Experiences in numerical simulation of wax deposition in oil and multiphase pipelines: Theory versus reality

Leporini, Mariella; Terenzi, Alessandro; Marchetti, Barbara; Giacchetta, Giancarlo; Corvaro, Francesco

doi:10.1016/j.petrol.2018.11.087

Cited by 31 publications

(22 citation statements)

References 18 publications

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“…However, its effect is generally considered minimal and it is generally neglected during modeling the overall deposition mechanisms [22]. Consequently, the latter three mechanisms are widely not accepted, especially for the computational modeling procedures [22][23][24][25][26][27][28]. In this part of the study, the most dominant mechanism, the molecular diffusion, is briefly reviewed.…”

Section: Mathematical Modelling Of Wax Depositionmentioning

confidence: 99%

“…However, most of the lab-scale experiments are based on the single-phase flow, which frequently yields deviated outcomes when compared to more-general multiphase flow cases. In addition, Leporini et al [25] emphasized that the modeling results are not always applicable for the field scale analysis and that the scale effect also needs to be taken into account for more reliable interpretation. Consequently, recent studies focus on more complex environments, such as wax deposition behavior under multi-phase flow and turbulent flow.…”

Section: Mathematical Modelling Of Wax Depositionmentioning

confidence: 99%

“…Flow assurance is defined as the process of ensuring the successful and economical flow of hydrocarbon stream transported from the reservoir to the point of sale. Maintaining the hydrocarbons flow during oil and gas production is a critical task, especially in deep-water or cold weather, due to long distances, high pressures and low temperatures [25,93]. Flow assurance is applied to the petroleum flow route during every stages of production.…”

Section: Effects Of Wax Deposition On the Flow Assurance Of Hydrocarbonmentioning

confidence: 99%

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Occurrence and Characterization of Paraffin Wax Formed in Developing Wells and Pipelines

et al. 2019

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Deposition and precipitation of paraffin wax in pipelines are major problems in the production, transfer, storage, and processing of crude oil. To prevent complete clogging, it is necessary to minimize and remove deposited wax in pipelines and tubing. Significant research has been done addressing the mechanisms of wax formation and its composition. In this review, the status of research and perspectives on the occurrence and characterization of the paraffin wax that forms in crude oil developing wells and pipelines has been critically reviewed. Several approaches for detecting paraffin wax and managing wax formation damage during oil recovery were discussed. This review also highlighted the effects of temperature and crude oil type on wax formation.

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Section: Mathematical Modelling Of Wax Depositionmentioning

confidence: 99%

Section: Mathematical Modelling Of Wax Depositionmentioning

confidence: 99%

Section: Effects Of Wax Deposition On the Flow Assurance Of Hydrocarbonmentioning

confidence: 99%

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Occurrence and Characterization of Paraffin Wax Formed in Developing Wells and Pipelines

et al. 2019

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“…A feasible way is also to combine mathematical models with a software program to simulate wax deposition in pipelines [25][26][27]. For example, the OLGA developed by Schlumberger implements three mathematical models for the simulation of wax deposition in pipelines: The RRR (Rygg, Rydahl, and Rønningsen) model, the Matzain model, and the "heat analogy" model.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the OLGA developed by Schlumberger implements three mathematical models for the simulation of wax deposition in pipelines: The RRR (Rygg, Rydahl, and Rønningsen) model, the Matzain model, and the "heat analogy" model. However, Leporini et al [25] found that wax deposition models still face significant uncertainties in the field application. The way to overcome this problem is to validate these models with an additional set of field data, but this can only be expected in the future.…”

Section: Introductionmentioning

confidence: 99%

Role of Shearing Dispersion and Stripping in Wax Deposition in Crude Oil Pipelines

Wang

Zhao

et al. 2019

Energies

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Wax deposition during crude oil transmission can cause a series of negative effects and lead to problems associated with pipeline safety. A considerable number of previous works have investigated the wax deposition mechanism, inhibition technology, and remediation methods. However, studies on the shearing mechanism of wax deposition have focused largely on the characterization of this phenomena. The role of the shearing mechanism on wax deposition has not been completely clarified. This mechanism can be divided into the shearing dispersion effect caused by radial migration of wax particles and the shearing stripping effect caused by hydrodynamic scouring. From the perspective of energy analysis, a novel wax deposition model was proposed that considered the flow parameters of waxy crude oil in pipelines instead of its rheological parameters. Considering the two effects of shearing dispersion and shearing stripping coexist, with either one of them being the dominant mechanism, a shearing dispersion flux model and a shearing stripping model were established. Furthermore, a quantitative method to distinguish between the roles of shearing dispersion and shearing stripping in wax deposition was developed. The results indicated that the shearing mechanism can contribute an average of approximately 10% and a maximum of nearly 30% to the wax deposition process. With an increase in the oil flow rate, the effect of the shearing mechanism on wax deposition is enhanced, and its contribution was demonstrated to be negative; shear stripping was observed to be the dominant mechanism. A critical flow rate was observed when the dominant effect changes. When the oil flow rate is lower than the critical flow rate, the shearing dispersion effect is the dominant effect; its contribution rate increases with an increase in the oil flow temperature. When the oil flow rate is higher than the critical flow rate, the shearing stripping effect is the dominant effect; its contribution rate increases with an increase in the oil flow temperature. This understanding can be used to design operational parameters of the actual crude oil pipelines and address the potential flow assurance problems. The results of this study are of great significance for understanding the wax deposition theory of crude oil and accelerating the development of petroleum industry pipelines.

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Phenomena, factors of wax deposition and its management strategies

et al. 2022

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Experiences in numerical simulation of wax deposition in oil and multiphase pipelines: Theory versus reality

Cited by 31 publications

References 18 publications

Occurrence and Characterization of Paraffin Wax Formed in Developing Wells and Pipelines

Occurrence and Characterization of Paraffin Wax Formed in Developing Wells and Pipelines

Role of Shearing Dispersion and Stripping in Wax Deposition in Crude Oil Pipelines

Phenomena, factors of wax deposition and its management strategies

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