Modeling of two-phase ﬂow in heterogeneous wet porous media

Xiao, Yihang; He, Yongming; Zheng, Jun; Zhao, Jiuyu

doi:10.46690/capi.2022.03.01

Cited by 5 publications

(2 citation statements)

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“…The final recovery factors for IFT values of 35.1, 23.4, 3.51, and 2.34 mN/m are 40.5, 34.6, 22.5, and 21.3%, respectively. Additionally, in eq 18, 37 P c , σ, r, and θ represent the capillary force, IFT, capillary radius, and three-phase contact angle, respectively. The equation demonstrates that the capillary force is directly proportional to the IFT.…”

Section: Simulation Results and Analysismentioning

confidence: 99%

Further Study on the Effect of Interfacial Tension on Cocurrent Spontaneous Imbibition Based on Direct Simulation and NMR

Gong,

Li,

Wang

et al. 2023

Energy Fuels

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Due to the low permeability and small porosity, tight reservoirs are usually developed by volume fracturing of horizontal wells, and spontaneous imbibition is one of the important mechanisms. Capillary force is the dominant force for spontaneous imbibition in tight reservoirs. This paper presents a detailed study of spontaneous imbibition by a direct simulation method (Lattice Boltzmann method) and core experiments of nuclear magnetic resonance and proposes a method to characterize the degree of oil utilization on the core by using the variation of oil volume at the core cross section. It is found that the higher the interfacial tension, the higher the final recovery rate. The core is divided into four areas (the larger the area number, the farther away from the inlet) along the direction of spontaneous imbibition. At low interfacial tension, no significant snap-off is caused, but because of the lack of power, only the oil near the inlet can be effectively utilized and the other areas are hardly affected. However, at high interfacial tension, the spontaneous imbibition distance is long enough to utilize more oil, but because of the strong dynamics, the spontaneous imbibition front is unstable, which causes a more severe snap-off and generates more residual oil in each area. Based on the above observation, a compound interfacial tension method is proposed to reduce the snap-off and further improve the spontaneous imbibition recovery factor. The compound interfacial tension refers to the use of fluids with low and high interfacial tension in succession so that the advantages of both can be fully exploited. In this case, there is a significant reduction in the snap-off near the inlet, which also makes the spontaneous imbibition resistance reduced and the degree of utilization to the interior of the core increased.

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Section: Simulation Results and Analysismentioning

confidence: 99%

Further Study on the Effect of Interfacial Tension on Cocurrent Spontaneous Imbibition Based on Direct Simulation and NMR

Gong,

Li,

Wang

et al. 2023

Energy Fuels

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“…During the high water cut stage, the characteristic curve of waterflooding differs from the traditional curve, which typically follows a semilogarithmic linear relationship between the oil-water relative permeability ratio (K ro /K rw ) and the water saturation (S w ) value [10][11][12][13]. Numerous oilfield practices have indicated that the waterflooding characteristic curve tends to warp upward, even during the high water cut stage, suggesting that reservoirs possess significant production potential [7,[14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Unique Characteristics of High-Pore-Volume Waterflooding and Enhanced Oil Recovery Mechanisms in Offshore Sandstone Reservoirs Using Nuclear Magnetic Resonance Technology

Liu

et al. 2023

JMSE

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A single paragraph of about 200 words maximum. For research articles, abstracts should give a pertinent overview of the work. We strongly encourage authors to use the following style of structured abstracts, but without headings: (1) Background: Place the question addressed in a broad context and highlight the purpose of the study; (2) Methods: briefly describe the main methods or treatments applied; (3) Results: summarize the article’s main findings; (4) Conclusions: indicate the main conclusions or interpretations. The abstract should be an objective representation of the article and it must not contain results that are not presented and substantiated in the main text and should not exaggerate the main conclusions.

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Percolation transitions of spontaneous imbibition in fractional-wet porous media

Xiao

Zheng

et al. 2023

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Modeling of two-phase ﬂow in heterogeneous wet porous media

Cited by 5 publications

References 0 publications

Further Study on the Effect of Interfacial Tension on Cocurrent Spontaneous Imbibition Based on Direct Simulation and NMR

Further Study on the Effect of Interfacial Tension on Cocurrent Spontaneous Imbibition Based on Direct Simulation and NMR

Exploring the Unique Characteristics of High-Pore-Volume Waterflooding and Enhanced Oil Recovery Mechanisms in Offshore Sandstone Reservoirs Using Nuclear Magnetic Resonance Technology

Percolation transitions of spontaneous imbibition in fractional-wet porous media

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