Experimental investigation of the effects of various parameters on viscosity reduction of heavy crude by oil–water emulsion

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Abstract

The effects of water content, shear rate, temperature, and solid particle concentration on viscosity reduction (VR) caused by forming stable emulsions were investigated using Omani heavy crude oil. The viscosity of the crude oil was initially measured with respect to shear rates at different temperatures from 20 to 70 °C. The crude oil exhibited a shear thinning behavior at all the temperatures. The strongest shear thinning was observed at 20 °C. A non-ionic water soluble surfactant (Triton X-100) was used to form and stabilize crude oil emulsions. The emulsification process has significantly reduced the crude oil viscosity. The degree of VR was found to increase with an increase in water content and reach its maximum value at 50 % water content. The phase inversion from oil-in-water emulsion to water-in-oil emulsion occurred at 30 % water content. The results indicated that the VR was inversely proportional to temperature and concentration of silica nanoparticles. For water-in-oil emulsions, VR increased with shear rate and eventually reached a plateau at a shear rate of around 350 s−1. This was attributed to the thinning behavior of the continuous phase. The VR of oil-in-water emulsions remained almost constant as the shear rate increased due to the Newtonian behavior of water, the continuous phase.

Original languageEnglish
Pages (from-to)170-176
Number of pages7
JournalPetroleum Science
Volume12
Issue number1
DOIs
Publication statusPublished - 2015

Fingerprint

emulsion
Emulsions
emulsions
Petroleum
viscosity
crude oil
Viscosity
Shear deformation
Crude oil
Water content
moisture content
Water
shear
Oils
oils
water content
water
thinning
shear thinning
Shear thinning

Keywords

  • Heavy crude oil
  • Non-newtonian fluid
  • Oil-in-water emulsions
  • Phase inversion
  • Viscosity reduction

ASJC Scopus subject areas

  • Economic Geology
  • Geochemistry and Petrology
  • Geology
  • Geophysics
  • Geotechnical Engineering and Engineering Geology
  • Energy Engineering and Power Technology
  • Fuel Technology

Cite this

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title = "Experimental investigation of the effects of various parameters on viscosity reduction of heavy crude by oil–water emulsion",
abstract = "The effects of water content, shear rate, temperature, and solid particle concentration on viscosity reduction (VR) caused by forming stable emulsions were investigated using Omani heavy crude oil. The viscosity of the crude oil was initially measured with respect to shear rates at different temperatures from 20 to 70 °C. The crude oil exhibited a shear thinning behavior at all the temperatures. The strongest shear thinning was observed at 20 °C. A non-ionic water soluble surfactant (Triton X-100) was used to form and stabilize crude oil emulsions. The emulsification process has significantly reduced the crude oil viscosity. The degree of VR was found to increase with an increase in water content and reach its maximum value at 50 {\%} water content. The phase inversion from oil-in-water emulsion to water-in-oil emulsion occurred at 30 {\%} water content. The results indicated that the VR was inversely proportional to temperature and concentration of silica nanoparticles. For water-in-oil emulsions, VR increased with shear rate and eventually reached a plateau at a shear rate of around 350 s−1. This was attributed to the thinning behavior of the continuous phase. The VR of oil-in-water emulsions remained almost constant as the shear rate increased due to the Newtonian behavior of water, the continuous phase.",
keywords = "Heavy crude oil, Non-newtonian fluid, Oil-in-water emulsions, Phase inversion, Viscosity reduction",
author = "Talal Al-Wahaibi and Yahya Al-Wahaibi and Al-Hashmi, {Abdul Aziz R} and Mjalli, {Farouq S.} and Safiya Al-Hatmi",
year = "2015",
doi = "10.1007/s12182-014-0009-2",
language = "English",
volume = "12",
pages = "170--176",
journal = "Petroleum Science",
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publisher = "China University of Petroleum Beijing",
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AU - Al-Wahaibi, Talal

AU - Al-Wahaibi, Yahya

AU - Al-Hashmi, Abdul Aziz R

AU - Mjalli, Farouq S.

AU - Al-Hatmi, Safiya

PY - 2015

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N2 - The effects of water content, shear rate, temperature, and solid particle concentration on viscosity reduction (VR) caused by forming stable emulsions were investigated using Omani heavy crude oil. The viscosity of the crude oil was initially measured with respect to shear rates at different temperatures from 20 to 70 °C. The crude oil exhibited a shear thinning behavior at all the temperatures. The strongest shear thinning was observed at 20 °C. A non-ionic water soluble surfactant (Triton X-100) was used to form and stabilize crude oil emulsions. The emulsification process has significantly reduced the crude oil viscosity. The degree of VR was found to increase with an increase in water content and reach its maximum value at 50 % water content. The phase inversion from oil-in-water emulsion to water-in-oil emulsion occurred at 30 % water content. The results indicated that the VR was inversely proportional to temperature and concentration of silica nanoparticles. For water-in-oil emulsions, VR increased with shear rate and eventually reached a plateau at a shear rate of around 350 s−1. This was attributed to the thinning behavior of the continuous phase. The VR of oil-in-water emulsions remained almost constant as the shear rate increased due to the Newtonian behavior of water, the continuous phase.

AB - The effects of water content, shear rate, temperature, and solid particle concentration on viscosity reduction (VR) caused by forming stable emulsions were investigated using Omani heavy crude oil. The viscosity of the crude oil was initially measured with respect to shear rates at different temperatures from 20 to 70 °C. The crude oil exhibited a shear thinning behavior at all the temperatures. The strongest shear thinning was observed at 20 °C. A non-ionic water soluble surfactant (Triton X-100) was used to form and stabilize crude oil emulsions. The emulsification process has significantly reduced the crude oil viscosity. The degree of VR was found to increase with an increase in water content and reach its maximum value at 50 % water content. The phase inversion from oil-in-water emulsion to water-in-oil emulsion occurred at 30 % water content. The results indicated that the VR was inversely proportional to temperature and concentration of silica nanoparticles. For water-in-oil emulsions, VR increased with shear rate and eventually reached a plateau at a shear rate of around 350 s−1. This was attributed to the thinning behavior of the continuous phase. The VR of oil-in-water emulsions remained almost constant as the shear rate increased due to the Newtonian behavior of water, the continuous phase.

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