Wax Deposition in Crude Oil Pipelines

Bern, P.A.; Withers, V.R.; Cairns, Roger J.R.

doi:10.2118/206-1980-ms

Cited by 113 publications

(74 citation statements)

References 2 publications

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“…This process can be explained by three mechanisms: molecular diffusion, shear rate, and Brownian diffusion (Bern et al, 1980;Misra et al, 1995). Molecular diffusion of wax molecules starts when the pіpewall temperature reaches WAT and wax is precipitated, resulting in a concentration gradient between the dissolved wax in the turbulent core and the wax remaining in solution at the pіpewall.…”

Section: Wax Depositionmentioning

confidence: 99%

The Review of Flow Assurance Solutions With Respect to Wax and Asphaltene

Bimuratkyzy

Sagindykov

2016

BJPG

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This study examines mechanisms of wax and asphaltene precipitation and deposition, effects of the depositions on oil reservoir characteristics and performance, deposіtion prediction methods, deposition mitigation and removal techniques. Estimation results of several thermodynamic models of wax appearance temperature and subsequent deposition agree wіth each other. These estimations along with the limited field data comparisons suggest moderate success in modelling wax deposition, maіnly because wax deposits depend on temperature. Asphaltenes' nature is unclear. Its mechanisms of precipitation, flocculation, and deposition remain unclear. So, the reliability of any forecast and simulation models can be questionable. Although there is a lack of documented evіdence of any reliable method for predicting asphaltene deposіtion with high confidence, probably due to unrepresentative crude oil samples, there is reasonably good chemicals performance. These chemicals show that, if the deposition prevention is impossible, at least it can be controlled and managed. The lessons learned from different development projects and the best practices were used to define the flow assurance mitigation strategies. Since this study contains the necessary information on wax and asphaltene deposition, it can be used as a reference for further exploration of this field.

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Section: Wax Depositionmentioning

confidence: 99%

The Review of Flow Assurance Solutions With Respect to Wax and Asphaltene

Bimuratkyzy

Sagindykov

2016

BJPG

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“…There exists a huge literature on this subject (see e.g. [5], [7], [20], [29], [38], [41], [45], [56], [60]) aimed at interpreting the results on experimental loops and field experiments.…”

Section: Deposition In Moving Mixturesmentioning

confidence: 99%

Wax Segregation in Oils: A Multiscale Problem

Primicerio

2010

Progress in Industrial Mathematics at ECMI 2008

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“…The oil temperature and wall temperature of the reference section are consistent, so there is no wax deposition on the reference section. And the test section must ensure that there is a temperature difference between oil and the tube wall, the wall temperature of the test section is lower than the oil temperature in the test section, so that the test section will appear wax deposition (Lashkarbolooki M., 2011;Liu et al, 2012;Ramirez-Jaramillo et al, 2004;Azevedo et al, 2003;Bern et al, 1980;Tian et al, 2014;Singh et al, 1999;Jennings et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

The Study on Calculation Method of Temperature Distribution of Tested Tube for Wax Deposition Experimental Loop

Rong-ge¹,

Jin²,

Tian³

et al. 2018

Frontiers in Heat and Mass Transfer

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The loop experiment device plays an important role in the study of wax deposition, and the calculation of the temperature distribution of the test section is the key to establish the wax deposition model. In the conditions of the wax deposition was not formed and constant wall temperature of the tube, the energy balance equation is solved by using separation of variables and combining the Kummer equation (S-K method), the distribution law of temperature in the test section is obtained, and the solution results was compared with Svendsen method, the difference between the results obtained by the two methods and the experimental results is also analyzed. The results showed that, the temperature distribution of the test section is consistent with the two methods, and the computing result of Svendsen method is generally higher than the S-K method. Under different axial distances for the take value, the maximum difference of computing results between the two methods is large when the position is farther away from the entrance, and the maximum difference is 0.27℃. Under different radial distances for the take value, with the increase of the axial distance, the difference between the results obtained by the two methods increases gradually in general, and the greater the radial distance, the greater the difference, the maximum difference is 0.27 ℃, thus the calculation results of these two kinds of methods have a higher coincide degree. The results obtained by the two methods are higher than the experimental results, but the difference is small, the results obtained by the S-K method are closer to the experimental results, and this method can avoid solve the numerical integration (Svendsen method) and the inconvenience of Bessel function, so it has a certain advantages.

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Wax Deposition in Crude Oil Pipelines

Cited by 113 publications

References 2 publications

The Review of Flow Assurance Solutions With Respect to Wax and Asphaltene

The Review of Flow Assurance Solutions With Respect to Wax and Asphaltene

Wax Segregation in Oils: A Multiscale Problem

The Study on Calculation Method of Temperature Distribution of Tested Tube for Wax Deposition Experimental Loop

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