Thermodynamic Analysis of Chalk–Brine–Oil Interactions

Eftekhari, Ali Akbar; Thomsen, Kaj; Stenby, Erling Halfdan; Nick, Hamidreza M.

doi:10.1021/acs.energyfuels.7b02019

Cited by 55 publications

(43 citation statements)

References 51 publications

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“…2)). Simple calculation gives 2.2 sites/cm 2 , which is close to the frequently used value of for surface complexation modeling (Eftekhari et al, 2017;Hiorth et al, 2010). Assuming calcite surface site density of 5 sites/nm 2 (5 · 10 14 sites/cm 2 ), we see that less than a half of the available surface sites were active, which is a reasonable number given considerable size of CTAC.…”

Section: Adsorption With Excess Of Negative Charge At Calcium Carbonasupporting

confidence: 80%

“…Additionally, they are active, i. e. are present in charged form (carboxylate), at typical reservoir pH (we assume here pH of 6 and above). Some researchers proposed that amines, aromatic amines, or R−COOCa + groups exist at crude oil brine interface in significant amounts (Hu et al, 2019;Eftekhari et al, 2017;Brady and Thyne, 2016).…”

Section: Adsorptionmentioning

confidence: 99%

“…The carboxylate would form from carboxylic at crude oil brine interface at high pH. This multicomponent ion-exchange mechanism was widely accepted in the literature, used, and discussed by several groups (Hu et al, 2019;Eftekhari et al, 2017;Srisuriyachai and Meekangwal, 2017;Yutkin et al, 2016;Lager et al, 2011). Yet, recent direct confirmation for silica does not provide strong evidence (Hu et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Adsorption of Charged Surfactants onto Calcium Carbonate

Hassan¹,

Kamireddy²,

Yutkin³

et al. 2019

IOR 2019 – 20th European Symposium on Improved Oil Recovery

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The fundamental study of adsorption in this manuscript pertains to a wellknown process of low salinity water flooding (LSW), which is a potentially economic way of incrementing productivity of oil reservoirs. Our preliminary results indicate adsorption of a positively charged surfactant CTAB (cetrimonium bromide) regardless of brine type and charge at the surface. We show that the surfactant behavior mimics that found at charged crude oil-brine interfaces. This result partially explains strong crude oil interaction with calcium carbonate and adds to the difficulties associated with oil extraction by LSW.

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Section: Adsorption With Excess Of Negative Charge At Calcium Carbonasupporting

confidence: 80%

Section: Adsorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Adsorption of Charged Surfactants onto Calcium Carbonate

Hassan¹,

Kamireddy²,

Yutkin³

et al. 2019

IOR 2019 – 20th European Symposium on Improved Oil Recovery

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“…As the surface charge is modified, the wetting condition is influenced towards improved water-wetness. Eftekhari et al [290] developed a SCM reactive transport model to derive the reaction equilibrium constant for natural carbonates by using a non-linear optimization technique to fit the model with ζ-potential and single-phase breakthrough curves data on intact chalk cores. The authors used the tuned model to suggest a correlation existing between the remaining oil in several imbibition tests on chalk and [>CaOH 2 + ⇔ − OOC<], which was estimated using equilibrium constants analogous to aqueous acid-base reactions.…”

Section: Carbonate Rocksmentioning

confidence: 99%

Brine-Dependent Recovery Processes in Carbonate and Sandstone Petroleum Reservoirs: Review of Laboratory-Field Studies, Interfacial Mechanisms and Modeling Attempts

2018

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Brine-dependent recovery, which involves injected water ionic composition and strength, has seen much global research efforts in the past two decades because of its benefits over other oil recovery methods. Several studies, ranging from lab coreflood experiments to field trials, indicate the potential of recovering additional oil in sandstone and carbonate reservoirs. Sandstone and carbonate rocks are composed of completely different minerals, with varying degree of complexity and heterogeneity, but wettability alteration has been widely considered as the consequence rather than the cause of brine-dependent recovery. However, the probable cause appears to be as a result of the combination of several proposed mechanisms that relate the wettability changes to the improved recovery. This paper provides a comprehensive review on laboratory and field observations, descriptions of underlying mechanisms and their validity, the complexity of the oil-brine-rock interactions, modeling works, and comparison between sandstone and carbonate rocks. The improvement in oil recovery varies depending on brine content (connate and injected), rock mineralogy, oil type and structure, and temperature. The brine ionic strength and composition modification are the two major frontlines that have been well-exploited, while further areas of investigation are highlighted to speed up the interpretation and prediction of the process efficiency.

