Shahab Ayatollahi
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View article: Insights into the adsorption behavior of ions at the calcite/brine interface: Charge preferences and energetic analysis via DFT calculations
Insights into the adsorption behavior of ions at the calcite/brine interface: Charge preferences and energetic analysis via DFT calculations Open
A comprehensive investigation into the intricate dynamics at the interface of brines and calcite is imperative for effectively tackling challenges in enhanced oil recovery (EOR). Utilizing Density Functional Theory (DFT) calculations, we s…
Water/oil emulsion and asphaltene instability in different formations during low-salinity waterflooding: an experimental study Open
Low-salinity waterflooding is an important method in enhanced oil recovery. Previous studies have extensively investigated the effects of salinity on asphaltene behavior at the water-oil contact surface. However, the influence of rocks has…
View article: Experimental Core Flooding Investigation of New ZnO−γAl<sub>2</sub>O<sub>3</sub> Nanocomposites for Enhanced Oil Recovery in Carbonate Reservoirs
Experimental Core Flooding Investigation of New ZnO−γAl<sub>2</sub>O<sub>3</sub> Nanocomposites for Enhanced Oil Recovery in Carbonate Reservoirs Open
Generally, crude oil production in mature oil reservoirs is difficult. In this regard, some nanoparticles have been used to upgrade injected water into oil reservoirs. These nanoparticles can be used in a variety of injectable waters, incl…
Bacteria Cell Hydrophobicity and Interfacial Properties Relationships: A New MEOR Approach Open
For microbial enhanced oil recovery (MEOR), different mechanisms have been introduced. In some of these papers, the phenomena and mechanisms related to biosurfactants produced by certain microorganisms were discussed, while others studied …
View article: Asphaltene destabilization in the presence of an aqueous phase: The effects of salinity, ion type, and contact time
Asphaltene destabilization in the presence of an aqueous phase: The effects of salinity, ion type, and contact time Open
One of the possible fluid-fluid interactions during water-flooding in oil reservoirs, that is still debated, is the effect of injected brine salinity on asphaltene destabilization. If asphaltene precipitation is induced by salinity changes…
View article: Atomistic Insight into the Behavior of Ions at an Oil-Bearing Hydrated Calcite Surface: Implication to Ion-Engineered Waterflooding
Atomistic Insight into the Behavior of Ions at an Oil-Bearing Hydrated Calcite Surface: Implication to Ion-Engineered Waterflooding Open
This research provides an atomistic picture of the role of ions in modulating the microstructural features of an oil-contaminated calcite surface. This is of crucial importance for the rational design of ion-engineered waterflooding, a pro…
Atomistic insight into salinity dependent preferential binding of polar aromatics to calcite/brine interface: implications to low salinity waterflooding Open
This paper resolve the salinity-dependent interactions of polar components of crude oil at calcite-brine interface in atomic resolution. Molecular dynamics simulations carried out on the present study showed that ordered water monolayers d…
View article: A Deep Look into the Dynamics of Saltwater Imbibition in a Calcite Nanochannel: Temperature Impacts Capillarity Regimes
A Deep Look into the Dynamics of Saltwater Imbibition in a Calcite Nanochannel: Temperature Impacts Capillarity Regimes Open
This research concerns fundamentals of spontaneous transport of saltwater (1 mol·dm-3 NaCl solution) in nanopores of calcium carbonates. A fully atomistic model was adopted to scrutinize the temperature dependence of flow regimes during so…
View article: Ion-specific interactions at calcite–brine interfaces: a nano-scale study of the surface charge development and preferential binding of polar hydrocarbons
Ion-specific interactions at calcite–brine interfaces: a nano-scale study of the surface charge development and preferential binding of polar hydrocarbons Open
This research provides an atomic-level insight into the synergic contribution of mono- and divalent ions to interfacial environment of calcite surfaces exposed to electrolyte solutions containing organic compounds.
The role of CO2 and ion type in the dynamic interfacial tension of acidic crude oil/carbonated brine Open
The effects of CO2 and salt type on the interfacial tension (IFT) between crude oil and carbonated brine (CB) have not been fully understood. This study focuses on measuring the dynamic IFT between acidic crude oil with a total acid number…
Effect of water salinity on oil/brine interfacial behaviour during low salinity waterflooding: A mechanistic study Open
In recent years, controlling the salinity and composition of the injected water has become an emerging enhanced oil recovery (EOR) technique, often described as low salinity (LS) waterflooding. This work is done with the intention to contr…
Pore-scale investigation of selective plugging mechanism in immiscible two-phase flow using phase-field method Open
Biotechnology has had a major effect on improving crude oil displacement to increase petroleum production. The role of biopolymers and bio cells for selective plugging of production zones through biofilm formation has been defined. The abi…
Role of divalent ions, temperature, and crude oil during water injection into dolomitic carbonate oil reservoirs Open
Although wettability alteration has been shown to be the main control mechanism of Low Salinity and Smart Water (LS-SmW) injection, our understanding of the phenomena resulting in wettability changes still remains incomplete. In this study…
Dissociation of polar oil components in low salinity water and its impact on crude oil–brine interfacial interactions and physical properties Open
Despite many efforts into the study of fluids interaction in low salinity water flooding, they are not probing the basics of transport phenomena between the involved phases. This work is aimed to bring new understanding of fluid–fluid inte…
Viscous fingering and its effect on areal sweep efficiency during waterflooding: an experimental study Open
Viscous fingering is one of the main challenges that could reduce areal sweep efficiency during waterflooding in oil reservoirs. A series of waterflooding experiments were carried out in a Hele-Shaw cell at ambient temperature during which…