Flow Patterns in Heavy Crude Oil-Water Flow

Bannwart, Antonio Carlos; Rodriguez, Oscar Maurício Hernandez; Carvalho, Carlos H. M. de; Wang, Isabela S.; Vara, Rosa M. O.

doi:10.1115/1.1789520

Cited by 96 publications

(51 citation statements)

References 9 publications

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“…The dots in Figure 2, which represent the experimental data, correspond to all situations where the coreannular flow pattern was observed. According to Rodriguez and Bannwart, the experimentally obtained minimum oil holdup, which is related to the beginning of the transition from Annular to Intermittent flow pattern (refer to Bannwart et al, 2 for a detailed description of heavy oil-water flow patterns), was e 1,min 5 0.42. By substituting e 1,min into Eq.…”

Section: Kelvin-helmholtz's Criterion (K-h)mentioning

confidence: 99%

“…By analogy with gas-liquid mixtures, these can be grouped into three categories: dispersed flow, separated flow, and intermittent flow. 2 Dispersed flow includes oil bubbles in water, water drops in oil, and also water-in-oil and oil-in-water emulsions. Intermittent flows consist of relatively large oil bubbles separated by water slugs.…”

Section: Introductionmentioning

confidence: 99%

“…Recently, the use of the core-annular flow pattern has been proposed as an attractive technological alternative to produce heavy oils in the Brazilian deep water production scenario by adding relatively small amounts of water, so as to lubricate the flow. [2][3][4][5][6][7][8][9] The observation of all these flow patterns in a single apparatus depends on the fluid properties, pipe size, and geometry involved. For example, Charles et al 10 performed equal density experiments with oil and water in a 2.54 cm I.D.…”

Section: Introductionmentioning

confidence: 99%

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Stability analysis of core‐annular flow and neutral stability wave number

Rodriguez

Bannwart

2007

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).A general transition criterion is proposed in order to locate the core-annular flow pattern in horizontal and vertical oil-water flows. It is based on a rigorous one-dimensional two-fluid model of liquid-liquid two-phase flow and considers the existence of critical interfacial wave numbers related to a non-negligible interfacial tension term to which the linear stability theory still applies. The viscous laminar-laminar flow problem is fully resolved and turbulence effects on the stability are analyzed through experimentally obtained shape factors. The proposed general transition criterion includes in its formulation the inviscid Kelvin-Helmholtz's discriminator. If a theoretical maximum wavelength is considered as a necessary condition for stability, a stability criterion in terms of the Eo¨tvo¨s number is achieved. Effects of interfacial tension, viscosity ratio, density difference, and shape factors on the stability of core-annular flow are analyzed in detail. The more complete modeling allowed for the analysis of the neutral-stability wave number and the results strongly suggest that the interfacial tension term plays an indispensable role in the correct prediction of the stable region of core-annular flow pattern. The incorporation of a theoretical minimum wavelength into the transition model produced significantly better results. The criterion predictions were compared with recent data from the literature and the agreement is encouraging.

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Section: Kelvin-helmholtz's Criterion (K-h)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Stability analysis of core‐annular flow and neutral stability wave number

Rodriguez

Bannwart

2007

AIChE Journal

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“…The viscosity-temperature relationship of Model oil 2# is linear and its viscosity decreasing gradient is smaller than other samples. Moreover, in the flow loop experiments, the temperatures of the pump keep increasing with the prolonging of time, leading to the temperature difference between the start and end of the experiment [1]. Thus it is hard to obtain stable pressure gradient data in a short period.…”

Section: Rheological Modelmentioning

confidence: 99%

Rheological and Emulsification Behavior of Xinjiang Heavy Oil and Model Oils

Jing¹,

Tan²,

Hu³

et al. 2016

TOEFJ

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Abstract:Transparent model oils are commonly used to study the flow patterns and pressure gradient of crude oil-water flow in gathering pipes. However, there are many differences between the model oil and crude oils. The existing literatures focus on the flow pattern transition and pressure gradient calculation of model oils. This paper compares two most commonly used model oils (white mineral oil and silicon oil) with Xinjiang crude oil from the perspectives of rheological properties, oil-water interfacial tensions, emulsion photomicrographs and demulsification process. It indicates that both the white mineral oil and the crude oils are pseudo plastic fluids, while silicon oil is Newtonian fluid. The viscosity-temperature relationship of white mineral oil is similar to that of the diluted crude oil, while the silicon oil presents a less viscosity gradient with the increasing temperature. The oil-water interfacial tension can be used to evaluate the oil dispersing ability in the water phase, but not to evaluate the emulsion stability. According to the Turbiscan lab and the stability test, the model oil emulsion is less stable than that of crude oil, and easier to present water separation.

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“…1 The high viscosity crude and heavy oil were used in measurements 3,8,9 also. Experimental investigation of the dual continuous flow phenomena in oil-water mixture flow in horizontal pipes was performed in.…”

mentioning

confidence: 99%

Numerical Analysis of Oil-Water Two-Phase Flow in Pipe Systems

Burlutskii¹

2017

IPCSE

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Flow Patterns in Heavy Crude Oil-Water Flow

Cited by 96 publications

References 9 publications

Stability analysis of core‐annular flow and neutral stability wave number

Stability analysis of core‐annular flow and neutral stability wave number

Rheological and Emulsification Behavior of Xinjiang Heavy Oil and Model Oils

Numerical Analysis of Oil-Water Two-Phase Flow in Pipe Systems

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