Formation and aging of incipient thin film wax‐oil gels

Singh, Probjot; Venkatesan, R.; Fogler, H. Scott; Nagarajan, Narayana Rao

doi:10.1002/aic.690460517

Cited by 473 publications

(800 citation statements)

References 26 publications

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“…The wax content has a strong function of aging time and temperature difference across it. The wax content of the gel deposit increases with time until it reach plateau as observed by Singh [9]. It also should be noted that, CCN depends on the composition of the wax oil mixture and wall temperature.…”

Section: Basic Principlementioning

confidence: 55%

Laboratory Deposition Apparatus to Study the Effects of Wax Deposition on Pipe Magnetic Field Leakage Signals

Karim

Ismail

Awang

2014

MATEC Web of Conferences

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Abstract.Accurate technique for wax deposition detection and severity measurement on cold pipe wall is important for pipeline cleaning program. Usually these techniques are validated by conventional techniques on laboratory scale wax deposition flow loop. However conventional techniques inherent limitations and it is difficult to reproduce a predetermine wax deposit profile and hardness at designated location in flow loop. An alternative wax deposition system which integrates modified pour casting method and cold finger method is presented. This system is suitable to reproduce high volume of medium hard wax deposit in pipe with better control of wax deposit profile and hardness.

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Section: Basic Principlementioning

confidence: 55%

Laboratory Deposition Apparatus to Study the Effects of Wax Deposition on Pipe Magnetic Field Leakage Signals

Karim

Ismail

Awang

2014

MATEC Web of Conferences

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“…Various mechanisms have been proposed during the past decades, including molecular diffusion, shear dispersion, gravity settling, Brownian diffusion, etc. Molecular diffusion and aging effects have been supported as the predominant mechanisms, which clearly explain the flow rate effect and enrichment of heavy components in the deposit with time (Singh et al, 2000;Singh et al, 2001;Hernandez et al, 2004).…”

Section: Introductionmentioning

confidence: 92%

Effect of Oil Temperature on the Wax Deposition of Crude Oil With Composition Analysis

Quan

Wang

Wang³

et al. 2016

Braz. J. Chem. Eng.

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-Wax deposition behavior was investigated in a set of one-inch experiment flow loops, using a local crude oil with high wax content. The temperature of the oil phase is chosen as a variable parameter while the temperature of the coolant media is maintained constant. Detailed composition of the deposit is characterized using High Temperature Gas Chromatography. It was found that the magnitude of the diffusion of the heavier waxy components (C 35 -C 50 ) decreases when the oil temperature decreases, but the magnitude of the diffusion of the lighter waxy components increases. This result means that the diffusion of wax molecules shifts towards lower carbon number, which further proves the concept of molecular diffusion. Meanwhile, a meaningful phenomenon is that the mass of the deposit increases with the oil temperature decrease, which definitely proves the influence of wax solubility on deposition, while the formation of an incipient gel layer reflects the fact that an increase in the mass of the deposit does not mean a larger wax percentage fraction at lower oil temperature.

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“…At reservoir conditions where the temperature ranges around 70 to 150°C with pressure ranges of 50 to 100MPa, the solubility of the paraffins in the crude oil is adequately high. The wax molecules are fully dissolved in the crude oil mixture resulting in a single-phase crude oil, in the absence of other components and contaminants and the crude oil behaves predominantly Newtonian with low viscosity [3]. Once the crude oil leaves the reservoir at a high temperature and flows through cold pipelines placed on the seabed with temperature ranging normally from 20qC down to 5°C, the crude oil temperature begins to drop dramatically due to the heat loss to the surroundings.…”

Section: Introductionmentioning

confidence: 99%

Rheological Investigation on the Effect of Shear and Time Dependent Behavior of Waxy Crude Oil

Japper-Jaafar

Bhaskoro

Sariman

et al. 2014

MATEC Web of Conferences

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Abstract-Rheological measurements are essential in transporting crude oil, especially for waxy crude oil. Several rheological measurements have been conducted to determine various rheological properties of waxy crude oil including the viscosity, yield strength, wax appearance temperature (WAT), wax disappearance temperature (WDT), storage modulus and loss modulus, amongst others, by using controlled stress rheometers. However, a procedure to determine the correct parameters for rheological measurements is still unavailable in the literature. The paper aims to investigate the effect of shear and time dependent behaviours of waxy crude oil during rheological measurements. It is expected that the preliminary work could lead toward a proper rheological measurement guideline for reliable rheological measurement of waxy crude oil.

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Formation and aging of incipient thin film wax‐oil gels

Abstract: A fundamental study of the deposition and aging of a thin incipient wax-oil gel that is formed during the flow of waxy oils in cooled pipes

Cited by 473 publications

References 26 publications

Laboratory Deposition Apparatus to Study the Effects of Wax Deposition on Pipe Magnetic Field Leakage Signals

Laboratory Deposition Apparatus to Study the Effects of Wax Deposition on Pipe Magnetic Field Leakage Signals

Effect of Oil Temperature on the Wax Deposition of Crude Oil With Composition Analysis

Rheological Investigation on the Effect of Shear and Time Dependent Behavior of Waxy Crude Oil

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