The Colloidal Structure of Crude Oil and the Structure of Oil Reservoirs

Mullins, Oliver C.; Betancourt, Soraya S.; Cribbs, Myrt Eugene; Dubost, Francois Xavier; Creek, Jefferson L.; Andrews, and A. Ballard; Venkataramanan, Lalitha

doi:10.1021/ef0700883

Cited by 189 publications

(256 citation statements)

References 47 publications

(122 reference statements)

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“…The molecular weights found here are consistent with those derived from mass spectrometric measurements. 24 This information was used to determine the molar concentration of the asphaltenes and resins in solution.…”

Section: Molecular Weight Of Resin and Asphaltene Nanoaggregatesmentioning

confidence: 99%

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A study of asphaltene-resin interactions

Marques¹,

Pereira²,

Bueno³

et al. 2012

J. Braz. Chem. Soc.

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Foi realizado um estudo para investigar a interação entre asfaltenos (em soluções de tolueno) e resinas (em soluções de n-heptano). Para entender melhor o tipo de interação entre essas frações, quantificou-se o consumo de resina quando asfaltenos (dissolvidos em tolueno) foram precipitados com uma solução de n-heptano contendo resina. Os resultados indicaram que a precipitação de asfaltenos ocorre juntamente com a redução na concentração de resina. Os perfis das isotermas de ligação indicaram que a saturação ocorreu em um caso, em quanto que o efeito cooperativo com posterior platô inicial foi observado para duas outras amostras. Estes resultados confirmaram a hipótese de que resinas podem adsorver em asfaltenos, mas não podem evitar floculação e precipitação de asfaltenos. Além disso, resultados de microcalorimetria sugeriram que a resina e asfalteno interagem por forças fracas de van der Waals. Estes resultados estão em contraste com a escola de pensamento predominante desde a década de 1940 que advoga que as resinas podem peptizar e estabilizar asfaltenos.A study was carried out to investigate the interaction between asphaltenes (in toluene solutions) and resins (in n-heptane solutions). To better understand the type of interaction between these fractions, it was quantified the resin uptake when asphaltenes (dissolved in toluene) were precipitated by a resin-containing n-heptane solution. These results indicated the asphaltene precipitation occurs together with a reduction in the resin concentration. The binding isotherm profiles indicated that saturation occurred in one case, while collective association following an initial plateau was observed for the other two samples. These results confirmed the hypothesis that resins can adsorb on asphaltenes but cannot prevent asphaltenes from flocculating and precipitating. Furthermore, microcalorimetric results suggested that the resin and asphaltene interact by weak van der Waals forces. These results are in stark contrast with the school of thought prevalent since the 1940s that resins can peptize and stabilize asphaltenes.

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Section: Molecular Weight Of Resin and Asphaltene Nanoaggregatesmentioning

confidence: 99%

“…10, 2012 has been questioned. 3 According to Wang and Buckley, 4 asphaltenes are not a specific family of chemicals with common functionally and varying molecular weight, like a homologous series. Their only unifying property is insolubility in a specified n-alkane.…”

Section: Introductionmentioning

confidence: 99%

A study of asphaltene-resin interactions

Marques¹,

Pereira²,

Bueno³

et al. 2012

J. Braz. Chem. Soc.

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“…Heavy oils are typically known for their high asphaltene content (> 5 wt.%), such asphaltenes [71,72] forms viscoelastic network of large size nanoaggregate clusters and promote formation damage as a result of self-association, and if sub-saturated oil reservoirs exist at pressures above the bubble point. The asphaltene becomes excluded from the oil matrix and then forms deposits on the reservoir rock.…”

Section: Asphaltene Growth Inhibitionmentioning

confidence: 99%

“…The SiO 2 A nanoparticles showed better adsorption capacity than others as the adsorption potential to capture n-C 7 asphaltenes is in the order of SiO 2 A > SiO 2 >A l 2 O 3 . The acidic silica exhibited better adsorptive capacity especially at low concentrations owing to increased surface acidity of the nanoparticles as n-C 7 asphaltenes adsorption increases concurrently with increase in surface acidity [70].Heavy oils are typically known for their high asphaltene content (> 5 wt.%), such asphaltenes [71,72] forms viscoelastic network of large size nanoaggregate clusters and promote formation damage as a result of self-association, and if sub-saturated oil reservoirs exist at pressures above the bubble point. The asphaltene becomes excluded from the oil matrix and then forms deposits on the reservoir rock.…”

