, BrazilLow-salinity water-alternating-CO<sub>2</sub> (CO<sub>2</sub>-LSWAG) injection has been widely studied and employed due to its capability to promote enhanced oil recovery (EOR). However, there is no consensus on the dominant mechanisms for oil recovery in carbonates due to the extreme complexity of the oil–brine–rock interactions. This work proposes a comparative investigation of the physicochemical and geochemical effects of continuous CO<sub>2</sub> and CO<sub>2</sub>-LSWAG immiscible injections on oil recovery in a carbonate core. Simulations were carried out using oil PVT properties and relative permeability experimental data from the literature. A comparison of SO<sub>4</sub><sup>2−</sup> and Mg<sup>2+</sup> as interpolant ions, oil, water and gas production, pressure, and rock and fluid properties along the core and in the effluent was made. The results show a high recovery factor for CO<sub>2</sub> (62%) and CO<sub>2</sub>-LSWAG (85%), even in immiscible conditions. The mineral dissolution and porosity variations were more pronounced for CO<sub>2</sub>-LSWAG than CO<sub>2</sub>. The simulation results showed that Mg<sup>2+</sup> as an interpolant improves oil recovery more than SO<sub>4</sub><sup>2−</sup> because Mg<sup>2+</sup> concentration in the aqueous phase after LSW injection leads to relative permeability values, which are more favorable.https://www.mdpi.com/1996-1073/16/1/440immiscible CO<sub>2</sub>CO<sub>2</sub>-LSWAGcarbonatephysicochemical simulationgeochemical simulationinterpolants |
| spellingShingle | Ladislane dos Santos Bastos Igor Emanuel da Silva Lins Gloria Meyberg Nunes Costa Silvio Alexandre Beisl Vieira de Melo A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in Carbonates Energies immiscible CO<sub>2</sub> CO<sub>2</sub>-LSWAG carbonate physicochemical simulation geochemical simulation interpolants |
| title | A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in Carbonates |
| title_full | A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in Carbonates |
| title_fullStr | A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in Carbonates |
| title_full_unstemmed | A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in Carbonates |
| title_short | A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO<sub>2</sub>-LSWAG Injection in Carbonates |
| title_sort | comprehensive simulation study of physicochemical and geochemical interactions on immiscible co sub 2 sub lswag injection in carbonates |
| topic | immiscible CO<sub>2</sub> CO<sub>2</sub>-LSWAG carbonate physicochemical simulation geochemical simulation interpolants |
| url | https://www.mdpi.com/1996-1073/16/1/440 |
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