Effect of individual ions on rock-brine-oil interactions:A microcalorimetric approach
| Autor: | Erik Gydesen Søgaard, Jacquelin E. Cobos |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Calcite
Low salinity 020209 energy General Chemical Engineering Organic Chemistry Energy Engineering and Power Technology Isothermal titration calorimetry 02 engineering and technology Water flooding Endothermic process Ion chemistry.chemical_compound Single ions Fuel Technology 020401 chemical engineering chemistry Chemical engineering 0202 electrical engineering electronic engineering information engineering Fluid–fluid interactions 0204 chemical engineering Rock-fluid Mixture of ions |
| Zdroj: | Cobos, J E & Søgaard, E G 2021, ' Effect of individual ions on rock-brine-oil interactions : A microcalorimetric approach ', Fuel, vol. 290, 119955 . https://doi.org/10.1016/j.fuel.2020.119955 |
| DOI: | 10.1016/j.fuel.2020.119955 |
| Popis: | Understanding the mechanisms behind the additional oil recovery by low salinity water flooding (LSWF) in carbonates has been difficult because of the complexity of the crude oil + brine + rock system. This study is an attempt to isolate fluid–fluid and rock-fluid interactions through Isothermal Titration Calorimetry (ITC) to get a deeper understanding of the oil recovery process. The results from the fluid–fluid interactions pointed out that the observed endothermic response is determined by the formation of micro-dispersions, in which Mg2+ is more active than Ca2+. The incorporation of Ca2+, Mg2+, SO42- and HCO3- onto the chalk lattice effectively does not need energy from the surroundings to proceed. On the other hand, the incorporation of Mg2+ or Ca2+ into the calcite structure in the presence of SO42- is less energetically favorable due to pair creation. |
| Databáze: | OpenAIRE |
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