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confidence: 99%

A Realistic Look at Nanostructured Material as an Innovative Approach for Enhanced Oil Recovery Process Upgrading

Nwidee¹,

Barifcani²,

Lebedev³

et al. 2018

Recent Insights in Petroleum Science and Engineering

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With the continuous rise in energy demand and decline in reserves, the Petroleum Industries are constantly in search of inventive and novel approaches to optimize hydrocarbon recovery despite several decades of deployment of conventional and enhanced strategies. This chapter presents an in-depth analysis of nanomaterial (nanoparticles), their unique characteristics and potentials in relation to smart field development, enhanced oil recovery (EOR) and CO 2 geosequestration. The particles surface functionalities, unique size dependent property, adsorption, and transport behavior were scrutinized. The materials precise role in enhancing reservoir parameters that influences rock-fluid interactions, and reservoir fluid distribution and displacement such as permeability, wettability, interfacial tension, and asphaltene aggregate growth inhibition were evaluated. The study argues that the application of nanoparticle based fluids as novel EOR approach offers more holistic measures, potentials, and opportunities than micro and macro particles and can stimulate the continuous evolution of EOR processes even under harsh reservoir conditions, thus, offering better benefits over conventional surface-active agents. We believe this study will significantly impact the understanding of EOR with respect to nanoparticles, which is crucial for augmenting reservoir processes and to accelerate the realization of nanoparticles for EOR and CO 2 sequestration processes at industrial scale.Keywords: EOR, nanoparticles, adsorption, Asphaltene, wettability, IFT, permeability, viscosity, CO 2 © 2018 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. OverviewIt is a fact that the period of cheap hydrocarbon recovery is waning as hydrocarbons are currently been explored in remote regions under harsh reservoir conditions. The accessible hydrocarbon resources are constantly declining with a corresponding increase in energy demand which invariably contributes to the price irregularities in the oil and gas industry. Globally, the growth in energy demand appears to be predominant amidst feasible unconventional energy options (renewable energy). Unarguably, newer energy sources, such as nuclear, wind, geo-thermal and solar are effective measures for addressing energy shortage. However, they are yet to be ample alternatives for substituting the role of oil in meeting the ever-rising energy demand. To date, these demands are currently being substantiated via hydrocarbon sources especially petroleum -oil is still the most valuable product with great global economic impact. Currently, diverse conventional strategies (waterflooding), and enhanced methods (use of chemicals, gases, and microbes) are been deployed in oil fields, regardless, these challenges persist. More efficient, yet cost-effective, environmenta...

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“…This model has been successfully applied to describe the viscosity response of crude oils (heavy, extra heavy, and de-asphalted oil) to the addition of asphaltenes at different temperatures (293-333 K). The authors consider asphaltenes as semisolid particles, and for this reason one expects the viscosity to increase the higher the asphaltene content [24,[34][35][36]. Similarly, multiple authors have modeled the viscosity of heavy crude as a function of asphaltene content with conventional models derived from Einstein's equation [24,26,29,30,37].…”

Section: Introductionmentioning

confidence: 99%

A New Model for Describing the Rheological Behavior of Heavy and Extra Heavy Crude Oils in the Presence of Nanoparticles

et al. 2017

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Abstract:The present work proposes for the first time a mathematical model for describing the rheological behavior of heavy and extra-heavy crude oils in the presence of nanoparticles. This model results from the combination of two existing mathematical models. The first one applies to the rheology of pseudoplastic substances, i.e., the Herschel-Bulkley model. The second one was previously developed by our research group to model the rheology of suspensions, namely the modified Pal and Rhodes model. The proposed model is applied to heavy and extra heavy crude oils in the presence of nanoparticles, considering the effects of nanoparticles concentration and surface chemical nature, temperature, and crude oil type. All the experimental data evaluated exhibited compelling goodness of fitting, and the physical parameters in the model follow correlate well with variations in viscosity. The new model is dependent of share rate and opens new possibilities for phenomenologically understanding viscosity reduction in heavy crude by adding solid nanoparticles and favoring the scale-up in enhanced oil recovery (EOR) and/or improved oil recovery (IOR) process.

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The Colloidal Structure of Crude Oil and the Structure of Oil Reservoirs

Cited by 189 publications

References 47 publications

A study of asphaltene-resin interactions

A study of asphaltene-resin interactions

A Realistic Look at Nanostructured Material as an Innovative Approach for Enhanced Oil Recovery Process Upgrading

A New Model for Describing the Rheological Behavior of Heavy and Extra Heavy Crude Oils in the Presence of Nanoparticles

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