Some mechanisms of crude oil/brine/solid interactions

Buckley, Jill S.; Liu, Y.

doi:10.1016/s0920-4105(98)00015-1

Cited by 260 publications

(244 citation statements)

References 13 publications

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“…They are the fraction of crude oil mixtures that precipitates in large excesses of low-boiling liquid n-alkane (C 5 to C 7 ) (40:1, n-alkane:oil, vol/vol). When crude oil is held within porous reservoir rock or soil, petroleum asphaltenes become the organic fraction that is extractable in aromatic solvents, such as alkylbenzenes, tetralins (i.e., a benzene ring fused with a naphthenic ring) or naphthalenes (i.e., two benzene rings fused together), but that precipitates in large excesses of low-boiling liquid nalkane (C 5 to C 7 ) (Calemma et al 1995;Yan et al 1997;Buckley and Liu 1998).…”

Section: B Sorption Of Petroleum Compounds From the Liquid Phasementioning

confidence: 99%

Investigation into mechanisms leading to the development, spread and persistence of soil water repellency following contamination by crude oil

Roy¹,

McGill²

2000

Can. J. Soil. Sci.

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Investigation into mechanisms leading to the development, spread and persistence of soil water repellency following contamination by crude oil. Can. J. Soil Sci. 80: 595-606. We investigated mechanisms by which soil water repellency may develop, spread and persist at old crude oil spill sites. We tested if its development may be due to soil sorption of vapour-phase petroleum compounds, its spread due to mechanical dispersal and mixing, and its persistence due to association of causative agents with humin and soil mineral surfaces. Development. Readily wettable soils acquired water repellency following 60 d of storage in the presence of oil-contaminated subsoil material. Change in soil wettability was attributed to soil sorption of vapour-phase petroleum compounds emanating from the contaminated material. We cite literature reports indicating that liquid-phase petroleum compounds can also cause soil water repellency. To that effect, we report how we tested and finally rejected the hypothesis that sorption of petroleum asphaltenes might be the sole cause of soil water repellency. Spread. We describe how mixing one mass unit of water-repellent soil with two to four mass units of wettable adjacent soil is sufficient to impart severe water repellency to soil mixes from three sites. Persistence. The water-repellent condition found at old crude oil spill sites is highly resistant to natural weathering and nondestructive extraction procedures. We show here that it also resists exhaustive extraction with 0.1 M NaOH and conclude that causative agents of soil water repellency are at least not solely associated with humic and fulvic acid fractions. Nous avons cherché à déterminer 1) si l'imperméabilisation du sol à l'eau aux emplacements de déversement de pétrole brut serait due à la sorption par le sol des composés pétroliers en phase vapeur, 2) si son extension se fait par dispersion et par mélange mécanique et 3) si la persistance est due à l'association des agents causaux avec les humines et avec les surfaces des minéraux du sol. Formation -Des sols facilement mouillables devenaient imperméables à l'eau au bout de 60 j de stockage en présence de matière du soussol pollué par le pétrole. Ces changements étaient imputés à la sorption par le sol des composés pétroliers en phase vapeur émanant des matières contaminées. Nous citons des documents publiés selon lesquels les composés pétrochimiques en phase liquide sont également capables de causer l'imperméabilisation. À cet égard nous expliquons comment nous avons testé, et finalement rejeté, l'hypothèse voulant que la sorption des asphaltènes du pétrole seraient l'unique cause du phénomène. Extension -Nous montrons comment le mélange d'une unité massique de sol imperméabilisé avec 2 à 4 unités de sol jouxtant mouillable était suffisant pour imperméabiliser gravement les sols provenant de trois emplacements. Persistance -L'hydrophobicité observée aux emplacements d'anciens déversements de pétrole brut est très résistante aux mécanismes naturels d'altération sur place et aux t...

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Section: B Sorption Of Petroleum Compounds From the Liquid Phasementioning

confidence: 99%

Investigation into mechanisms leading to the development, spread and persistence of soil water repellency following contamination by crude oil

Roy¹,

McGill²

2000

Can. J. Soil. Sci.

