Characterization of the viscosity reducing efficiency of CO2 on heavy oil by a newly developed pressurized stirring-viscometric apparatus

Sun, Guangyu; Li, Chuanxian; Wei, Guoqing; Yang, Fei

doi:10.1016/j.petrol.2017.06.009

Cited by 18 publications

(16 citation statements)

References 35 publications

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“…From the curves portrayed in Figure , it is easy to see that the effective viscosity decreases exponentially with the increment of CO 2 pressure. The variation trend has a resemblance to that of pure crude oil saturated with CO 2 , which was studied by us earlier . It is worth noting that the extent of viscosity reduction is already significant when the CO 2 pressure is just boosted to 2.0 MPa.…”

Section: Resultssupporting

confidence: 60%

“…The final expression is listed as eq . Our team has successfully applied this approach to measure the rheology of water–crude oil mixtures ,− and CO 2 -dissolved heavy oil Based on the above principles, the procedures of the effective viscosity measurement are developed as follows.…”

Section: Methodsmentioning

confidence: 99%

“… Based on the above principles, the procedures of the effective viscosity measurement are developed as follows. (1) The idle torque is determined first and eliminated from the total torque according to the method introduced in our previous study . (2) The crude oil sample and brine water with a total volume of 300 mL are poured into the reactor sequentially according to their specified volume ratio.…”

Section: Methodsmentioning

confidence: 99%

“…(1) The idle torque is determined first and eliminated from the total torque according to the method introduced in our previous study. 29 (2) The crude oil sample and brine water with a total volume of 300 mL are poured into the reactor sequentially according to their specified volume ratio. Then, the designated experimental temperature in the reactor is set by operating the circulating water bath, and the water−crude oil mixed fluid is kept at this temperature for 30 min.…”

Section: Emulsion Stability Testmentioning

confidence: 99%

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Experimental Study on the Effective Viscosity of Unstable CO₂ Flooding Produced Fluid with the Energy Dissipation Method

Sun

Zhang

Wei

et al. 2019

Ind. Eng. Chem. Res.

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As a kind of enhanced oil recovery technology, CO2 flooding is being employed more and more widely in oil fields. In CO2 flooding produced fluid, crude oil, water, and CO2 are transported simultaneously, and part of the fluid may be emulsified. The dissolving of CO2 may affect the kinetic stability of the emulsion formed in the mixed fluid and change the effective viscosity of the fluid as well. In this study, the solubility of CO2 in the water-in-crude oil emulsion was measured, and the variation of water/crude oil interfacial viscoelasticity was probed after the dissolution of CO2, so the influence of CO2 dissolution on emulsion stability and its mechanism could be uncovered. After the stability of the mixed fluid was verified, a viscosity measuring equipment was designed according to the principle of energy dissipation. With the help of this equipment, the effects of the CO2 solution pressure, temperature, oil/water ratio, and shear intensity on the effective viscosity of the mixed fluid were explored. The results reveal that the CO2 dissolution worsens the stability of the water-in-crude oil emulsion. The mechanism lies in the structural weakening of the interface by the action of the dissolved CO2 besides its viscosity-reducing effect. The effective viscosity of the CO2–water–crude oil mixed fluid decreases exponentially with the increasing CO2 solution pressure. Moreover, the viscosity reduction effect of the dissolved CO2 on the mixed fluid is more pronounced than on the pure crude oil.

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Section: Resultssupporting

confidence: 60%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Emulsion Stability Testmentioning

confidence: 99%

See 2 more Smart Citations

Experimental Study on the Effective Viscosity of Unstable CO₂ Flooding Produced Fluid with the Energy Dissipation Method

Sun

Zhang

Wei

et al. 2019

Ind. Eng. Chem. Res.

Self Cite

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“…However, it can lead to waste of input energy, and the reduction of product quality when the system is not suitable. Therefore, it is necessary to have more studies to determine the specification of the Caltex Aquatex 3180 lubricant agitator model to improve the uniformity of the solution [2][3][4][5][6][7][8]13].…”

Section: Introductionmentioning

confidence: 99%

Application of Similarity Method and Dimensional Analysis in Determining the Performance Parameters of Agitator Paddles for Caltex Aquatex 3180 Cutting Oil

Tam

Quan²

2020

Int. J. Eng. Tech. Mgmt. Res.

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Aquatex 3180 is the general purpose soluble oil, formulated for use in a wide variety of machining operations. In fact, the natural diffusion in the liquid is very slow, especially the mixing ratio, and the homogeneity of the solution is difficult to achieve according to the manufacturer's recommendation. Hence, the agitator is required to improve the uniformity of the solution in that the obtained cutting fluid can be effectively used in machining processes to fulfill the role of cooling and lubricating. In this work, the application of the similarity method and dimensional analysis for studying agitator model for mixing Aquatex 3180 cutting oil to build the set of input parameters in the experimental process. The results reveal that the input parameters in the study of the agitator model using 9 similarity criterions πi (i = 1 ... 9) instead of 12 independent parameters. In addition, the standard π2 can characterize the displacement properties of the fluid flow considering the influence of gravity. It means that the number of experiments reduce but still ensure that many experimental input parameters are still guaranteed, therefore ensuring proper description of the actual operation of the machine.

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Enhancement of lipid extraction for efficient methyl ester production from Chlamydomonas sp.

Sivaramakrishnan

Incharoensakdi

2019

J Appl Phycol

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Characterization of the viscosity reducing efficiency of CO2 on heavy oil by a newly developed pressurized stirring-viscometric apparatus

Cited by 18 publications

References 35 publications

Experimental Study on the Effective Viscosity of Unstable CO₂ Flooding Produced Fluid with the Energy Dissipation Method

Experimental Study on the Effective Viscosity of Unstable CO₂ Flooding Produced Fluid with the Energy Dissipation Method

Application of Similarity Method and Dimensional Analysis in Determining the Performance Parameters of Agitator Paddles for Caltex Aquatex 3180 Cutting Oil

Enhancement of lipid extraction for efficient methyl ester production from Chlamydomonas sp.

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Characterization of the viscosity reducing efficiency of CO2 on heavy oil by a newly developed pressurized stirring-viscometric apparatus

Cited by 18 publications

References 35 publications

Experimental Study on the Effective Viscosity of Unstable CO2 Flooding Produced Fluid with the Energy Dissipation Method

Experimental Study on the Effective Viscosity of Unstable CO2 Flooding Produced Fluid with the Energy Dissipation Method

Application of Similarity Method and Dimensional Analysis in Determining the Performance Parameters of Agitator Paddles for Caltex Aquatex 3180 Cutting Oil

Enhancement of lipid extraction for efficient methyl ester production from Chlamydomonas sp.

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Product

Resources

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Experimental Study on the Effective Viscosity of Unstable CO₂ Flooding Produced Fluid with the Energy Dissipation Method

Experimental Study on the Effective Viscosity of Unstable CO₂ Flooding Produced Fluid with the Energy Dissipation Method