Electrochemical Technologies for Petroleum Contaminated Soils

Pamukcu, Sibel

doi:10.1007/978-3-030-68140-1_18

Cited by 6 publications

(8 citation statements)

References 151 publications

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“…Although the time used for each coreflood experiment is different, the injection pressure remains stable after displacement for 24 h. In this case, the injection pressures during the first 24 h of displacement can be used for comparison and analysis. As shown in Figure 4a, the injection pressure of cores N1−N4 during waterflooding starts to rise rapidly from about 2 h and then reaches its stable value above 19 4c). As such, the change in the injection pressure is positively correlated to the electric field intensity.…”

Section: Effect Of DC Electric Field As Shown In Figurementioning

confidence: 91%

“…The application of a DC electric field leads to the electrolysis of brine and enhances the electrochemical reactions of tight sandstone, which is finally manifested as mineral dissolution and clay content change. Among them, the electrode reactions equation of H + and OH – generated by brine electrolysis are as follows: 2 H 2 normalO − 4 e − → O 2 + 4 H + ( anode ) 2 H 2 normalO + 2 e − → H 2 + 2 OH − ( cathode ) …”

Section: Eeor Mechanismmentioning

confidence: 99%

“…Meanwhile, the main electrochemical reactions in tight sandstone are as follows , : CaCO 3 + 2 H + → Ca 2 + + CO 2 + H 2 normalO ( dissolution of calcite ) 2 KAlSi 3 O 8 + CO 2 + 2 H 2 normalO → 2 K + + CO 3 2 − + 4 SiO 2 + Al 2 Si 2 O 5 false( OH false) 4 ( kaolinization of orthoclase ) .25ex2ex montmorillonite + 4.5 K + + 8 Al 3 + → illite + Na + + 2 Ca 2 + + 2.5 Fe 3 + infix+ 2 Mg 2 + + 3 Si 4 + ( illitization of montmorillonite ) …”

Section: Eeor Mechanismmentioning

confidence: 99%

“…8,17,18 Joule heating is dictated by the oil−water electrical resistivity ratio, while the degree of electrochemical enhancement is determined by the mineral composition, pore size of reservoir rocks, and ionic composition of the solutions. 12,16,19 Obviously, the pore size is a vital factor affecting the EOR performance with the DC electric field. Due to the fact that micro/nanopores have a very large surface−volume ratio and the rapidly increasing contact area between fluids and rock affects fluid flow (significant boundary layer effects) on its surface, 17,20 wettability as a macroscopic reflection of solid−liquid interactions is particularly important for exploiting a tight oil reservoir.…”

Section: Introductionmentioning

confidence: 99%

“…In a heavy oil reservoir, the Joule heating effect produced by the DC electric field is mainly used to reduce oil viscosity and flow resistance, thus enhancing oil recovery . Although the effect of the DC electric field varies with reservoir properties, the electroosmosis is mainly affected by ion concentration and pore size. ,, Joule heating is dictated by the oil–water electrical resistivity ratio, while the degree of electrochemical enhancement is determined by the mineral composition, pore size of reservoir rocks, and ionic composition of the solutions. ,, Obviously, the pore size is a vital factor affecting the EOR performance with the DC electric field.…”

Section: Introductionmentioning

confidence: 99%

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Laboratory Evaluation of Electrically Enhanced Oil Recovery in Tight Reservoirs

Jia,

Ning,

Lyu

et al. 2023

Energy Fuels

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By coupling the electrokinetic phenomenon, the direct current (DC) electric field has recently been considered as a novel process to enhance oil recovery over waterflooding. We conducted a series of coreflood experiments to evaluate the performance of electrically enhanced oil recovery in tight reservoirs and identify the key underlying mechanisms. Results show that the oil recovery induced by the DC electric field is higher than that of waterflooding. The oil recovery increases first and then decreases with the enhancement of the DC electric field. Using 0.05 mol/L NaCl solution with 10 V voltage, the highest oil recovery of 55.6% was increased by 28.4% compared with the average oil recovery (43.3%) of waterflooding. Not only does electroosmosis reduce the required pressure from 19.20 to 15.89 MPa with its variation proportional to the DC voltage and ion concentration but also such an electrochemical reaction changes the core mineral compositions (i.e., increasing the clay content but decreasing the orthoclase and calcite content), evidenced by a decrease in both contact angle up to 27.34% and absolute zeta potential up to 22.21%. By reduction of the flow resistance of water and increase of the oil−water ratio, electroosmosis shortens the time for the water at the displacement front to reach the outlet and reduces the volumetric sweep efficiency. Meanwhile, electroosmosis causes a smooth velocity profile similar to the piston-like displacement and increases displacement efficiency. Once a reduction in volumetric sweep efficiency could not be offset by an increase in displacement efficiency, oil recovery would be first improved with an increase in both voltage and ion concentration and then decreased, among which the effect of ion concentration is not as significant as that of the voltage.

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Section: Effect Of DC Electric Field As Shown In Figurementioning

confidence: 91%

Section: Eeor Mechanismmentioning

confidence: 99%

Section: Eeor Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Laboratory Evaluation of Electrically Enhanced Oil Recovery in Tight Reservoirs

Jia,

Ning,

Lyu

et al. 2023

Energy Fuels

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Experimental Investigation on the Effect of Solid–Liquid Interface Charge Transport on Natural Porous Media Flow

et al. 2022

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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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Electrochemical Technologies for Petroleum Contaminated Soils

Cited by 6 publications

References 151 publications

Laboratory Evaluation of Electrically Enhanced Oil Recovery in Tight Reservoirs

Laboratory Evaluation of Electrically Enhanced Oil Recovery in Tight Reservoirs

Experimental Investigation on the Effect of Solid–Liquid Interface Charge Transport on Natural Porous Media Flow

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

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