A Comprehensive Simulation Study of Physicochemical and Geochemical Interactions on Immiscible CO 2 -LSWAG Injection in Carbonates

Ladislane dos Santos Bastos, Igor Emanuel da Silva Lins, Gloria Meyberg Nunes Costa and Silvio Alexandre Beisl Vieira de Melo ()
Additional contact information
Ladislane dos Santos Bastos: Programa de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, Brazil
Igor Emanuel da Silva Lins: Programa de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, Brazil
Gloria Meyberg Nunes Costa: Programa de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, Brazil
Silvio Alexandre Beisl Vieira de Melo: Programa de Pós-Graduação em Engenharia Industrial, Escola Politécnica, Universidade Federal da Bahia, Rua Aristides Novis, 2, Federação, Salvador 40210-630, Bahia, Brazil

Energies, 2022, vol. 16, issue 1, 1-23

Abstract: Low-salinity water-alternating-CO 2 (CO 2 -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 2 and CO 2 -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 4 2− and Mg 2+ 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 2 (62%) and CO 2 -LSWAG (85%), even in immiscible conditions. The mineral dissolution and porosity variations were more pronounced for CO 2 -LSWAG than CO 2 . The simulation results showed that Mg 2+ as an interpolant improves oil recovery more than SO 4 2− because Mg 2+ concentration in the aqueous phase after LSW injection leads to relative permeability values, which are more favorable.

Keywords: immiscible CO 2; CO 2 -LSWAG; carbonate; physicochemical simulation; geochemical simulation; interpolants (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/16/1/440/pdf (application/pdf)
https://www.mdpi.com/1996-1073/16/1/440/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:16:y:2022:i:1:p:440-:d:1020447

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().