Impact of Modified Seawater on Zeta Potential and Morphology of Calcite and Dolomite Aged with Stearic Acid

Al-Hashim, Hasan S.; Kasha, Ahmed; Abdallah, Wael; Sauerer, Bastian

doi:10.1021/acs.energyfuels.7b03753

Cited by 42 publications

(44 citation statements)

References 68 publications

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“…Additionally, different types of outcrop chalk cores are shown to have different degree of reactivity towards SO 2− 4 ions [118]. Dolomite surfaces are suggested to behave similar to calcite surfaces in wettability alteration toward LSW [30,31,62,119]. However, it was suggested that, adsorption of stearic acid molecules on dolomite surfaces is stronger than on calcite surfaces, due to the positive surface charge of dolomite in diluted seawater [31].…”

Section: Rock Mineralogymentioning

confidence: 99%

“…Dolomite surfaces are suggested to behave similar to calcite surfaces in wettability alteration toward LSW [30,31,62,119]. However, it was suggested that, adsorption of stearic acid molecules on dolomite surfaces is stronger than on calcite surfaces, due to the positive surface charge of dolomite in diluted seawater [31]. Consequently, diluted seawater is less efficient in altering the surface charge of dolomite and releasing adsorbed carboxylic acid materials when compared to calcite [31].…”

Section: Rock Mineralogymentioning

confidence: 99%

“…It was first shown that either altering the brine composition or reducing the salinity of injected brine below that of the initial formation water can lead to additional oil recovery for Berea sandstone [6][7][8][9][10][11][12]. Such results attracted many oil and gas companies, such as British Petroleum [13][14][15][16][17][18][19], Shell [20][21][22][23][24][25][26], ExxonMobil [27,28], Schlumberger [29][30][31], TOTAL [32,33], and Statoil [34,35] to investigate and further explore the potential and applicability of low salinity waterflooding (LSW) for improved oil recovery. LSW, also known as designer waterflood, advanced ion management, and smart waterflooding, injects brine with controlled ionic concentration and composition (also known as smart water or dynamic water) into the well [17,20,27].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Low Salinity Waterflooding in Carbonate Reservoirs: Review of Interfacial Mechanisms

Derkani

Fletcher

Abdallah

et al. 2018

Colloids and Interfaces

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153

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Carbonate rock reservoirs comprise approximately 60% of the world's oil and gas reserves. Complex flow mechanisms and strong adsorption of crude oil on carbonate formation surfaces can reduce hydrocarbon recovery of an oil-wet carbonate reservoir to as low as 10%. Low salinity waterflooding (LSW) has been confirmed as a promising technique to improve the oil recovery factor. However, the principal mechanism underpinning this recovery method is not fully understood, which poses a challenge toward designing the optimal salinity and ionic composition of any injection solution. In general, it is believed that there is more than one mechanism involved in LSW of carbonates; even though wettability alteration toward a more desirable state for oil to be recovered could be the main cause during LSW, how this alteration happens is still the subject of debate. This paper reviews different working conditions of LSW, previous studies, and field observations, alongside the proposed interfacial mechanisms which affect the colloidal interactions at oil-rock-brine interfaces. This paper provides a comprehensive review of studies on LSW in carbonate formation and further analyzes the latest achievements of LSW application in carbonates, which helps to better understand the challenges involved in these complicated multicomponent systems and potentially benefits the oil production industry.

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Section: Rock Mineralogymentioning

confidence: 99%

Section: Rock Mineralogymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low Salinity Waterflooding in Carbonate Reservoirs: Review of Interfacial Mechanisms

Derkani

Fletcher

Abdallah

et al. 2018

Colloids and Interfaces

Self Cite

153

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“…Stearic acid (Sa) has suitable phase transition temperature, higher phase transition enthalpy, and good thermal stability 16,17 . The modification of inorganic particles by Sa has also been reported 18–20 . Sa is made up of two parts: a hydrophobic tail and a hydrophilic head.…”

Section: Introductionmentioning

confidence: 99%

Surface analysis of stearic acid modification for improving thermal resistant of calcium phosphate coated iron oxide yellow pigments

