Structural features of asphaltene and petroleum resin fractions

Petrova, L. M.; Abbakumova, N. A.; Foss, Ted R.; Романов, Г. В.

doi:10.1134/s0965544111040062

Cited by 33 publications

(10 citation statements)

References 5 publications

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“…2* and 3*, thereby indicating the existence of critical concentrations, above which structuring occurs in asphaltene-containing MPM (4.5 wt %) and this parameter changes after the introduction of resins (4.81 wt %). Thus, resins peptize the asphaltene associates, increasing this critical concentration in the model petroleum mixtures, as has been noted previously [6,9]. In the absence of asphaltenes, the resins themselves become structuring centers.…”

Section: Resultssupporting

confidence: 66%

“…All these factors have an effect on the viscosity-temperature properties of petroleum disperse systems (PDS), creating significant obstacles to their production, transportation, and conditioning. A wealth of research works have been devoted to these processes in recent years, which can be divided into four types: instrumental studies of structuring and structures of heavy oil components [1][2][3][4][5][6][7][8][9], investigation of the rheological and thixotropic properties [10][11][12], prediction of certain parameters of PDS on the basis of experimental data and empirical equations [13][14][15][16], and integrated mathematical modeling of all necessary design parameters of PDS flow (filtration) on the basis of instrumental analysis data [17,18]. These studies were conducted either on real objects, which do not make it possible to adequately correlate changes in the composition to the properties of PDS, or on model solutions of heteroatomic components in aromatic-base hydrocarbons, which do not adequately simulate the dispersing ability of petroleum distillate fractions.…”

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confidence: 99%

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Influence of resins and asphaltenes on the structural and rheological properties of petroleum disperse systems

et al. 2017

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Abstract⎯The structural and rheological properties of resin-free model petroleum mixtures (MPM) with an asphaltene content of 0 to 6 wt % and the same mixtures with added 3.85 wt % petroleum resins have been investigated. The composition of the mixtures simulates the amount of the main hydrocarbon-group components and distillate fractions in light paraffin-base oils ( = 747.7-789.1 kg/m 3 ). Temperature-dynamic viscosity relationships for cooling the MPM have been obtained, most of which displayed abnormalities in the temperature range of ~40-60°C. Calculations of the viscous-flow activation energy (E μ ) have shown that there are abrupt changes in E μ in this abnormality region, which are an indication of structuring processes. By means of Fourier-transform laser diffractomery of MPM solutions in kerosene, it has been found that the particle size of the petroleum mixtures is qualitatively related to the revealed abrupt changes in E μ . It has been shown that these abnormalities correspond to the formation of paraffin-asphaltene associates and their existence is determined by the critical concentration of resins and asphaltenes in the mixtures.

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Section: Resultssupporting

confidence: 66%

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confidence: 99%

Influence of resins and asphaltenes on the structural and rheological properties of petroleum disperse systems

et al. 2017

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“…Besides, Petrova et al 43 reported that low-molecular-weight asphaltenes have an intermediate constitution between resin and high-molecular-weight asphaltene. However, it is not known if the polarity of asphaltene is mainly due to the presence of heteroatomic compartments in their structure or determined by the entire structure, including the polycyclic aromatic core.…”

Section: Extraction Of Asphaltene and Resinmentioning

confidence: 99%

Effect of Salinity, Resin, and Asphaltene on the Surface Properties of Acidic Crude Oil/Smart Water/Rock System

2014

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It has been already well established that adjusting the salinity of displacing fluid critically affects the oil recovery efficiency during secondary and tertiary oil recovery processes. In this investigation, systematic experiments are designed and conducted to find the effects of both low and high salinity water on the surface properties of crude oil−brine/solid surfaces. In this respect, the effects of the major salts including NaCl, CaCl 2 , and MgCl 2 are tested in the concentration range of 0−45 000 ppm on fluid/solid and fluid/fluid interactions for a crude oil/water/rock system. Two main surface properties including contact angle and interfacial tension (IFT) are measured using a pendant drop apparatus. The obtained results demonstrate the critical effects of heavy oil components on the interfacial properties. High film stability in some cases resulted in small contact angle changes, mostly in the range of the strongly water wet condition, for different brine salinity.

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“…The presence of a wide band at 3400 cm –1 indicates the presence of the associated OH and/or NH groups. According to refs , , the bands at 1729 cm –1 can be attributed to stretching vibrations of the CO groups in normal aliphatic, aromatic, or α, β-unsaturated esters, the bands at 1630 cm –1 - to vibrations of the CO group in amides; absorption bands in the region of 1300–1010 cm –1 – to vibrations of C–O–C groups both of ether and ester of cyclic and acyclic structures. In the same time, according to Nakanishi, which studied the standard compounds, the bands between 1230 and 1030 cm –1 can be assigned to stretching vibrations of the C–N bond of tertiary aliphatic amines and those in the range 1360–1250 and 1280–1180 cm –1 to the aromatic C–N bond (i.e., C arom –N) and aliphatic C–N bond (i.e., C aliph –N) in aromatic amines, respectively.…”

Section: Resultsmentioning

confidence: 99%

Features of the Composition of Compounds Trapped in Asphaltenes of Oils and Bitumens of the Bavly Oil Field

et al. 2021

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The asphaltene aggregates are made of a well-packed and stable in benzene (toluene) solution core and a loose-packed periphery, which can respectively occlude and adsorb the other oil fractions. Previously ( Liao Liao Energy Fuels2005180), it was proposed that the “occluded compounds have been well-protected from the secondary alteration processes that occurred in the oil reservoir and could be considered to be the original oil, whereas the adsorbed compounds have been affected by the secondary evolving processes”. In this paper, the compounds adsorbed and occluded in asphaltenes both of crude oils of the multipay Bavly oil field (Russia) and bitumens extracted from the source bed (Domanic formation) of the same oil field are studied and compared. It is found that the content of adsorbed compounds can reach up to 20% and higher and is dominated by resin components (mostly the polar resins). A comparative analysis of the structural-group and hydrocarbon compositions of oils, bitumens, and compounds adsorbed on the asphaltenes is carried out. It is found that the compounds adsorbed on oil asphaltenes are enriched with fragments of ethers, esters, and amides of acids and the high-molecular-weight n-alkanes in comparison with oil maltenes, while the composition of compounds adsorbed on bitumen asphaltenes is similar to that of bitumen maltenes. In the compounds occluded in oil asphaltenes, the homological series of normal and monomethyl substituted alkanes, which are considered to be relict hydrocarbons, are detected, while in compounds occluded in bitumen asphaltenes, the trace of high-molecular-weight n-alkanes and monomethyl substituted alkanes only. The obtained data indicate that compounds adsorbed on asphaltenes, like occluded compounds, can also characterize the composition of the original oil (protopetroleum) and that there may be a correlation between the oil and the bitumen of the Bavly oil field.

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Structural features of asphaltene and petroleum resin fractions

Cited by 33 publications

References 5 publications

Influence of resins and asphaltenes on the structural and rheological properties of petroleum disperse systems

Influence of resins and asphaltenes on the structural and rheological properties of petroleum disperse systems

Effect of Salinity, Resin, and Asphaltene on the Surface Properties of Acidic Crude Oil/Smart Water/Rock System

Features of the Composition of Compounds Trapped in Asphaltenes of Oils and Bitumens of the Bavly Oil Field

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