Calculating Deposit Formation in the Pipelining of Waxy Crude Oils

Correra, S.; Fasano, Antonio; Fusi, Lorenzo; Merino‐Garcia, Daniel

doi:10.1007/s11012-006-9028-4

Cited by 24 publications

(25 citation statements)

References 15 publications

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“…In [9] a model for this phenomenon has been proposed, assuming the normal condition of turbulent flow regime. The only driving mechanism for deposition was supposed to be Fickian diffusion and other concurrent phenomena such as deposit ablation, desaturation, ageing and the possible desaturation of the fluid have been taken into account.…”

Section: Turbulent Flow In Pipelines Crossing Cold Regionsmentioning

confidence: 99%

“…where Q is the imposed volumetric flow rate, ∆P is the pressure gradient and η is the viscosity of the fluid (see section 3 of [9] for a full explanation of (5.1)). The temperature profile in the thermal boundary layer is obtained assuming that the heat leaving from the bulk is equal to the one leaving from the wall and that deposition does not alter the thermal properties of the fluid.…”

Section: Turbulent Flow In Pipelines Crossing Cold Regionsmentioning

confidence: 99%

“…The reference paper is [9]. Finally, in Section 6., we will summarize the highly complex problem of gel formation, accompanied by the formation of a solid wax deposit, during the cooling of a static saturated solution [19].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Survey on Mathematical Modelling of Deposition in Waxy Crude Oils

Fasano

Fusi

Correra

et al. 2011

Math. Model. Nat. Phenom.

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Abstract. Waxy Crude Oils (WCO's) are characterized by the presence of heavy paraffins in sufficiently large concentrations. They exhibit quite complex thermodynamical and rheological behaviour and present the peculiar property of giving rise to the formation of segregated wax deposits, when temperature falls down the so called WAT, or Wax Appearance Temperature. In extreme cases, segregated waxes may lead to pipeline occlusion due to deposition on cold walls. In this paper we review the mathematical models formulated to describe: (i) wax cystallization or thawing in cooling/heating cycles; (ii) the mechanisms of mass transport in saturated non-isothermal solutions; (iii) the experimental device used to measure wax solubility and wax diffusivity; (iv) wax deposition in pipelines carrying a warm, wax-saturated WCO through cold regions; (v) wax deposition accompanied by gelification during the cooling of a WCO under a thermal gradient.

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Section: Turbulent Flow In Pipelines Crossing Cold Regionsmentioning

confidence: 99%

Section: Turbulent Flow In Pipelines Crossing Cold Regionsmentioning

confidence: 99%

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A Survey on Mathematical Modelling of Deposition in Waxy Crude Oils

Fasano

Fusi

Correra

et al. 2011

Math. Model. Nat. Phenom.

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“…The thermal profile will not change since the change of enthalpy occurring during segregation/dissolution with respect to the heat flux determined by the two thermostats is negligible (see [3]). We denote by r the radial coordinate and by R i and R e the radius of the cold finger and of the outer wall.…”

Section: Description Of the Apparatusmentioning

confidence: 99%

“…This has to be predicted with some accuracy for planning periodic removal of the deposit. This delicate question has been considered in the recent paper [3] for the case of turbulent flux. We refer to it also for some bibliographical references.…”

Section: Introductionmentioning

confidence: 99%

Wax diffusivity under given thermal gradient: a mathematical model

Correra

Fasano

Fusi³

et al. 2006

Z Angew Math Mech

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In this paper we describe how to obtain wax diffusivity and solubility in a saturated crude oil using the measurements of solid wax deposit in the experimental apparatus known as cold finger. Assuming that migration of dissolved wax is primarily driven by thermal gradients, mathematical models are derived relating the deposit growth rate to the above mentioned quantities. We will investigate the case in which the oil is not agitated. The stirred case is studied in part II. Comparisons with available experimental data are performed and possible sources of errors are discussed.

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Modelisation du depot de paraffine lors d'un ecoulement ascendant de petrole

Boucetta

Kessal

2010

Can J Chem Eng

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A study on the upslope flow of heated petroleum paraffin was conducted based on motion equations and heat transfer, which were rewritten in a completely dimensionless form to analyze the influence of temperature on the position of the deposit point and its change over time. A numerical resolution of the new equation system, based on the Runge-Kutta 4th order method, was performed for two current practical cases to avoid the line obstruction problem.Uneétude sur l'écoulement ascendant de pétrole, chauffé et chargé en paraffine, est menée sur la base deséquations du mouvement et du transfert de chaleur. Ces dernières sont réécrites sous une forme adimensionnelle complète, afin d'analyser l'influence de la température sur la position du point de déposition et sonévolution en fonction du temps. Une résolution numérique du nouveau système d'équations, basée sur la méthode de Runge-Kutta d'ordre quatre, est réalisée pour deux cas pratiques courants afin de prévenir le problème d'obstruction des conduites.

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Calculating Deposit Formation in the Pipelining of Waxy Crude Oils

Cited by 24 publications

References 15 publications

A Survey on Mathematical Modelling of Deposition in Waxy Crude Oils

A Survey on Mathematical Modelling of Deposition in Waxy Crude Oils

Wax diffusivity under given thermal gradient: a mathematical model

Modelisation du depot de paraffine lors d'un ecoulement ascendant de petrole

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