Evaluation of the oil/water selective plugging performance of nano-polymer microspheres in fractured carbonate reservoirs

Wang, Jie; Zhou, Fujian; Li, Junjian; Yang, Kai; Zhang, Lu-feng; Fan, Fan

doi:10.1631/jzus.a1900249

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…In comparison with conventional Polyacrylamide gel plugging agents of the same type [40][41][42][43][44], DPGs exhibit superior plugging efficiency and still retain a certain plugging ability at a distance from the injection well. The cost-effectiveness analysis suggests that DPGs hold considerable potential for practical applications.…”

Section: Formula Of Bulk Gelsmentioning

confidence: 99%

Probing the Effect of Young’s Modulus on the Reservoir Regulation Abilities of Dispersed Particle Gels

Wang,

Zhu,

Jiang

et al. 2023

Gels

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The mechanical strength of dispersed particle gels (DPGs), which can be directly characterized by Young’s modulus, is an important parameter affecting reservoir regulation performance. However, the effect of reservoir conditions on the mechanical strength of DPGs, as well as the desired range of mechanical strength for optimum reservoir regulation performance, have not been systematically studied. In this paper, DPG particles with different Young’s moduli were prepared and their corresponding migration performances, profile control capacities and enhanced oil recovery abilities were studied by simulated core experiments. The results showed that with increase in Young’s modulus, the DPG particles exhibited improved performance in profile control as well as enhanced oil recovery. However, only the DPG particles with a modulus range of 0.19–0.762 kPa could achieve both adequate blockage in large pore throats and migration to deep reservoirs through deformation. Considering the material costs, applying DPG particles with moduli within the range of 0.19–0.297 kPa (polymer concentration: 0.25–0.4%; cross-linker concentration: 0.7–0.9%) would ensure optimum reservoir control performance. Direct evidence for the temperature and salt resistance of DPG particles was also obtained. When aged in reservoir conditions below 100 °C and at a salinity of 10 × 104 mg·L−1, the Young’s modulus values of the DPG particle systems increased moderately with temperature or salinity, indicating a favorable impact of reservoir conditions on the reservoir regulation abilities of DPG particles. The studies in this paper indicated that the practical reservoir regulation performances of DPGs can be improved by adjusting the mechanical strength, providing basic theoretical guidance for the application of DPGs in efficient oilfield development.

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Section: Formula Of Bulk Gelsmentioning

confidence: 99%

Probing the Effect of Young’s Modulus on the Reservoir Regulation Abilities of Dispersed Particle Gels

Wang,

Zhu,

Jiang

et al. 2023

Gels

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show abstract

“…The purpose is to change the wettability of the reservoir from oil wetting to water wetting to improve oil production (Shalbafan et al 2019). Wang et al (2019) used the Truva oil field in northern Kazakhstan as an example to comprehensively evaluate the plugging effect and oil/water selectivity of polymer microspheres (PMs) in carbonate matrix cores and fractured cores. Through scanning electron microscopy (SEM) imaging results and energy dispersive spectroscopy Prod.…”

Section: Addition Of Nanoparticlesmentioning

confidence: 99%

A review of development methods and EOR technologies for carbonate reservoirs

et al. 2020

Pet. Sci.

178

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Carbonate reservoirs worldwide are complex in structure, diverse in form, and highly heterogeneous. Based on these characteristics, the reservoir stimulation technologies and fluid flow characteristics of carbonate reservoirs are briefly described in this study. The development methods and EOR technologies of carbonate reservoirs are systematically summarized, the relevant mechanisms are analyzed, and the application status of oil fields is catalogued. The challenges in the development of carbonate reservoirs are discussed, and future research directions are explored. In the current development processes of carbonate reservoirs, water flooding and gas flooding remain the primary means but are often prone to channeling problems. Chemical flooding is an effective method of tertiary oil recovery, but the harsh formation conditions require high-performance chemical agents. The application of emerging technologies can enhance the oil recovery efficiency and environmental friendliness to a certain extent, which is welcome in hard-to-recover areas such as heavy oil reservoirs, but the economic cost is often high. In future research on EOR technologies, flow field control and flow channel plugging will be the potential directions of traditional development methods, and the application of nanoparticles will revolutionize the chemical EOR methods. On the basis of diversified reservoir stimulation, combined with a variety of modern data processing schemes, multichannel EOR technologies are being developed to realize the systematic, intelligent, and cost-effective development of carbonate reservoirs.

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“…On the basis of researchers' pioneering work [9] about flat microchannels, the application of Navier-Stokes equations is proved to be valid for this scale, as well as the negligibility of surface roughness, viscous heating and axial heat transfer. In a gesture to avoid rapid temperature increase along the flow direction, the addition of rough elements in MCHS are widely used, such as dimples [10,11], ribs and grooves [12][13][14][15], fins [16,17], and so on [18]. Among them, micro pin fin heat sink (MPFHS) draws a great deal of attention, which is normally consisted of micro channels with an array of aligned or staggered circular pin fins.…”

Section: Introductionmentioning

confidence: 99%

Hydraulic and Thermal Performance of Microchannel Heat Sink Inserted with Pin Fins

et al. 2021

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With the development of micromachining technologies, a wider use of microchannel heat sink (MCHS) is achieved in many fields, especially for cooling electronic chips. A microchannel with a width of 500 μm and a height of 500 μm is investigated through the numerical simulation method. Pin fins are arranged at an inclined angle of 0°, 30°, 45°, and 60°, when arrangement method includes in-lined pattern and staggered pattern. The effects of inclined angle and arrangement method on flow field and temperature field of MCHSs are studied when Reynolds number ranges from 10 to 300. In addition to this, quantitative analyses of hydraulic and thermal performance are also discussed in this work. With the increase of inclined angle, the variation of friction factor and Nusselt number do not follow certain rules. The best thermal performance is achieved in MCHS with in-lined fines at an inclined angle of 30° accompanied with the largest friction factor. Arrangement method of pin fins plays a less significant role compared with inclined angle from a general view, particularly in the Reynolds number range of 100 ~300.

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Evaluation of the oil/water selective plugging performance of nano-polymer microspheres in fractured carbonate reservoirs

Cited by 4 publications

References 16 publications

Probing the Effect of Young’s Modulus on the Reservoir Regulation Abilities of Dispersed Particle Gels

Probing the Effect of Young’s Modulus on the Reservoir Regulation Abilities of Dispersed Particle Gels

A review of development methods and EOR technologies for carbonate reservoirs

Hydraulic and Thermal Performance of Microchannel Heat Sink Inserted with Pin Fins

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