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“…The common non-clay minerals used in adsorption studies are quartz, calcite, feldspar, limestone, and dolomoite. Dudasova et al 28 studied the adsorption of asphaltenes from five different petroleum sources onto different organic surfaces and observed Langmuir-type adsorption. They concluded that the adsorption depends more upon the solid surface than upon the origin of the asphaltenes and that the heteroatomic species in asphaltenes were important for surface adsorption.…”

Section: Introductionmentioning

confidence: 99%

“…According to Buckley,28 the driving force for asphaltene adsorption on inorganic solids in the absence of water is mainly through polar interactions between oil and a solid, which leads to surface precipitation of asphaltenes.…”

Section: Introductionmentioning

confidence: 99%

Understanding Mechanisms of Asphaltene Adsorption from Organic Solvent on Mica

et al. 2014

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The adsorption process of asphaltene onto molecularly smooth mica surfaces from toluene solutions of various concentrations (0.01 -1 wt%) was studied using a Surface Forces Apparatus (SFA). Adsorption of asphaltenes onto mica was found to be highly dependent on adsorption time and concentration of the solution. The adsorption of asphaltenes led to an attractive bridging force between the mica surfaces. The adsorption process was identified to be controlled by diffusion of asphaltenes from the bulk solution to the mica surface with a diffusion coefficient on the order of 10 -10 m 2 /s at room temperature, depending on asphaltene bulk concentration. This diffusion coefficient corresponds to a hydrodynamic molecular radius of approximately 0.5 nm, indicating that asphaltene diffuses to mica surfaces as individual molecules at very low concentration (e.g. 0.01 wt%). Atomic force microscopy (AFM) images of the adsorbed asphaltenes on mica support the results of the SFA force measurements. The results from the SFA force measurements provide an insight on the molecular interactions (e.g. steric interaction, bridging attraction as a function of distance) of asphaltenes in organic media and hence their roles in crude oil and bitumen production.

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“…The complexity comes from the variety of ion-related interactions in OBR systems, including electrical double layer (EDL) repulsion, [16][17][18] ion-binding, [19][20][21] and acid/base interaction. 19,20 EDL repulsion essentially comes from the osmotic pressure produced by EDL overlap between similarly charged oil and rock. Ion-binding is the connection by multivalent ions between similarly charged groups of oil and rock, while acid/base interaction is the Coulombic attraction between oppositely charged groups.…”

Section: Introductionmentioning

confidence: 99%

Molecular dynamics for ion-tuned wettability in oil/brine/rock systems

Tian

Wang

2017

AIP Advances

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The dependence of wettability on brine ionic composition in oil/brine/rock systems, which is denoted as ion-tuned wettability, has important applications in geoscience. Due to the involvement of non-continuum effects, molecular dynamics (MD) simulation is necessary to improve understanding of its mechanism. This work establishes a reliable molecular dynamics (MD) framework to study ion-tuned wettability. We prove that our model system can well represent the wettability of the real oil/brine/rock system, and that the wettability alteration from the MD results is qualitatively consistent with the EDL repulsion theory when ion-binding does not exist. In the process to establish the MD framework, our work suggests that adding counter ions to balance interface charges is good for studying concentration effect on wettability, and the contact angle defined from mass center coordinates is effective to measure the wettability of the nano-scale MD system. This work provides the basis for on-going studies using MD simulation to reveal the mechanism of ion-tuned wettability.

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Some mechanisms of crude oil/brine/solid interactions

Cited by 260 publications

References 13 publications

Investigation into mechanisms leading to the development, spread and persistence of soil water repellency following contamination by crude oil

Investigation into mechanisms leading to the development, spread and persistence of soil water repellency following contamination by crude oil

Understanding Mechanisms of Asphaltene Adsorption from Organic Solvent on Mica

Molecular dynamics for ion-tuned wettability in oil/brine/rock systems

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