Overview of emulsified viscosity reducer for enhancing heavy oil recovery

Sun, Jianghe; Zhang, F S; Wu, Yongbin; Liu, G L; Li, X N; Su, H M; Zhu, Zhengjun

doi:10.1088/1757-899x/479/1/012009

Cited by 15 publications

(8 citation statements)

References 3 publications

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“…They aggregate together into macromolecules, which results in high viscosity and poor fluidity as a consequence of compromising the flow and production process [3][4][5]. The heavy oil viscosity typically ranges from 50 to 50,000 mPa.s at reservoir temperature and pressure [6][7][8][9][10][11]. Therefore, reducing the heavy oil viscosity is a prerequisite for improved fluidity and transportation.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Molecular Dynamics Simulation of Amphiphilic Low Molecular Weight Polymer Viscosity Reducer for Heavy Oil Cold Recovery

Liu

Xie

et al. 2021

Energies

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In order to reduce the viscosity of heavy oil, the performance of emulsifying viscosity reducers is limited. In this study, a new kind of amphiphilic low molecular weight viscosity reducer was prepared by emulsion copolymerization of acrylamide (AM), acrylic acid (AA), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), and Butene benzene (PB). The synthesis feasibility and viscosity reduction mechanism of viscosity reducer in heavy oil were explored using Materials Studio software from the perspective of molecular dynamics. The results of the molecular dynamics simulation revealed that the addition of viscosity reducer into heavy oil varied the potential energy, non-potential energy, density and hydrogen bond distribution of heavy oil. Benefiting from its structure, the benzene ring in PB was well embedded in the interlayer structure of asphaltene, contributing to weaken the network structure of the heavy oil. Moreover, the two strong polar groups (COO− and SO3−) of AA and AMPS, which constituted the branched chains of the viscosity reducer’s molecular structure, gradually disassembled the network structure from the ‘inward’ to the ‘outward’ of the heavy oil network structure, thereby driving heavy oil viscosity reduction (as clarified by molecular dynamics). Owing to its temperature resistance, this kind of new amphiphilic low molecular copolymer could be an effective viscosity reducer for heavy oil cold recovery at elevated temperatures.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Molecular Dynamics Simulation of Amphiphilic Low Molecular Weight Polymer Viscosity Reducer for Heavy Oil Cold Recovery

Liu

Xie

et al. 2021

Energies

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“…China has abundant heavy oil resources, which account for over 20% of the global total oil resources. 1 Two main exploitation techniques, i.e., thermal and cold recovery methods, are used to enhance heavy oil recovery. Thermal recovery uses heat to decrease the viscosity of the heavy oil, 2 whereas cold recovery uses chemical methods to enhance the mobility of the heavy oil without changing the temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Global heavy oil accounts for over 70% of the total remaining oil resources. China has abundant heavy oil resources, which account for over 20% of the global total oil resources . Two main exploitation techniques, i.e., thermal and cold recovery methods, are used to enhance heavy oil recovery.…”

Section: Introductionmentioning

confidence: 99%

Effect of HMP-C₁₆AM on Enhancing Heavy Oil Recovery by Emulsification

et al. 2020

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The hydrophobically modified polymer with N-hexadecylacrylamide (C 16 AM) as hydrophobic group (HMP-C 16 AM) is the most widely used polymeric emulsifier in oil fields. Given its amphiphilic property, aqueous HMP-C 16 AM solution can form a stable emulsion with the oil phase under the action of shear force. In this study, we investigated the emulsifying property of HMP-C 16 AM for heavy oil from multiple angles. First, the properties of the heavy oil emulsion using HMP-C 16 AM were studied under different conditions. Second, a glass-etched visual micromodel was further applied to study the emulsification of heavy oil in the pore throat during the HMP-C 16 AM flooding. Results showed that the increased stability of the heavy oil emulsion resulted in the small average particle size of oil droplets and increased the viscosity and the viscoelasticity. The combined system of low-salinity water and HMP-C 16 AM improved the stability of the heavy oil emulsion. As shown by the microscopic oil displacement test, the heavy oil was emulsified in the pore throat, and the heavy oil recovery was enhanced remarkably in the outlet and edge regions of the micromodel after the HMP-C 16 AM flooding. The study provides theoretical guidance for the next field experiment.

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“…World is rich in unconventional oil and various alternatives to petroleum. However, conventional oil production declines so quickly that it is likely that these unconventional oil resources cannot be put into production fast enough, and thus will not be compensated sufficiently [1][2][3][4][5]. Surface plasmon polaritons (SPPs) are electromagnetic fields that propagate along a metal-insulator interface.…”

Section: Introductionmentioning

confidence: 99%

Multiple Fano resonances Based on the Rectangular cavity resonator and crescent-shaped cavity resonator

Zhu

Wang

2020

Preprint

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World is rich in unconventional oil and various alternatives to petroleum. However, conventional oil production declines so quickly that it is likely these unconventional oil resources cannot be put into production fast enough, and thus will not be compensated sufficiently. We realize detecting rapid detection of water content in heavy oil. The waveguide consists of a metal-insulator-metal (MIM) waveguide, rectangular cavity resonator, and crescent-shaped cavity resonator. The effects of the coupling distance, geometry of the crescent-shaped cavity resonator and its rotation angle, and length and width of the rectangular cavity resonator on the Fano resonance lines were numerically analyzed. Multiple Fano resonances can be produced as the rotation angle of the crescent-shaped cavity resonator is adjusted, and the sensor’s refractive index sensitivity was found to be \(935.71 \text{n}\text{m}/\text{R}\text{I}\text{U}\). By measuring the water content in heavy oil, we found that the Fano resonance lines shift toward shorter wavelengths as the volume fraction of water content increases. The detection resolution in heavy oil \(1.79\times {10}^{-9}\). The results presented here show that water content in heavy oil can be calculated using the measured change in the Fano resonance wavelength.

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Overview of emulsified viscosity reducer for enhancing heavy oil recovery

Cited by 15 publications

References 3 publications

Synthesis and Molecular Dynamics Simulation of Amphiphilic Low Molecular Weight Polymer Viscosity Reducer for Heavy Oil Cold Recovery

Synthesis and Molecular Dynamics Simulation of Amphiphilic Low Molecular Weight Polymer Viscosity Reducer for Heavy Oil Cold Recovery

Effect of HMP-C₁₆AM on Enhancing Heavy Oil Recovery by Emulsification

Multiple Fano resonances Based on the Rectangular cavity resonator and crescent-shaped cavity resonator

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Overview of emulsified viscosity reducer for enhancing heavy oil recovery

Cited by 15 publications

References 3 publications

Synthesis and Molecular Dynamics Simulation of Amphiphilic Low Molecular Weight Polymer Viscosity Reducer for Heavy Oil Cold Recovery

Synthesis and Molecular Dynamics Simulation of Amphiphilic Low Molecular Weight Polymer Viscosity Reducer for Heavy Oil Cold Recovery

Effect of HMP-C16AM on Enhancing Heavy Oil Recovery by Emulsification

Multiple Fano resonances Based on the Rectangular cavity resonator and crescent-shaped cavity resonator

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Effect of HMP-C₁₆AM on Enhancing Heavy Oil Recovery by Emulsification