Mechanisms underlying the adhesion of crude oil to mineral surfaces: Relevance of oil-brine interactions

Klimenko, Alexandra; Molinier, Valérie; Bourrel, M.

doi:10.1016/j.petrol.2020.107036

Cited by 14 publications

(18 citation statements)

References 29 publications

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“…Some differences in pH and conductivity between Sw = 1 and Sor have been observed ( Table 4). These differences can be the result of further dissolution/precipitation phenomena during oil recovery but also indicates the transfer of endogenous oil species during oil-water contact [57]. As a result, the brines are not strictly identical at Sw = 1 and at Sor, which can compromise the direct comparison of zeta potentials.…”

Section: Zeta Potentialmentioning

confidence: 99%

Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Rodrigues

Levant

Klimenko

2022

Fuel

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Section: Zeta Potentialmentioning

confidence: 99%

Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Rodrigues

Levant

Klimenko

2022

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“…This underlines that aging the pore space with eqFW has a significant effect on the ability of water to displace oil. Previous studies (Klimenko et al 2020) also indicate that the endogenous crude oil species in equilibrated brines can apparently increase the oil-wetness of both quartz and calcite surfaces. Moreover, the magnitude of such effect depends strongly on oil nature and brine salinity.…”

Section: Waterflooding Experimentsmentioning

confidence: 80%

Optical measurements of oil release from calcite packed beds in microfluidic channels

Le-Anh

Rao

Ayirala

et al. 2020

Microfluid Nanofluid

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To enable the study of improved oil recovery (IOR) from carbonate rock via laboratory experiments at the pore scale, we have developed a novel microfluidic chip containing a 3D packed bed of calcite particles. The utilization of fluorescently labeled water phase enabled visualization up to 1-2 particle layers with confocal laser scanning microscopy. Porosity and residual oil saturation (ROS) in this space are quantified from image stacks in the depth direction (Z). To obtain reliable average ROS values, Z stacks are captured at various XY locations and sampled over several time-steps in the steady state. All image stacks are binarized using Otsu's method, subsequent to automated corrections for imperfect illumination and Z-drifts of the microscope stage. Low salinity IOR was mimicked using a packed bed that was initially saturated with water and then with mineral oil. Steady state ROS values showed no significant dependence on capillary number (Ca) in the range from 6 × 10-7 to 2 × 10-5. In contrast, chemical modification of the pore space via adsorption of water-extracted crude oil components yielded significantly higher ROS values, in agreement with a more oil-wet porous medium. These results indicate a good potential for using packed beds on a chip as an efficient screening tool for the optimization and development of different IOR methods.

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“…Several other challenges and shortcomings of the floatation method also need to be considered, such as the aging of rock sample, preference of fluid addition, and oil/brine-to-rock powder ratio, which may impact the wettability results . The type and concentration of acidic compounds in the crude play a major role in wettability characteristics. − Thus, using reservoir crude in the experiment is essential to draw a valid conclusion. − Others demonstrated the effect of temperature on wettability through floatation experiments and suggested that the static reservoir temperature should be considered for this study. As a way forward, we are testing HT–HP separating funnels with viewing windows to conduct high reservoir temperature samples.…”

Section: Discussionmentioning

confidence: 99%

Standardization of Particle Size for Floating Particle Wettability Measurement for Carbonate Rocks

et al. 2023

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Misrepresentation of the wettability of a reservoir can lead to potentially low ultimate hydrocarbon recovery resulting in substantial economic losses. At the same time, it is impossible to determine the wettability of a reservoir across its length and breadth on a continuous basis using standard procedures. This work presents the development and standardization of a quick, easy, and low-cost wettability measurement method using the adherence tendency of rock particles in the oil or aqueous phase. The most important aspect of this study was establishing the optimum particle size for sustained floatation and balancing the buoyancy and gravity effect. The results show that the particles sink with a larger than optimum particle size because of the gravity effect. Similarly, the particles would float if they are smaller than optimum due to buoyancy and viscosity advantages. A new scale is designed, and the midpoint analysis shows that a 63−90 μm particle size is the ideal size range for the carbonate reservoir's wettability measurements, as the midpoint of the size distribution coincides with the standard Amott−Harvey (A−H) index. However, this size range is found to be wider for oil-wet particles. The floating particle method has several advantages over the established methods once standardized against a reliable process. Not only is the process fast but it can be performed with basic laboratory tools and does not require a high skill set. Most importantly, reliable wettability information can be obtained from drill cuttings and core fragments, enabling the determination of reservoir wettability on a continuum basis and not as a point basis, thus providing a more reliable average value, particularly for heterogeneous and unconsolidated reservoirs.

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Mechanisms underlying the adhesion of crude oil to mineral surfaces: Relevance of oil-brine interactions

Cited by 14 publications

References 29 publications

Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Relevance of zeta potential as a tool for predicting the response of controlled salinity waterflooding in oil–water-carbonate systems

Optical measurements of oil release from calcite packed beds in microfluidic channels

Standardization of Particle Size for Floating Particle Wettability Measurement for Carbonate Rocks

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