The adsorption of polar components onto carbonate surfaces and the effect on wetting

Hopkins, Paul; Strand, Skule; Puntervold, Tina; Austad, Tor; Dizaj, S.R.; Waldeland, Jahn Otto; Simonsen, Jan

doi:10.1016/j.petrol.2016.08.028

Cited by 22 publications

(31 citation statements)

References 9 publications

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“…Although not specifically relating to precursor films of the type described herein, there are in that such chemistry has been implicated in wettability alteration in previous work, including reservoirs [57,58] and production pipelines [56]. The specific finding that fatty (naphthenic)…”

Section: Discussionmentioning

confidence: 82%

Physical and chemical aspects of “precursor films” spreading on water from natural bitumen

Gonzalez

Taylor

2018

Journal of Petroleum Science and Engineering

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Section: Discussionmentioning

confidence: 82%

Physical and chemical aspects of “precursor films” spreading on water from natural bitumen

Gonzalez

Taylor

2018

Journal of Petroleum Science and Engineering

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“…It was also reported that adsorption was a rather fast process in carbonates [28], which is apparently dominated by acidic components over basic components [27], [39]. The amount of crude oil injected had a significant effect on wettability, with greater crude oil exposure being correlated to lower water-wetness [38].…”

Section: Carbonates Wettabilitymentioning

confidence: 96%

“…The literature has shown that POC can effectively adsorb onto minerals, thereby altering their surface wettability [8,18,19,[22][23][24][25][26][27][28][29][30]. Solid evidence has shown that the AN is a major wetting parameter in carbonates [9], [31], [32] and that BN appears to have a higher impact on sandstone surfaces [33].…”

Section: Acidic Materialsmentioning

confidence: 99%

“…Other researchers have highlighted the influence of acidic polar components in relation with carbonates' wettability [27]- [29], [32], [38]. It has been generally agreed that in carbonate reservoirs, negatively charged carboxylates have a higher affinity towards positively charged calcium carbonate surfaces as compared with non-charged basic polar components, Equations 1-2.…”

Section: Carbonates Wettabilitymentioning

confidence: 99%

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The role of polar organic components in dynamic crude oil adsorption on sandstones and carbonates

Torrijos¹,

Mamonov²,

Strand³

et al. 2020

CT&F Cienc. Tecnol. Futuro

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An appropriated wettability characterization is crucial for the successful implementation of waterflooding operations. Understanding how crude oil adsorption takes place on different mineral surfaces and how these processes impact reservoir wettability are essential aspects that can help unlock and produce large underground oil reserves. Polar organic components (POC) present in crude oil are surface-active molecules with high affinity towards mineral surfaces. POCs are quantified by the acid and base numbers (AN and BN) with units of mgKOH/g. The POC adsorption behavior is highly influenced by the type of minerals and brines present in the reservoir system. This study aims to shed light onto the most important features of oil adsorption on carbonates and sandstones mineral surfaces; particular attention is given to the role of acidic components. Therefore, outcrop sandstone and carbonate materials were used. The sandstone material contains various silicates, including quartz, Illite clay, and feldspars. The carbonate outcrop material came from the Stevns Klint quarry in Denmark and is considered a very pure calcium carbonate with minimum silicate impurities. Dynamic adsorption tests were performed at 50°C by injecting low asphaltene crude oils into core plugs, and AN and BN values of the effluent oil samples were measured and compared with the influent oil values. Furthermore, spontaneous imbibition (SI) tests were performed to assess the wettability impact of crude oil injection in oil flooded cores. The results showed that after crude oil injection, the cores became mix-wet. Confirmation of a reduction in capillary forces and a shift towards a less water-wet state was reported for both mineralogies, i.e., sandstones and carbonates. The acidic polar components had a substantial impact on carbonates wettability, while on sandstones, the experiments suggested that acidic polar components had a lower impact on wettability than that observed in the basic polar components.

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“…авторы связывают это с тем, что карбок сильные группы и длинные цепи жирных кислот способны образовывать плотно упакованные уг леводородные слои разной толщины на поверх ности карбонатов. В результате, смачиваемость поверхности меняется с изначально гидрофиль ной на гидрофобную [Hopkins, 2016].…”

Section: причины изменения смачиваемостиunclassified

Experimental methods for studying the wetting properties of oil reservoirs: a review

2019

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The theoretical principles of the laboratory methods for studying the wettability of unconventional oil formation rocks are discussed and examples of their practical implementation are presented. The comparative analysis of the advantages and disadvantages of each method is presented. It is shown that despite the recent progress in the development of methods for determining the wettability of rocks, they still need to be improved. Examples of their possible improvements are discussed.

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The adsorption of polar components onto carbonate surfaces and the effect on wetting

Cited by 22 publications

References 9 publications

Physical and chemical aspects of “precursor films” spreading on water from natural bitumen

Physical and chemical aspects of “precursor films” spreading on water from natural bitumen

The role of polar organic components in dynamic crude oil adsorption on sandstones and carbonates

Experimental methods for studying the wetting properties of oil reservoirs: a review

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