Investigation of Dynamic Swelling and Interfacial Tension of Crude Oil/Brine in the Presence of

Mohammadi, Amir H.; Chahardowli, Mohammad; Simjoo, Mohammad

doi:10.3997/2214-4609.202012053

Cited by 3 publications

(7 citation statements)

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“…As depicted in Figure , with increasing the temperature from 30 to 75 °C, the IFT decreased consistently for all tested EDTA concentrations (1, 3, 5, and 7 wt %). This behavior is consistent with the principles of interfacial chemistry and surfactant action. , The maximum recorded IFT of 20.43 mN/m was noted for 1 wt % EDTA solution at 30 °C. However, with increasing temperature to 75 °C, a notable decrease in IFT was observed, dropping to 11.07 mN/m.…”

Section: Resultssupporting

confidence: 87%

“…However, at higher concentrations, asphaltenes can aggregate and form larger structures. These larger structures may not be as effective at reducing IFT. , Moreover, high-density and high-viscosity fluids typically have higher IFT because they have greater molecular complexity and are less mobile, making it more difficult for them to spread and mix with other fluids at the interface. , …”

Section: Resultsmentioning

confidence: 99%

“…85,86 Moreover, high-density and high-viscosity fluids typically have higher IFT because they have greater molecular complexity and are less mobile, making it more difficult for them to spread and mix with other fluids at the interface. 83,87 As can be seen, by increasing the salinity from DIW to 1.5 SW, the IFT consistently decreased. This observation indicates the direct influence of water's ionic strength on the IFT between these two immiscible phases.…”

Section: ■ Experimental Sectionmentioning

confidence: 86%

“…This behavior is consistent with the principles of interfacial chemistry and surfactant action. 26,84 The maximum recorded IFT of 20.43 mN/m was noted for 1 wt % EDTA solution at 30 °C. However, with increasing temperature to 75 °C, a notable decrease in IFT was observed, dropping to 11.07 mN/m.…”

Section: ■ Experimental Sectionmentioning

confidence: 96%

“…First, as the temperature rises, the energy required to break intermolecular forces between two phases decreases. 26,83,84 Second, higher temperatures result in greater molecular motion and disorder (entropy) in the system. 98,99 This increased molecular motion allows EDTA molecules to diffuse more readily at the interface.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

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Unraveling the Impact of Ethylenediaminetetraacetic Acid Chelating Agents on the Oil Recovery Processes: An Insight into Its Role in Fluid–Fluid and Rock–Fluid Interactions

Mohammadi Khanghah,

Parhizgar Keradeh

2024

Langmuir

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In recent years, chelating agents have garnered increasing attention due to their unique capabilities in addressing challenges associated with chemically enhanced oil recovery materials. Most previous studies have primarily focused on examining the influence of chelating agents on rock–fluid interactions. However, their effects on fluid–fluid interactions, specifically on interfacial tension (IFT) characteristics under various conditions, remain relatively unknown. This study investigates the effect of crucial reservoir parameters on the performance of ethylenediaminetetraacetic acid (EDTA) chelating agents in the IFT between crude oil and brine. Furthermore, the study evaluated the impact of varying concentrations of this agent on rock wettability alteration, zeta potential, and spontaneous imbibition. The results illustrated that introducing EDTA at high concentration into seawater (SW) solution reduced the IFT by 85%. Additionally, while higher pH levels contributed to IFT reduction due to increased hydroxyl ions, excessive salinity levels resulted in elevated IFT. Raising the temperature from 30 to 75 °C further decreased the IFT, changing the IFT for optimal EDTA concentration from 20.43 to 2.56 mN/m (∼88% reduction). The changes in zeta potential and contact angle measurements indicated that solutions of 5 and 7 wt % EDTA shifted rock wettability from oil-wet to strongly water-wet, resulting in the wettability alteration index of 1.01 and 1.02, respectively. Inductively coupled plasma analysis, on the other hand, revealed substantial chelation of metal ions from both the solution and rock when EDTA was added to the rock/SW system. This resulted in a significant increase in Ca2+ ions and a decrease in Mg2+ ions, attributed to the multi-ion exchange phenomenon.

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Section: Resultssupporting

confidence: 87%