The influence of the heating temperature on the yield stress and pour point of waxy crude oils

Li, Hongying; Zhang, Jinjun; Song, Chaofan; Sun, Guangyu

doi:10.1016/j.petrol.2015.10.010

Cited by 40 publications

(19 citation statements)

References 24 publications

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“…With the decline in conventional oil resources, the production of unconventional oils, such as waxy crude and heavy crude oils, has increased (Li et al 2015). Approximately, 20% of the world oil reserves are waxy crude oil and half of the recoverable oil reserves are heavy crude oil (Ghannam et al 2012;Kumar et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Effect of surfactants and their blend with silica nanoparticles on wax deposition in a Malaysian crude oil

et al. 2018

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The present study investigated the wax deposition tendencies of a light Malaysian crude oil (42.4°API), and the wax inhibiting potential of some surfactants and their blends with nanoparticles. With the knowledge that the majority of the wax inhibition research revolved around polymeric wax inhibitors, which cause environmental issues, we highlighted the potential of surfactants and their blend with SiO 2 nanoparticles as wax deposition inhibitors. Different surfactants including oil-based, silane-based, Gemini and bio-surfactants were considered as primary surfactants. The primary surfactants and their respective blends at a concentration of 400 ppm were screened as wax inhibitor candidates using cold finger apparatus. The screening results showed a significant influence on the paraffin inhibition efficiency on wax deposition by using 400 ppm of silane-based surfactant, which decreased the wax deposition up to 53.9% as compared to that of the untreated crude oil. The inhibition efficiency among the silane-based surfactant (highest) and bio-surfactant (lowest) revealed an appreciable difference up to 36.5%. Furthermore, the wax from the treated sample was found to deposit in a thin gel-like form, which adhered inadequately to the surface of the cold finger. A further investigation by blending the 400 ppm silane-based surfactant with a 400 ppm SiO 2 nanoparticle suspension in a load ratio of 3:1 found that the wax inhibition decreased up to 81% as compared to the scenario when they were not added. However, we have shown that the synergy between the silane-based surfactant and the nanoparticles is influenced by the concentration and load ratio of surfactant and nanoparticles, residence time, differential temperature and rotation rate.

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Section: Introductionmentioning

confidence: 99%

Effect of surfactants and their blend with silica nanoparticles on wax deposition in a Malaysian crude oil

et al. 2018

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“…Pour point (PP) is defined as the lowest temperature at which CO ceases to flow, for waxy COs the PP is in the range of 15–51 °C [ 12 ]. PP is a multiple of 3 °C or 5°F and gel point (GP) is defined as 3 °C lesser than the PP [ 13 ]. The PP and yield stress (YS) are two important flow properties i.e.…”

Section: Introductionmentioning

confidence: 99%

The effects of SKO on Assam crude oil

Robidas

Gogoi

2022

Korea-Aust. Rheol. J.

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“…Shear thinning fluid with yield stress plays an important role in industrial applications. Research on such fluids is not yet systematic, but there are some valuable studies to learn from the work of Li et al, 13 which researched the yield stress of waxy crude oil under different conditions. Moreover, Bingham fluid, as a constitutive model with yield stress, has received increasing attention since the middle of the last century.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Behavioral Characteristics in a Gas and Heavy Oil Stratified Flow According to the Herschel–Bulkley Fluid Model

et al. 2020

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At present, most researches on gas–liquid two-phase flow use a power-law fluid model. However, with the development of unconventional petroleum resources and the restarting of heavy oil, the fluid showed strong yield characteristics. The power-law constitutive will not be able to express the yield-pseudoplastic fluid rheological properties. In order to make the study applicable to a larger range of shear rates, this study used the Herschel–Bulkley fluid model to discuss the gas–liquid flow characteristics. Based on the Herschel-Bulkley fluid constitutive, a two-fluid model, combined with dimensionless and iterative calculation methods, was used to theoretically derive the prediction model of liquid holdup and pressure drop for gas–liquid stratified flow. The effects of non-Newtonian fluid rheological parameters, flow conditions, and pipeline geometry on Herschel–Bulkley fluid and gas stratified flow were further analyzed. The results show that the power-law index n and the yield stress τ 0 (characterizing the rheological characteristics of the liquid phase) have significant effects on the gas–liquid two-phase stratified flow. Specifically, the enhanced liquid yield and shear thinning characteristics will lead to an increase in liquid holdup and a decrease in pressure drop. Comparing with the experimental data, the calculation model proposed in this work has a good prediction effect and provides new insights into the flow behavior of gas and waxy heavy oil with yield stress.

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The influence of the heating temperature on the yield stress and pour point of waxy crude oils

Cited by 40 publications

References 24 publications

Effect of surfactants and their blend with silica nanoparticles on wax deposition in a Malaysian crude oil

Effect of surfactants and their blend with silica nanoparticles on wax deposition in a Malaysian crude oil

The effects of SKO on Assam crude oil

Evaluation of the Behavioral Characteristics in a Gas and Heavy Oil Stratified Flow According to the Herschel–Bulkley Fluid Model

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