A conceptual modeling to predict asphaltene molecules fate within an annulus control volume

Shahsavani, Behnam; Ahmadi, Pouyan; Malayeri, M.R.; Riazi, Masoud; Safian, Gholam Abbas

doi:10.1016/j.molliq.2019.111414

Cited by 10 publications

(3 citation statements)

References 42 publications

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“…Many studies − have studied asphaltene precipitation remedies using various methods such as spectroscopy, , microscopy, , conductivity, filtration, and interfacial tension measurement. , To do so, different chemicals, including alcohols, organic acids, vegetable oils, and amphiphiles, were used as inhibitors. However, despite the recent advancement in this field of research, the oil industry still requires environmentally-friendly and cost-effective chemicals.…”

Section: Introductionmentioning

confidence: 99%

Hydrophobic Deep Eutectic Solvent and Glycolipid Biosurfactant as Green Asphaltene Inhibitors: Experimental and Theoretical Studies

Sanati

Malayeri

2021

Energy Fuels

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Precipitation of asphaltenes in porous media undesirably influences oil recovery due to pore clogging and subsequent wettability alteration. This study reports, primarily, the potential application of two environmentally-friendly chemicals, a hydrophobic deep eutectic solvent (DES) and a glycolipid biosurfactant known as rhamnolipid (RL), as asphaltene precipitation inhibitors. While DES was prepared by mixing glycerol, as its hydrogen bond donor (HBD) component, with methyltrioctylammonium chloride, as its hydrogen bond acceptor (HBA) component, RL was extracted from the native strain of Pseudomonas aeruginosa. The inhibition potential of these green chemicals was then characterized from experimental and theoretical perspectives. In the experimental part, the inhibition efficacy of both chemicals was initially confirmed based on the precipitation experiments. Next, filtration and optical microscopy provided evidence of chemical interaction between inhibitors and asphaltenes. To further illustrate the structural alteration of asphaltenes recovered from the inhibitor-included solutions, Fourier transform infrared and elemental analyses were conducted. Results revealed that the dominant inhibition mechanism of DES was the cracking/dissolution of asphaltene particles compared to peptization in the case of RL. Increased oxygen content and H/C ratio plus the decreased aromaticity index of the asphaltenes recovered from the DEScontaining solution compared with those of the raw asphaltene were indications of the dissolution mechanism. In addition, comparing the performance of synthesized chemicals with a conventional inhibitor, dodecylbenzene sulfonic acid, revealed the preferable performance of the chemicals. In the theoretical part, the propensity of asphaltene precipitation was studied using the surface energy concept based on the extended DLVO theory. The results showed that acid−base interactions among different subcomponents of the surface energy played a key role in retarding asphaltene precipitation by decreasing the attraction force between similar asphaltene particles, further supported by the concepts of work of cohesion and adhesion.

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Section: Introductionmentioning

confidence: 99%

Hydrophobic Deep Eutectic Solvent and Glycolipid Biosurfactant as Green Asphaltene Inhibitors: Experimental and Theoretical Studies

Sanati

Malayeri

2021

Energy Fuels

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“…Asphaltene may precipitate when the oil phase changes due to variation in the temperature, pressure or composition . Asphaltene can deposit in the reservoir, production tubing, wellhead equipment, transporting pipelines, and refinery facilities . Deposition of asphaltene in the reservoir causes pore space plugging, which reduces the permeability of the reservoir over time .…”

Section: Introductionmentioning

confidence: 99%

“…1 Asphaltene can deposit in the reservoir, production tubing, wellhead equipment, transporting pipelines, and refinery facilities. 2 Deposition of asphaltene in the reservoir causes pore space plugging, which reduces the permeability of the reservoir over time. 3 Since asphaltenes are composed of various compounds with a complex structure, determining their chemical identity is difficult.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Brine Effect on Asphaltene Precipitation and Deposition during Water Injection in Porous Media Using Static and Dynamic Systems

Alizadeh

Soulgani

2021

Energy Fuels

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Asphaltene precipitation and deposition in porous media damages formation by reducing permeability and altering wettability, resulting in a significant reduction in reservoir oil production. Although the effects of some factors such as temperature, pressure, and composition have been studied over time, the effects of others, such as emulsified brine, remain uncertain and the available data in this area is limited. Most importantly, the effect of brine injection on deposition has never been studied in previous research. In this study, a number of systematic experiments were designed and conducted to investigate the effect of the aqueous phase. Several variables, including the water content, salt type, and salt concentration were studied in both the static and dynamic systems, and the evidence of consistent changes in asphaltene precipitation and deposition has been obtained. The results revealed that when the water amount reaches 50 wt %, asphaltene precipitation increases close to 10 wt %. However, as the amount of water increased, the intensity of asphaltene precipitation decreased. Furthermore, various salts have shown different behaviors in the static system and dual effects have been observed with increasing concentration. The optimum concentration of different salts was found to be between 25 000 and 40 000 ppm, MgCl2 producing the most asphaltene precipitation and KCl producing the least. MgCl2 at a concentration of about 40 000 ppm resulted in the precipitation of 7.8 wt % asphaltene and while this was 6.4 wt % for KCl 25 000 ppm. Also, for these salt concentrations, the interfacial tension reached 20.5 and 22.5 mN/m, respectively. Although the presence of water in the flooding system reduced the permeability up to 60% by depositing the asphaltene, unlike the static test, the presence of salt had no significant effect on the permeability reduction.

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Analysis of wellbore clogging by asphaltene deposition using interaction energies

Nikoo

Ghaedi

Malayeri

et al. 2023

Fuel

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A conceptual modeling to predict asphaltene molecules fate within an annulus control volume

Cited by 10 publications

References 42 publications

Hydrophobic Deep Eutectic Solvent and Glycolipid Biosurfactant as Green Asphaltene Inhibitors: Experimental and Theoretical Studies

Hydrophobic Deep Eutectic Solvent and Glycolipid Biosurfactant as Green Asphaltene Inhibitors: Experimental and Theoretical Studies

Experimental Investigation of the Brine Effect on Asphaltene Precipitation and Deposition during Water Injection in Porous Media Using Static and Dynamic Systems

Analysis of wellbore clogging by asphaltene deposition using interaction energies

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