Impact of surface roughness on wettability of oil-brine-calcite system at sub-pore scale

Sari, Ahmad; Maskari, Nasser S. Al; Saeedi, Ali; Xie, Quan

doi:10.1016/j.molliq.2019.112107

Cited by 46 publications

(23 citation statements)

References 50 publications

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“…Given the chemical and topographical heterogeneity of our aged calcite surfaces discussed above, we anticipate considerable contact angle (CA) hysteresis. 65,86 In such cases, advancing (θ oil adv ) and receding (θ oil rec ) CAs rather than Young's angle are the only reliable measures of surface wettability. In all our experiments, strong pinning prevented any receding motion of the contact line and thus any measurement of a meaningful value of θ oil rec .…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Mineral Interfaces and Oil Recovery: A Microscopic View on Surface Reconstruction, Organic Modification, and Wettability Alteration of Carbonates

Rao¹,

Kumar²,

Annink³

et al. 2020

Energy Fuels

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While it is generally known that aging protocols have an important impact on the interaction between crude oil (CRO), brines, and mineral surfaces, the microscopic consequences of the various steps of aging have hardly been described. In this study, we characterize the properties of fluids and carbonate mineral surfaces throughout a series of equilibration steps at 95 °C and correlate these microscopic observations with macroscopic contact angle measurements. Chemical equilibration of CRO (eqCRO) and FW (eqFW) leads to transfer of organic molecules from the former to the latter, causing also a pH change in the eqFW. Confocal Raman microscopy, atomic force microscopy, and infrared spectroscopy are used to reveal how consecutive aging of calcite in eqFW and eqCRO induces: first, in eqFW, considerable surface reconstruction and precipitation of mineral particles with colocalized organic species, and second, upon exposure to eqCRO, the formation of a second adlayer primarily composed of polyaromatic hydrocarbon-rich particles. Our results show how these interconnected microscopic chemical and topographical surface modifications give rise to more "oil wetting" contact angles after the two-step aging procedure.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Mineral Interfaces and Oil Recovery: A Microscopic View on Surface Reconstruction, Organic Modification, and Wettability Alteration of Carbonates

Rao¹,

Kumar²,

Annink³

et al. 2020

Energy Fuels

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“…This technique neglects the role of surface roughness, which has been studied to influence carbonate rock. 45 , 46 In a work by Al Maskari et al, 45 it was observed that surface roughness (∼17 nm) caused by calcite dissolution did not greatly influence the wettability alteration trends caused by low salinity water on calcite substrates. Rather, Al Maskari et al 45 proposed that the electrostatic interactions at the nanoscale were strong and served as the driver for the observed changes in calcite wettability.…”

Section: Introductionmentioning

confidence: 99%

“…Rather, Al Maskari et al 45 proposed that the electrostatic interactions at the nanoscale were strong and served as the driver for the observed changes in calcite wettability. In further analysis aimed at increasing the surface roughness, Sari et al 46 observed that at higher roughness (∼945 nm), the wetting state of the calcite rock was affected. They observed that the changes in wettability due to surface roughness could not be predicted by the Wenzel contact angle model, indicating the importance of incorporating electrostatic interactions at different length scales for analysis.…”

Section: Introductionmentioning

confidence: 99%

Ionic Interactions at the Crude Oil–Brine–Rock Interfaces Using Different Surface Complexation Models and DLVO Theory: Application to Carbonate Wettability

2022

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The impact of ionic association with the carbonate surface and its influence toward carbonate wettability remains unclear and is an important topic of interest in the current literature. In this work, a triple layer model (TLM) approach was used to capture the electrokinetic interactions at both calcite–brine and oil–brine interfaces. The developed TLM was assembled against measured ζ-potential values from the literature, successfully capturing the trends and closely matching the ζ-potential magnitudes. The developed TLM was compared to a diffused layer model (DLM) presented in previous works, with the DLM showing a better match to the ζ-potential values for seawater brine solutions. The ζ-potential values predicted from both surface complexation models (SCMs) were used to calculate the total interaction energy (or potential) based on the Derjaguin, Landau, Verwey, and Overbeek (DLVO) theory. It was observed that low Mg 2+ and high SO 4 2– concentrations in modified composition brine (MCB) made the calcite–brine interface more negative. However, at the oil–brine interface, low Mg 2+ made the oil–brine interface more negative but high SO 4 2– concentrations slightly shifted the oil–brine ζ-potential toward negative. At the crude oil–brine–rock (COBR) interfaces, low Mg 2+ and high SO 4 2– concentrations in the MCB were observed to generate a greater repulsive interaction energy, which could trigger carbonate wettability alteration toward water wetness. The absolute sum of the ζ-potential at both interfaces was observed to be correlated to the total interaction potential at a 0.25 nm separating distance. Thus, an increase in the absolute sum of the ζ-potentials would generate a greater repulsive interaction potential and trigger wettability alteration. Therefore, these SCMs can be applied to design modified composition brine capable of triggering a repulsive interaction energy to alter carbonate wettability toward water wetness.

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“…Alnoush et al investigated the impact of surface roughness on the wettability of calcite and concluded that increasing the surface roughness increases water wetting [22]. Sari et al investigated the impact of calcite surface roughness on contact angle in high and low salinity brines [23]. Similar to Alnoush et al, they reported that contact angle decreases with increasing surface roughness in both high and low salinity brines, where the surface roughness impacted the contact angle in a subtler manner in the low salinity brine.…”

Section: Introductionmentioning

confidence: 91%

Experimental determination of wetting behavior under non-atmospheric conditions relevant to reservoirs: a practical guide

Samara

Jaeger

2022

SN Appl. Sci.

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The wetting behavior in subsurface reservoirs plays a crucial role in storage, migration and liberation of fluid phases that are especially relevant to the energy sector. Further, the three-phase contact angle is important for implementing safe and successful subsurface storage of hydrogen and carbon dioxide. For reliable statements on the in situ wetting, it is important to be aware of the decisive factors of influence in order to design and perform the respective experiments in an appropriate way. This paper discusses the most important effects that shall be considered when determining contact angles experimentally, like drop size, surface roughness, aging process, dynamic behavior, and the pH, giving some valuable guidance to guarantee significant results. A drop base diameter of no less than 5 mm is found to be appropriate to minimize the impact of gravity on the contact angle under reservoir conditions. It is further confirmed that surface roughness contributes to better water wetting when the contact angles are below 90°. The versatility of contact angle measurements is shown through the dual-drop dual-crystal method that can be applied to estimate the adhesion forces present at the rock-brine interface and that need to be overcome by the flooding liquid to effectively displace hydrocarbons from the pores.

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Impact of surface roughness on wettability of oil-brine-calcite system at sub-pore scale

Cited by 46 publications

References 50 publications

Mineral Interfaces and Oil Recovery: A Microscopic View on Surface Reconstruction, Organic Modification, and Wettability Alteration of Carbonates

Mineral Interfaces and Oil Recovery: A Microscopic View on Surface Reconstruction, Organic Modification, and Wettability Alteration of Carbonates

Ionic Interactions at the Crude Oil–Brine–Rock Interfaces Using Different Surface Complexation Models and DLVO Theory: Application to Carbonate Wettability

Experimental determination of wetting behavior under non-atmospheric conditions relevant to reservoirs: a practical guide

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