Pan

Cao

et al. 2020

Surface & Interface Analysis

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In order to widen the application of iron oxide yellow pigments (α‐FeOOH) in high temperature industry, α‐FeOOH coated with calcium phosphate (α‐FeOOH/Ca) were modified with stearic acid (Sa) through dry process. Scanning electron microscope (SEM), transmission electron microscope (TEM), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FT‐IR), X‐ray photoelectron spectroscopy (XPS), and thermogravimetry (TG) were employed to characterize the effect of surface modification. The effects of Sa dosage on the thermal resistance of α‐FeOOH/Ca after modification were also discussed. The crystal structure of α‐FeOOH/Ca does not change after modification with Sa, but the ratio of length to diameter about α‐FeOOH/Ca is smaller. Sa can react with α‐FeOOH/Ca in the form of –COOCa and HPO42− based on FT‐IR and XPS analyses. TG‐DTG results suggest that calcium phosphate and Sa improve the thermal stability of α‐FeOOH. The value of color difference of modified α‐FeOOH/Ca first decrease and then increase with increasing of Sa dosage, which is studied by CIE ΔL, Δa, and Δb colorimetric analyses. The amount of Sa affects the thermal resistance and dispersion performance of α‐FeOOH/Ca simultaneously; also the relationship between thermal resistance and dispersion is inversely proportional. Experimental characterizations reveal that introduction of the phosphates and Sa not only prevents the loss of water on the surface of α‐FeOOH but improve its activation index and dispersibility in organic solvents.

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“…Additionally, Yousef et al [28,29] confirmed that surface charge alteration of calcite toward more negative values, in the presence of diluted seawater, results in greater interactions with water molecules, and rock wettability alteration. Similarly, zeta potentials of calcite and dolomite surfaces conditioned with stearic acid are studied using synthetic diluted seawater [30]. It was shown that the calcite surfaces maintained negative zeta potential in the presence of deionised water, and in all the tested brines, excluding diluted seawater with higher concentration of cations (Ca 2+ and Mg 2+ ), which resulted in a positive zeta potential.…”

Section: Introductionmentioning

confidence: 99%

Mechanisms of Surface Charge Modification of Carbonates in Aqueous Electrolyte Solutions

Derkani

Fletcher

Fedorov

et al. 2019

Colloids and Interfaces

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The influence of different types of salts (NaCl, CaCl 2 , MgCl 2 , NaHCO 3 , and Na 2 SO 4 ) on the surface characteristics of unconditioned calcite and dolomite particles, and conditioned with stearic acid, was investigated. This study used zeta potential measurements to gain fundamental understanding of physico-chemical mechanisms involved in surface charge modification of carbonate minerals in the presence of diluted salt solutions. By increasing the salt concentration of divalent cationic salt solution (CaCl 2 and MgCl 2 ), the zeta potential of calcite particles was altered, resulting in charge reversal from negative to positive, while dolomite particles maintained positive zeta potential. This is due to the adsorption of potential-determining cations (Ca 2 + and Mg 2 + ), and consequent changes in the structure of the diffuse layer, predominantly driven by coulombic interactions. On the other hand, chemical adsorption of potential-determining anions (HCO 3 - and SO 4 2 - ) maintained the negative zeta potential of carbonate surfaces and increased its magnitude up to 10 mM, before decreasing at higher salt concentrations. Physisorption of stearic acid molecules on the calcite and dolomite surfaces changed the zeta potential to more negative values in all solutions. It is argued that divalent cations (Ca 2 + and Mg 2 + ) would result in positive and neutral complexes with stearic acid molecules, which may result in strongly bound stearic acid films, whereas ions resulting in negative mineral surface charges (SO 4 2 - and HCO 3 - ) will cause stearic acid films to be loosely bound to the carbonate mineral surfaces. The suggested mechanism for surface charge modification of carbonates, in the presence of different ions, is changes in both distribution of ions in the diffuse layer and its structure as a result of ion adsorption to the crystal lattice by having a positive contribution to the disjoining pressures when changing electrolyte concentration. This work extends the current knowledge base for dynamic water injection design by determining the effect of salt concentration on surface electrostatics.

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Impact of Modified Seawater on Zeta Potential and Morphology of Calcite and Dolomite Aged with Stearic Acid

Cited by 42 publications

References 68 publications

Low Salinity Waterflooding in Carbonate Reservoirs: Review of Interfacial Mechanisms

Low Salinity Waterflooding in Carbonate Reservoirs: Review of Interfacial Mechanisms

Surface analysis of stearic acid modification for improving thermal resistant of calcium phosphate coated iron oxide yellow pigments

Mechanisms of Surface Charge Modification of Carbonates in Aqueous Electrolyte Solutions

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