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Research Papers: Petroleum Engineering

Effects of the Dispersed Phase on Oil/Water Wax Deposition

[+] Author and Article Information
Jing Gong

e-mail: ydgj@cup.edu.cn

Wei Yang

Beijing Key Laboratory of Urban Oil and Gas Distribution Technology,
China University of Petroleum-Beijing,
Beijing, China 102249

1Corresponding author.

Contributed by the Petroleum Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received September 5, 2012; final manuscript received February 28, 2013; published online May 31, 2013. Assoc. Editor: Sarma V. Pisupati.

J. Energy Resour. Technol 135(4), 042902 (May 31, 2013) (7 pages) Paper No: JERT-12-1205; doi: 10.1115/1.4023932 History: Received September 05, 2012; Revised February 28, 2013

In the study of the foundation of the oil / water wax deposition experiment, the emulsification characteristics of crude oil emulsion with high wax content have gradually become the hot research area. In the current research of emulsification characteristics of oil/water emulsion, the attention has been focused on the study of the effects of water cut, stirring speed, particle size distribution on the viscosity of waxy crude oil emulsion in the experiment, in which heavy oil and simulated oil are adopted as the working fluids. In this study, the emulsion with different water cut and stirred by different speed was prepared under three different temperature conditions, the temperature above the wax appearance temperature (WAT), near the WAT, and below the WAT. The polarization microscope and rotary viscometer were applied to measure the effects of the particle size of the dispersed phase and waxy crystal distribution on the oil/water emulsion viscosity. The results suggest that preparing the temperature for crude oil emulsion with high wax content has an important influence on the emulsion microstructure. This study lays the foundation for further study of oil/water two phase dynamic wax deposition experiments.

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Figures

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Fig. 1

Schematic of cold finger system

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Fig. 2

The microscopic photo (without the polarizer) of the dispersed phase particle size distribution with the water cut 30%, stirring speed 500 rpm, preparation temperature 55 °C

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Fig. 3

The microscopic photo (without the polarizer) of the dispersed phase particle size distribution with the water cut 30%, stirring speed 1000 rpm, preparation temperature 55 °C

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Fig. 4

The microscopic photo (without the polarizer) of the dispersed phase particle size distribution when the water cut 30%, stirring speed 1500 rpm, preparation temperature 55 °C

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Fig. 5

The microscopic photo (with the polarizer) of wax crystal distribution with water cut 30%, stirring speed 500 rpm, preparation temperature 45 °C

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Fig. 6

The microscopic photo (with the polarizer) of wax crystal distribution with water cut 30%, stirring speed 1000 rpm, preparation temperature 45 °C

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Fig. 7

The microscopic photo (with the polarizer) of wax crystal distribution with water cut 30%, stirring speed 1500 rpm, preparation temperature 45 °C

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Fig. 9

The pour point of different water cut emulsion

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Fig. 8

Schematic of wax crystal adsorbs on the oil–water interface

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