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

Jia, Zejiang; Ning, Zhengfu; Yang, Guixia; Zhang, Wentong; Cheng, Zhi‐Lin; Zhu, Min

doi:10.1007/s11242-022-01797-1

Cited by 7 publications

(6 citation statements)

References 48 publications

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“…The negative charge gathered on the tight sandstone wall adsorbs positive ions in water to form a double electric layer (EDL), and the directional migration of ions in the double electric layer under the action of electric field is called electroosmosis. ,, When the pores are saturated with pure water, the pressure causes all water molecules to move forward evenly, forming a flat velocity profile, (Figure a). Also, when the pores are saturated with brine, the ions in EDL will hinder the migration of water molecules due to the wall attraction, resulting in faster migration of water molecules away from the wall (Figure b). ,, …”

Section: Eeor Mechanismmentioning

confidence: 99%

“…Also, when the pores are saturated with brine, the ions in EDL will hinder the migration of water molecules due to the wall attraction, resulting in faster migration of water molecules away from the wall (Figure 13b). 14,18,22 However, under the action of the DC electric field, the positive ions concentrated in the EDL will carry water molecules to the negative electrode under the friction (Figure 13c), 9,18,22 and the water molecules in the EDL near the wall will migrate faster. Therefore, in the two flow forms dominated by pressure and voltage, the ion transport in EDL appears as the resistance and the power of the water molecule movement, respectively.…”

Section: Eeor Mechanismmentioning

confidence: 99%

“…8−11 Recently, we have found that the effect of a DC electric field can alter the wettability of rocks and redistribute fluids in the pores. 9 Therefore, it is of fundamental and practical importance to evaluate the potential of a DC electric field to efficiently and effectively enhance oil recovery in a tight oil reservoir.…”

Section: Introductionmentioning

confidence: 99%

“…Although these methods reduce energy loss during oil migration, it is difficult to replenish the formation energy through water/gas injection with tight oil production, and the lack of driving power leads to poor development performance. Numerous studies have shown that the direct current (DC) electric field imposes a significant impact on the flow within micro/nanotubes, and its appropriate direction and intensity can increase the electroosmotic flow and reduce the flow resistance. − Recently, we have found that the effect of a DC electric field can alter the wettability of rocks and redistribute fluids in the pores . Therefore, it is of fundamental and practical importance to evaluate the potential of a DC electric field to efficiently and effectively enhance oil recovery in a tight oil reservoir.…”

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: 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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“…Wettability is a critical parameter of reservoirs, influencing the distribution of oil and water in the pore channels . In addition, wettability directly controls the flow behavior of fluids. , The wettability in a water–oil–rock system is the result of the interaction between water and oil at the interfaces and reflects the tendency of a fluid to spread over the solid surface of the porous rock .…”

Section: Introductionmentioning

confidence: 99%

Insights into the Relationship between Wettability and Surface Roughness in Tight Reservoirs from a Pore-Scale View: Effect of Electric Field

et al. 2023

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The surface roughness of reservoirs detected by AFM is typically employed to predict the wettability of a sandstone reservoir. However, the resulting predictive relationship represents the surface roughness in only the intragranular region due to the limitations of the AFM probe. For a long time, the detection of surface roughness in the intergranular region, especially that of a sandstone reservoir treated with an external stimulus, has not attracted much attention. This paper proposed an in situ AFM and SEM method for measuring the surface roughness in the different regions of tight sandstone treated with an electric field, further revealing the wettability alteration from a pore-scale perspective. The results show that the electric field exposure increases the surface roughness in the intragranular and intergranular regions, synthetically strengthening the water-wetness of tight sandstone. Notably, pore parameter changes in the intragranular region differ from those in the intergranular region. Pore length decreases in the intragranular region and also in the intergranular region, and pore number remains unchanged in the intragranular region but decreases in the intergranular region. Moreover, pore depth increases in the intragranular region but decreases in the intergranular region. The movement of clay minerals induced by the electric field accounts for the difference in the roughness alteration in the two regions. This paper sheds light on new ways to approach surface roughness measurement that can greatly improve the understanding of the relationship between surface roughness and wettability of reservoirs. In addition, the work presented in this paper may be vital in determining the surface roughness of homogeneous materials treated by external stimulation.

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

Cited by 7 publications

References 48 publications

Laboratory Evaluation of Electrically Enhanced Oil Recovery in Tight Reservoirs

Laboratory Evaluation of Electrically Enhanced Oil Recovery in Tight Reservoirs

Insights into the Relationship between Wettability and Surface Roughness in Tight Reservoirs from a Pore-Scale View: Effect of Electric Field

Evaluation of fracturing fluid imbibition and water blocking behavior in unconventional reservoir

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