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“…As the surface charge is modified, the wetting condition is influenced towards improved water-wetness. Eftekhari, et al [274] developed a SCM reactive transport model to derived reaction equilibrium constant for natural carbonates by using a non-linear optimization technique to fit the model with ζ-potential and single-phase breakthrough curves data on intact chalk cores. The authors used the tuned model to suggest a correlation existing between the remaining oil in several imbibition tests on chalk and [>CaOH2 + ↔ -OOC<], which was estimated using equilibrium constants analogous to aqueous acid-base reactions.…”

Section: Carbonate Rocksmentioning

confidence: 99%

 Brine-Dependent Recovery Processes (Smart-Water/Low-Salinity-Water) in Carbonate and Sandstone Petroleum Reservoirs: Review of Laboratory-Field Studies, Interfacial Mechanisms and Modeling Attempts

Awolayo¹,

Sarma²,

Nghiem³

2018

Preprint

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Brine-dependent recovery process has seen much global research efforts in the past two decades because of their benefits over other oil recovery methods. The process involves the tweaking of the ionic composition and strength of the injected water to improve oil production. In recent years, several studies ranging from laboratory coreflood experiments by many researchers to field trials by several companies admit to the potential of recovering additional oil in sandstone and carbonate reservoirs. Sandstone and carbonate rocks are composed of completely different minerals, with varying degree of complexity and heterogeneity, but wettability alteration has been widely considered as the consequence rather than the cause of brine-dependent recovery. However, there is no consensus on the cause as several mechanisms have been proposed to relate the wettability changes to the improved recovery. This review paper aims to provide a state-of-the-art development in published research and various efforts of the industry. This review outlines an overview of laboratory and field observations, descriptions of underlying mechanisms and their validity, the complexity of the oil-brine-rock interactions, modelling works, and comparison between sandstone and carbonate rocks. The provided information is intended to provide the reader with up-to-date information, point to relevant studies for those who are new and those implementing either laboratory- or field-scale projects to speed up the process of further investigations in this research area. Overall, the outcome of this review would potentially be of immense benefit to the oil industry.

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Thermodynamic Analysis of Chalk–Brine–Oil Interactions

Cited by 55 publications

References 51 publications

Adsorption of Charged Surfactants onto Calcium Carbonate

Adsorption of Charged Surfactants onto Calcium Carbonate

Brine-Dependent Recovery Processes in Carbonate and Sandstone Petroleum Reservoirs: Review of Laboratory-Field Studies, Interfacial Mechanisms and Modeling Attempts

Brine-Dependent Recovery Processes (Smart-Water/Low-Salinity-Water) in Carbonate and Sandstone Petroleum Reservoirs: Review of Laboratory-Field Studies, Interfacial Mechanisms and Modeling Attempts

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Thermodynamic Analysis of Chalk–Brine–Oil Interactions

Cited by 55 publications

References 51 publications

Adsorption of Charged Surfactants onto Calcium Carbonate

Adsorption of Charged Surfactants onto Calcium Carbonate

Brine-Dependent Recovery Processes in Carbonate and Sandstone Petroleum Reservoirs: Review of Laboratory-Field Studies, Interfacial Mechanisms and Modeling Attempts

&nbsp;Brine-Dependent Recovery Processes (Smart-Water/Low-Salinity-Water) in Carbonate and Sandstone Petroleum Reservoirs: Review of Laboratory-Field Studies, Interfacial Mechanisms and Modeling Attempts

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Product

Resources

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Brine-Dependent Recovery Processes (Smart-Water/Low-Salinity-Water) in Carbonate and Sandstone Petroleum Reservoirs: Review of Laboratory-Field Studies, Interfacial Mechanisms and Modeling Attempts