State-of-the-art on ultrasonic oil production technique for EOR in China

Wang, Zhenjun; Yin, Congbo

doi:10.1016/j.ultsonch.2017.03.035

Cited by 34 publications

(6 citation statements)

References 25 publications

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“…Application results showed that the average oil recovery can be increased by 6-9%. In addition, paraffin deposition and antiscaling viscosity of crude oil can be inhibited and reduced effectively [12].…”

Section: China Expertise In Eormentioning

confidence: 99%

Untitled

2018

RAPSCI

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In the recent years, oil recovery remains one of the biggest challenges in the world. Especially in developing countries including Pakistan, production of petrochemical facilities are not properly installed. Therefore, Pakistan has to import large quantity of oil and oil based products from Middle East countries. This paper presents a review on the existing situation of petrochemical industry in Pakistan and concludes the viability of China-Pakistan cooperation in term of installing EOR technologies and helping Pakistan in mitigating the current energy crisis.

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Section: China Expertise In Eormentioning

confidence: 99%

Untitled

2018

RAPSCI

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“…Ultrasonic enhanced oil recovery technology has been applied in many aspects of petroleum industry, including demulsification by ultrasonic wave, oil pollution treatment by ultrasonic wave, wax prevention by ultrasonic wave, plugging removal by ultrasonic wave, and viscosity reduction of heavy oil by ultrasonic wave. , The main principle of ultrasonic demulsification technology is that oil and water particles continuously move to the wave belly and node due to the cavitation effect, thermal effect, and displacement effect produced by vibration, and then coalesce to generate water and oil droplets with larger diameters, and finally separate the oil and water by gravity. The application of ultrasonic technology greatly promotes the demulsification and dehydration effect of emulsion. − Through ultrasonic cavitation, the macromolecular hydrocarbons in heavy oil can be cracked into small molecular hydrocarbons, which can realize the separation of crude oil and sludge. , Ultrasonic plug removal technology is widely used in China’s oilfields.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Ultrasonic Physical–Chemical Viscosity Reduction for Different Heavy Oils

et al. 2021

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In this study, the mechanism of physical–chemical viscosity reduction of different heavy oils under ultrasonic wave is explored. Experiments of viscosity reduction and viscosity recovery of different heavy oils under ultrasonic excitation were carried out, and the optimal ultrasonic parameters, ultrasonic physical disturbance, and cavitation viscosity reduction extent of different oil samples were determined. Based on the element analysis methods, four-component analysis, gas chromatography analysis, and formation water pH value test, the micro-mechanism of the oil chemical structure change and water samples under ultrasonic wave was analyzed. The results show that the water content, temperature, and initial viscosity of heavy oil are the key to reduce the viscosity of heavy oil. The higher viscosity of the initial oil sample, the higher water content, and the temperature were needed. Compared with the lower viscosity oil sample, the higher viscosity oil sample has higher extent of cavitation viscosity reduction and lower extent of physical disturbance viscosity reduction under ultrasonic wave. After ultrasonic treatment, the contents of heteroatoms, resins, and asphaltenes in heavy oil samples with high viscosity decreased significantly, and the conversion extent of high carbon chain to low carbon chain was greater. In addition, the pH of water in heavy oils decreased after ultrasonic treatment, and the pH of water in high viscosity heavy oil decreased more significantly after ultrasonic treatment.

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“…Some of recent new downhole tools used for field-scale operation along with the key problems that could affect the widespread application of ultrasonic oil production technique in China are summarized by Wang and Yin. 32 Recently, promising results in oil removal from oily sludge were shown using ultrasonic stimulation in pilot-scale tests. 33 By and large, most of these studies have concluded that acoustic stimulation has produced promising results.…”

Section: Introductionmentioning

confidence: 99%

“…Field experiments reported by Nikolaevskiy et al suggest that vibrations have altered oil/water production characteristics at distances as much as 200 km from the vibration source such as natural seismic events or artificial explosions. Some of recent new downhole tools used for field-scale operation along with the key problems that could affect the widespread application of ultrasonic oil production technique in China are summarized by Wang and Yin . Recently, promising results in oil removal from oily sludge were shown using ultrasonic stimulation in pilot-scale tests .…”

Section: Introductionmentioning

confidence: 99%

A Pore-Scale Model for Dispersion and Mass Transfer during Acoustically Assisted Miscible Displacements in Porous Media

Khasi

Fayazi

Kantzas

2021

Ind. Eng. Chem. Res.

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Enhancing flow and transport in porous media by acoustic stimulation has been investigated for the past several decades. Most studies focused on the effect of sound propagation in immiscible displacements. Much less emphasis has been given to understand the beneficial mechanisms during miscible displacements. In this work, a pore-scale model is developed to study the influence of acoustic excitation on dispersion and mass transfer in porous media. The modeling involves first solving for the single-phase fluid flow without the acoustic field, then calculating an external acoustic pressure field across a stationary saturated medium, and finally evaluating the interaction between the acoustic field and the flowing fluid. Simulations are run at different injection velocities, wave frequencies, and acceleration amplitudes. Concentration profiles of the pore-scale model show that the mass transfer between the mobile and immobile regions is accelerated under the sonication. In addition, the dispersion coefficient is increased due to the enhanced effective diffusivity and the additional acoustically induced velocity. To quantify the enhancement in transport, dispersion and mass transfer coefficients are calculated by matching the analytical solutions of the continuum transport model with effluent concentration profiles obtained by pore-scale simulations. At lower injection rates, dispersion coefficient is more affected by acoustic excitation compared to mass transfer coefficient. Lower frequencies and higher acceleration amplitudes of the propagated waves increase the enhancements in dispersion and mass transfer coefficients. The results at higher viscosity ratios indicate that low-frequency excitation could be a promising technique for improving miscible displacements. The effects of controlling parameters are summarized in a proposed dimensionless group of AD for designing effective acoustically assisted experiments in the laboratory.

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State-of-the-art on ultrasonic oil production technique for EOR in China

Cited by 34 publications

References 25 publications

Untitled

Untitled

Mechanism of Ultrasonic Physical–Chemical Viscosity Reduction for Different Heavy Oils

A Pore-Scale Model for Dispersion and Mass Transfer during Acoustically Assisted Miscible Displacements in Porous Media

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