Electrokinetics at calcite-rich limestone surface: Understanding the role of ions in modified salinity waterflooding

Tetteh, Joel T.; Alimoradi, Sirwan; Brady, Patrick V.; Ghahfarokhi, Reza Barati

doi:10.1016/j.molliq.2019.111868

Cited by 39 publications

(95 citation statements)

References 69 publications

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“… 5 , 14 , 56 Rock surfaces can behave as colloidal surface dispersed in aqueous brine solutions. 11 The PHREEQC simulator developed by the USGS has been widely used to simulate surface complexations for rock minerals. 56 , 57 In recent years, SCM has been used to describe the electrostatic interaction between brine ions and the carbonate rock surface.…”

Section: Predicting Ionic Adsorption On Calcite Surfaces Using Dlm-ba...mentioning

confidence: 99%

“…56 , 57 In recent years, SCM has been used to describe the electrostatic interaction between brine ions and the carbonate rock surface. 11 , 12 , 14 , 15 , 21 − 23 , 26 , 38 , 39 , 58 − 64 Brady et al 58 developed an SCM to describe the calcite surface and investigate the potential changes in wettability caused by different brine compositions. They modeled the calcite surfaces as >CaOH and >CO 3 H hydration sites, which protonate or deprotonate to form positive and negative reactive species.…”

Section: Predicting Ionic Adsorption On Calcite Surfaces Using Dlm-ba...mentioning

confidence: 99%

“…However, the calcite site density of 4.95 sites/nm 2 is most commonly used in predicting electrokinetic properties of calcite surfaces. 11 , 21 , 26 , 27 , 31 , 34 , 63 , 66 , 67 Thus, it would be appropriate to determine the active site density of calcite surfaces through experimental approaches to correctly match the model prediction.…”

Section: Predicting Ionic Adsorption On Calcite Surfaces Using Dlm-ba...mentioning

confidence: 99%

“…The wettability alteration mechanisms associated with carbonate rocks are multivalent ionic exchange, expansion of the electrical double layer (EDL), electrostatic bond interactions, surface charge alteration, and calcite dissolution. 11 − 15 These mechanisms require the understanding of the electrostatic interaction at the rock surface caused by brine salinity and composition. The concept of potential determining ions (PDIs) influencing the wettability alteration process had been extensively investigated by Austad and co-workers in various publications for chalk formations.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Predicting Ionic Adsorption On Calcite Surfaces Using Dlm-ba...mentioning

confidence: 99%

Section: Predicting Ionic Adsorption On Calcite Surfaces Using Dlm-ba...mentioning

confidence: 99%

Section: Predicting Ionic Adsorption On Calcite Surfaces Using Dlm-ba...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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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“…In this study, AFM was used to conduct a nanoscopic investigation of low salinity (5000 ppm) water flooding (LSWF) and nanofluid EOR by measuring adhesion force and work of adhesion using muscovite mica as the substrate and a tip coated with selected functional groups. Both EOR techniques have received significant attention from academic research and industry in the past decade [27][28][29][30][31][32][33]. Underlying mechanisms of LSWF which have been identified are wettability alteration, multi-ion exchange, electrostatic repulsion, polar component desorption [30,34] while that of nanofluid EOR include: disjoining pressure, Brownian motion, interfacial tension (IFT) reduction and wettability alteration [29,35].…”

Section: Introductionmentioning

confidence: 99%

Insights into Nanoscale Wettability Effects of Low Salinity and Nanofluid Enhanced Oil Recovery Techniques

2020

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In this study, enhanced oil recovery (EOR) techniques—namely low salinity and nanofluid EOR—are probed at the nanometer-scale using an atomic force microscope (AFM). Mica substrates were used as model clay-rich rocks while AFM tips were coated to present alkyl (-CH3), aromatic (-C6H5) and carboxylic acid (-COOH) functional groups, to simulate oil media. We prepared brine formulations to test brine dilution and cation bridging effects while selected concentrations (0 to 1 wt%) of hydrophilic SiO2 nanoparticles dispersed in 1 wt% NaCl were used as nanofluids. Samples were immersed in fluid cells and chemical force mapping was used to measure the adhesion force between polar/non-polar moieties to substrates. Adhesion work was evaluated based on force-displacement curves and compared with theories. Results from AFM studies indicate that low salinity waters and nanoparticle dispersions promote nanoscale wettability alteration by significantly reducing three-phase adhesion force and the reversible thermodynamic work of adhesion, also known as adhesion energy. The maximum reduction in adhesion energy obtained in experiments was in excellent agreement with existing theories. Electrostatic repulsion and reduced non-electrostatic adhesion are prominent surface forces common to both low salinity and nanofluid EOR. Structural forces are complex in nature and may not always decrease total adhesion force and energy at high nanoparticle concentration. Wettability effects also depend on surface chemical groups and the presence of divalent Mg2+ and Ca2+ cations. This study provides fresh insights and fundamental information about low salinity and nanofluid EOR while demonstrating the application of force-distance spectroscopy in investigating EOR techniques.

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Review of low salinity waterflooding in carbonate rocks: mechanisms, investigation techniques, and future directions

Tetteh

Brady

Ghahfarokhi

2020

Advances in Colloid and Interface Science

107

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Electrokinetics at calcite-rich limestone surface: Understanding the role of ions in modified salinity waterflooding

Cited by 39 publications

References 69 publications

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

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

Insights into Nanoscale Wettability Effects of Low Salinity and Nanofluid Enhanced Oil Recovery Techniques

Review of low salinity waterflooding in carbonate rocks: mechanisms, investigation techniques, and future directions

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