Stability, seepage and displacement characteristics of heterogeneous branched-preformed particle gels for enhanced oil recovery

Li, Jiangbo; Jiang, Zuming; Wang, Yi; Zheng, Jian; Huang, Guangsu

doi:10.1039/c7ra13152f

Cited by 25 publications

(9 citation statements)

References 28 publications

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“…Elsharafi et al [ 10 ] investigated the influence of particle size, brine concentration and gel strength on PPG blocking efficiency. By using experimental methods, Song et al [ 11 ] studied the injection characteristics, Imqam et al [ 12 ] studied the plugging performance, Saghafi et al [ 13 ] studied the retention characteristics, and Li et al [ 14 ] studied the seepage and displacement characteristics of PPG in conformance control. Zhao et al [ 15 ] investigated the restarting pressure gradient of PPG to deform and pass through pore throats.…”

Section: Introductionmentioning

confidence: 99%

Selective Penetration and Profile Control Performance of Preformed Particle Gels for Heterogeneous Oil Reservoirs

Zhou

et al. 2022

Gels

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The preformed particle gel (PPG) has been proved to be an effective chemical agent to reduce fluid channeling and increase the sweeping efficiency. However, we still lack a clear understanding of the field-scale matching relationship between PPG size, elastic modulus and a heterogeneous reservoir. In this respect, the paper carried out various sand pack displacement experiments. The results indicated that an excessively large PPG or elastic modulus would plug a low-permeability sand pack and even increase the severity of fluid channeling. On the contrary, an excessively small PPG or elastic modulus allowed a certain degree of profile control, but the PPG could easily migrate out of high-permeability sand packs with water. If the elastic modulus remained unchanged, the suitable PPG size increased as the reservoir permeability ratio increased. On the other hand, the suitable elastic modulus increased with the increase of the reservoir permeability ratio when the PPG size was kept the same. By using regression analysis, quantitative expressions were established in order to determine the best suitable PPG size for a certain heterogeneous reservoir. When the elastic modulus was fixed, the best suitable PPG mesh exhibited a linear relation with the permeability ratio. This paper provides a useful reference to select the most convenient PPG size and elastic modulus for a potential heterogeneous reservoir, suitable to enhance oil recovery.

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Section: Introductionmentioning

confidence: 99%

Selective Penetration and Profile Control Performance of Preformed Particle Gels for Heterogeneous Oil Reservoirs

Zhou

et al. 2022

Gels

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“…Regarding propagation, Imqam et al [ 13 ] studied the propagation and plugging mechanisms of PPGs in open void-space conduits with different heterogeneities. Li et al [ 14 ] analyzed the stability, seepage and displacement characteristics of a new branched PPG using sand-pack displacement experiments. Considering PPG retention, Farasat et al [ 15 ] and Saghafi et al [ 16 ] analyzed many influencing factors, including reservoir temperature, displacing-fluid velocity, PPG diameter, flow rate and the porosity of the medium.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Matched Particle Size and Elastic Modulus of Preformed Particle Gel for Oil Reservoirs

Zhou

2022

Gels

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Suitable elastic modulus and particle size of preformed particle gel are the keys to both diverting water flow and avoiding permanent impairment to reservoirs. Therefore, the paper aims at finding the best matched preformed particle gel for given reservoirs using sand-pack displacement experiments. The results show that the injection pressure of preformed particle gel with excessively small size and elastic modulus is relatively low, indicating poor capacity to increase flow resistance and reduce water channeling. On the other hand, if the particle size and elastic modulus of preformed particle gel are excessively large, the reservoir may be plugged and irreversibly damaged, affecting oil development performance. In fact, the best matched particle size and elastic modulus of preformed particle gel increase with the increase in reservoir permeability. Furthermore, the paper establishes a quantitative logarithmic model between the particle size of preformed particle gel and reservoir permeability. Finally, the established matching relationship is validated via microscopic visualization oil displacement experiments using a glass etching model. The validation experiments indicate that the preformed particle gel (60–80 mesh; 2–4 Pa) selected according to the matching relationship can effectively reduce water channeling and increase sweeping efficiency by as much as 55% compared with water flooding in the glass etching model with an average permeability of 2624 × 10−3 μm2. Therefore, the established matching relationship can provide an effective guide when selecting the best suitable preformed particle gel for a given reservoir in more future applications.

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“…The micro‐gel particle is a network of aggregated colloidal particles with soft solid‐like mechanical properties . The micro‐gel particle suspension is a kind of viscoelastic fluid, and the micro‐gel particles are cross‐linked as a porous interconnected network structure at microscale . The fact is that micro‐gel particle suspension is not always effective for all kinds of oilfields in practice due to unclearness of its transport mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…16,17 The micro-gel particle suspension is a kind of viscoelastic fluid, and the micro-gel particles are cross-linked as a porous interconnected network structure at microscale. 18 The fact is that micro-gel particle suspension is not always effective for all kinds of oilfields in practice 19,20 due to unclearness of its transport mechanism. Understanding the transport mechanism of micro-gel particle suspension in porous media is crucial for gel treatments during enhanced oil recovery.…”

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confidence: 99%

Enhanced oil recovery mechanism and recovery performance of micro‐gel particle suspensions by microfluidic experiments

Lei

Liu

Xie

et al. 2019

Energy Science & Engineering

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Micro‐gel particle suspensions (MGPS) have been proposed for enhanced oil recovery (EOR) in reservoirs with harsh conditions in recent years, yet the mechanisms are still not clear because of the complex property of MGPS and the complex geometry of rocks. In this paper, the micro‐gel particle‐based flooding has been studied by our microfluidic experiments on both bi‐permeability micromodels and reservoir‐on‐a‐chip. A method for reservoir‐on‐a‐chip design has been proposed based on QSGS (quartet structure generation set) to ensure that the flow geometry on chip owns the most important statistical features of real rock microstructures. In the micromodel experiments with heterogeneous microstructures, even if the MGPS has the same macroscopic rheology as the hydrolyzed polyacrylamides (HPAM) solution for flooding, MGPS may lead to significant fluctuations of pressure field caused by the nonuniform concentration distribution of particles. In the reservoir‐on‐a‐chip experiments, clustered oil trapped in the swept pores can be recovered by MGPS because of pressure fluctuation, which hardly happens in the HPAM flooding. Compared with the water flooding, the HPAM solution flooding leads to approximately 17% incremental oil recovery, while the MGPS results in approximately 49.8% incremental oil recovery in the laboratory.

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Stability, seepage and displacement characteristics of heterogeneous branched-preformed particle gels for enhanced oil recovery

Cited by 25 publications

References 28 publications

Selective Penetration and Profile Control Performance of Preformed Particle Gels for Heterogeneous Oil Reservoirs

Selective Penetration and Profile Control Performance of Preformed Particle Gels for Heterogeneous Oil Reservoirs

Experimental Study on Matched Particle Size and Elastic Modulus of Preformed Particle Gel for Oil Reservoirs

Enhanced oil recovery mechanism and recovery performance of micro‐gel particle suspensions by microfluidic experiments

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