Spontaneous Imbibition of Capillaries under the End Effect and Wetting Hysteresis

Zhang, Leilei; Wang, Keliang; An, Huiming; Li, Gen; Yu, Shanshan; Zhang, Wei; Yang, Xinyi

doi:10.1021/acsomega.1c06155

Cited by 5 publications

(3 citation statements)

References 40 publications

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“… 12 , 13 That scenario makes the surface of the liquid a convex meniscus so that the fluid in the tube forms a larger angle contact (θ > 90°). 13 Equation 5 for capillary pressure and its relationship to the surface tension in the pipe tube is as follows 14 – 16 :

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Section: Discussionmentioning

confidence: 99%

Flow Pressure Characteristics of the Ahmed Glaucoma Valve and Possible Effect of Entrapped Air in the Tube

Masdipa

Kaidzu

Tanito

2023

Trans. Vis. Sci. Tech.

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Purpose The purpose of this study was to assess the pressure characteristics of the Ahmed Glaucoma Valve (AGV) and possible effects of air trapped in the tube. Method Physiologic saline was pumped through 17 AGVs using a syringe infusion pump, and the flow pressure was measured by a set of pressure transducers. During the infusion at a rate of 2 µL/minute, the pressure measurement was repeated twice in each AGV to determine the repriming pressures with/without air (1 µL) in the tube. Results After a pressure surge occurred during the initial priming, the pressure decreased suddenly and then became constant. The repriming pressure, determined as the peak pressure before valve opening, was significantly ( P < 0.0001, paired t -test) higher with air (26.5 ± 6.8 mm Hg) than without air (12.1 ± 3.8 mm Hg), whereas the constant pressures after repriming was equivalent between with (10.6 ± 3.7 mm Hg) and without (10.4 ± 2.9 mm Hg) air conditions ( P = 0.68). Conclusions Air in the AGV tube causes increased repriming pressure of about two-fold compared to repriming without air. This pressure increment caused by air in the capillary-sized tube might occur because of the effects of viscosity pressure and capillary pressure. Translational Relevance To ensure stable surgical results , surgeons are advised to not allow air to remain in the tube. Pars plana tube insertion of the AGV combined with gas tamponade surgery may result in higher-than-expected intraocular pressure. Conversely, injection of air/gas can avoid postoperative hypotony when the AGV is implanted in eyes with a high risk of hypotony.

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…”

Section: Discussionmentioning

confidence: 99%

Flow Pressure Characteristics of the Ahmed Glaucoma Valve and Possible Effect of Entrapped Air in the Tube

Masdipa

Kaidzu

Tanito

2023

Trans. Vis. Sci. Tech.

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“…On this basis, there are two categories of imbibition: spontaneous/natural and forced. Spontaneous or natural imbibition is the process whereby a wetting fluid displaces a non-wetting fluid within a reservoir rock due to capillary pressure [70,72,76,77]; for instance, water displacing oil in an oil-saturated reservoir rock. On the other hand, forced imbibition are caused by viscous and gravity forces.…”

Section: Water Imbibitionmentioning

confidence: 99%

Production from Unconventional Petroleum Reservoirs: Précis of Stimulation Techniques and Fluid Systems

Eshiet¹

2022

Emerging Technologies in Hydraulic Fracturing and Gas Flow Modelling

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An overview of the different categories of unconventional oil and gas reservoirs, and corresponding stimulation techniques appropriate for them is examined. Three main groups of unconventional oil and gas formations are appraised: heavy oil, oil shale and tight reservoirs. The scope of stimulation methods applicable to heavy oil reservoirs is limited. This kind of formation contains characteristic high-viscous hydrocarbons and are produced majorly by cold production and thermal stimulation. On the other hand, a wider range of stimulation methods are successfully used to produce tight and oil shales formations. For oil shales, these include drilling horizontal wells as substitutes to vertical wells, hydraulic fracturing, surfactant treatment, water imbibition, thermal treatment and acidisation; whilst for tight formations, these include hydraulic fracturing, surfactant treatment, water imbibition, acidisation and the application of electro-kinetics. Fracturing fluid systems are integral to the implementation of most stimulation operations and are evaluated herein under the following groups: water-based, oil-based, foam-based and acid-based. The most commonly used fracturing fluids are water based, albeit there are several instances where other types of fluids or combination of fluids are more suitable based on factors such as formation sensitivity, costs, wettability, rock solubility, surface tension, capillarity, viscosity, density, rheology and reactivity.

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“…Following the commercial exploitation of marine tight oil in North America, tight oil has gained prominence as a focal point in unconventional global exploration and development [1][2][3][4][5]. However, due to the complex genesis and low porosity of reservoirs, the conventional production technology of tight reservoirs faces the challenges of low production of a single well, poor development efficiency, and large-scale application difficulty [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Investigating the Influencing Factors of Imbibition of Fracturing Fluids in Tight Reservoirs

Liu,

Qu,

Wang

et al. 2024

Processes

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Tight reservoirs are the focus of unconventional oil and gas resource development, but most tight reservoirs exhibit complex pore structures, strong non-homogeneity, and limited water drive development. Fracturing fluid imbibition is a critically important way to improve the recovery of tight reservoirs. In this paper, an NMR experimental device was used to conduct imbibition experiments in tight reservoirs, and the relationship between temperature, pressure, matrix permeability, and imbibition recovery was investigated. Based on the fracturing fluid imbibition recovery curve, the imbibition process is divided into the fast imbibition stage, slow imbibition stage, and imbibition equilibrium. In addition, based on the pore structure division, the recovery changes of each pore under different experimental conditions were quantitatively analyzed. The results indicate that the highest imbibition recovery is achieved at an experimental pressure of 5 MPa within the range of 0 MPa to 15 MPa. Increasing the experimental pressure can increase the imbibition rate but will not increase imbibition recovery. Within the investigated range in this paper, fracturing fluid imbibition increases with rising temperature and matrix permeability. Moreover, the recovery of each pore gradually increases with the experimental pressure ranging from 0 MPa to 5 MPa. The recovery of each pore is positively correlated with matrix permeability and temperature. During the experiment, micropores contributed the most to the recovery, while macropores contributed the least. The study in this paper guides the efficient development of tight reservoirs.

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Spontaneous Imbibition of Capillaries under the End Effect and Wetting Hysteresis

Cited by 5 publications

References 40 publications

Flow Pressure Characteristics of the Ahmed Glaucoma Valve and Possible Effect of Entrapped Air in the Tube

Flow Pressure Characteristics of the Ahmed Glaucoma Valve and Possible Effect of Entrapped Air in the Tube

Production from Unconventional Petroleum Reservoirs: Précis of Stimulation Techniques and Fluid Systems

Investigating the Influencing Factors of Imbibition of Fracturing Fluids in Tight Reservoirs

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