Characterization of Water-in-North Sea Acidic Crude Oil Emulsions by Means of Rheology, Droplet Size, and Laminar Flow in Pipeline

Keleşoğlu, Serkan; Pettersen, B.H.; Sjöblom, Johan

doi:10.1080/01932691.2011.574937

Cited by 11 publications

(10 citation statements)

References 15 publications

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“…To solve these problems, considerable theoretical and experimental studies have been carried out using two different approaches: synthetic emulsions measured in a rheometer and emulsions induced in pipe flow . However, a few works have been carried out by simultaneously using two systems . Masalova et al studied the rheological and transport properties of water‐in‐oil emulsions.…”

Section: Introductionmentioning

confidence: 99%

“…The wall shear rate in a laminar power-law fluid flow can be obtained as follows: [18,22] g Á w ¼ 32Q pD…”

Section: Flow Characterization Of Emulsions In Pipesmentioning

confidence: 99%

“…Results showed that experimental data obtained in the rheometer could predict emulsion flow characteristics in large-diameter pipes. KeleS soglu et al [17,18] investigated the rheological behaviour and pipe flow properties of water-in-oil emulsions using a stress-controlled rheometer and an indoor flow loop, respectively. The apparent viscosities of pipe flow emulsions calculated by the frictional pressure drop were compared with those from the rheology measurement.…”

Section: Introductionmentioning

confidence: 99%

“…[8][9][10][11][12][13][14][15] However, a few works have been carried out by simultaneously using two systems. [16][17][18][19] Masalova et al [16] studied the rheological and transport properties of water-in-oil emulsions. A relationship between the estimation of rheology measurements and the predictions calculated with direct pipe flow data was presented.…”

Section: Introductionmentioning

confidence: 99%

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Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Zhang

2016

Can J Chem Eng

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In this work, the rheological behaviour of oil and water emulsions and their flow characterization were studied using a Haake RS6000 rheometer and a lab scale flow loop. The rheological properties of the synthetic emulsions were investigated at oil volume fractions from 0.1-1.0 L/L and shear rates from 0.001-1000 s À1 at a system temperature of 20 8C. The emulsions flow, formed by the SMV static mixer installed before the test section, was observed in the 2-m long horizontal pipes with 25 and 50 mm inner diameters at different mixture flow rates from 0.01-7.00 m 3 /h. A comparison between rheological measurements and laminar flow data shows that the values of the Sauter mean droplet diameters formed by the SMV static mixer are approximately one order of magnitude bigger than those measured by the rheometer. For oil-in-water emulsions with low oil content, the stress-strain relationships obtained in the rheometer are more suitable for predicting the transport characteristics of the emulsions with a large pipe diameter than those with a small pipe diameter. In addition, the phase inversion points in the pipe flow are closer to those measured at high shear rates in the rheometer. Therefore, the apparent viscosity obtained by the rheology measurements at high shear rates could be introduced for accurate calculations of the mixture Reynolds number and the friction factor in emulsions flow.

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Section: Introductionmentioning

confidence: 99%

“…The wall shear rate in a laminar power-law fluid flow can be obtained as follows: [18,22] g Á w ¼ 32Q pD…”

Section: Flow Characterization Of Emulsions In Pipesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Zhang

2016

Can J Chem Eng

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“…The results indicated that with increasing the dispersed phase volume fraction, the mean droplet size and emulsion viscosity increases. 26 Filho et al reported that the water-in-oil emulsion droplet size of a crude oil containing 0.79 % m/m of asphaltenes increases after 60 days of aging. 19 In 2013, Zhang et al carried out experiments on the apparent viscosity of oil-water emulsion.…”

Section: Introductionmentioning

confidence: 99%

Towards a mechanistic understanding of rheological behaviour of water-in-oil emulsion: Roles of nanoparticles, water volume fraction and aging time

Pajouhandeh¹,

Kavousi²,

Schaffie³

et al. 2016

S.Afr.j.chem.

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The viscosity of water-oil emulsions plays an important role in oil production and transportation. The objective of this study was to improve the basic understanding of the influence of nanoparticles on the viscosity of water-in-oil emulsions. Using crude oil and different industrial nanomaterials, the droplet size distribution, droplet mean size, and rheological models of emulsions were investigated. Experimental results show that the addition of nanoparticles increases the crude oil viscosity; however, the Newtonian flow behaviour of oil is not affected by nanoparticles. It is observed that the viscosity of crude oil increased from 36.5 to 49 cP when the nanoparticle concentration was elevated from 0 to 0.1 wt%. From the results of rheological experiments, it can be concluded that the influence of nanoparticles on the emulsion viscosity is mainly affected by the type and amount of nanoparticles, water/oil-ratio and aging time. Mean droplet diameter decreased from 5.68 to 4.11 micrometre when 0.1 wt% nanoparticles were added to emulsion. The results also suggest that the properties of stabilized water-in-oil emulsions are significantly time-dependent, and the droplet size and viscosity of emulsions is reduced by time. Most of previously published correlations have huge errors and could not precisely predict the apparent viscosities of non-solid stabilized and solid-stabilized emulsions. None of the previously utilized equations did ever consider the effect of added solids to the emulsion.

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Oil Films

and¹,

Simon²

2014

Oil Spill Remediation

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Characterization of Water-in-North Sea Acidic Crude Oil Emulsions by Means of Rheology, Droplet Size, and Laminar Flow in Pipeline

Cited by 11 publications

References 15 publications

Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Rheological behaviour of oil and water emulsions and their flow characterization in horizontal pipes

Towards a mechanistic understanding of rheological behaviour of water-in-oil emulsion: Roles of nanoparticles, water volume fraction and aging time

Oil Films

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