Water level and mobilisation of colloids in porous media

Chequer, Larissa; Bedrikovetsky, Pavel; Badalyan, Alexander; Gitis, Vitaly

doi:10.1016/j.advwatres.2020.103670

Cited by 18 publications

(6 citation statements)

References 77 publications

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“…Mohtar et al [22] studied the post-grouting stability of bentonite in porous media and established the relationship between the yield stress of the bentonite suspension and the critical water conductivity. Bedrikovetskya et al [23] and Lenchenkov et al [24] studied the flow of colloids in water and porous media, and confirmed the validity of their proposed model, which can also be used to predict potential well plugging. Civan and Vafai [25] examined the characteristic features of the fundamental flow mechanisms and discussed the essential parameters of relevant modeling approaches for the transportation of gas through dense, porous media.…”

Section: Introductionmentioning

confidence: 83%

Influence of the Aggregate-Pouring Sequence on the Efficiency of Plugging Inundated Tunnels through Drilling Ground Boreholes

Jiang

Hui

Sui

et al. 2020

Water

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This paper presents an experimental and field investigation on the efficiency of plugging by pouring aggregate in different sequences through multiple boreholes in a tunnel with flowing water. There have been controversies surrounding the selection of the pouring order for different particle sizes of aggregates and the order in different boreholes. A visualized experimental setup is used to investigate the influence of the pouring orders on the efficiency of plugging through multiple boreholes under the flowing-water condition. A case study of the salvage of a flooded mine using ground directional boreholes was investigated and compared with the experimental results. The water-pressure difference at the aggregate-capping moment, when fine aggregate was poured first and coarse aggregate later, was relatively small, compared to that when fine aggregate was poured upstream and coarse aggregate, downstream. The result implies that the efficiency of plugging with the order of pouring fine aggregate first and coarse aggregate later in different boreholes is better than that with the order of pouring fine aggregate upstream and coarse aggregate downstream. When the poured aggregate is about to be capped, increasing the pouring intensity with the same or a larger particle size is more conducive to capping. The case study shows that pouring fine materials in the early stage reduced the cross-sectional area; in the later stage, the aggregate particle size was gradually increased, which can be helpful in forming an effective water-barrier section in the tunnel. The pouring of aggregate provided a base for cement grouting to form a water-plug section with a length of 106 m, resulting in a sealing efficiency of 100% for the case.

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Section: Introductionmentioning

confidence: 83%

Influence of the Aggregate-Pouring Sequence on the Efficiency of Plugging Inundated Tunnels through Drilling Ground Boreholes

Jiang

Hui

Sui

et al. 2020

Water

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“…In fact, in this situation, the hydrodynamic effect on the SP particles was significantly enhanced, so more large SP particles passed through the pore channels of the porous media and advanced to a distant position but were eventually gradually deposited as the transport distance increased. This phenomenon indicates that bed filtration has a remarkable action on the deposition process of large SP particles [23,47,51], which should be considered when dealing with the transport of widely graded SPs in practical engineering projects. In other words, the number of copper ions adsorbed on the graded large-scale SP was limited compared to that on the graded small-scale SP, while most of the copper ions were present in water-soluble form.…”

Section: Pgcs Of Sps At Differentmentioning

confidence: 96%

The Promotion/Inhibition of the Seepage Transport of Copper Ions by Suspension-Colloidal Particles with Wide Size Gradation

Nie

Yang³

et al. 2021

Geofluids

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Sand column tests were conducted to investigate the seepage transport of silicon powders (SPs) with two wide particle size ranges (30-2000 nm and 2-70 μm), including the cotransport of SPs and copper ions. The results show that the graded large-scale SP has an obvious inhibiting influence on the transport of copper ions. In contrast, in the presence of the graded small-scale SP, the concentration of copper ions in the effluent tends to increase; i.e., there appears to be a promoting effect. However, after a long transport distance, the presence of SPs, regardless of particle size, has an overall retarding effect on heavy metal pollutants (e.g., copper ions). The promoting effect of the increase in seepage velocity on the concentration of copper ions in the effluent is greater with the graded large-scale SPs than with the graded small-scale SPs. In terms of the microstructural characteristics by metallographic microscopy, the average particle size of the deposited graded small-scale SPs is almost constant at different transport distances, while that of the deposited graded large-scale SPs tend to decrease significantly with increasing transport distance; i.e., notable bed filtration is exhibited in the latter case. This physical mechanism also determines the sequence and rate of the retarding effect of SPs on heavy metal ions under seepage flow.

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“…These conditions highlight the importance of the oil-water meniscus, which could play a vital role both in particle detachment and transport. The capillary force exerted by the meniscus on attached particles has been shown to greatly exceed both the electrostatic and drag forces [26]. In this case, modelling formation damage due to fines migration would require explicit modelling of the oil-water interface, as determined by the equations of transport of the separating surface during two-phase flow [12,13].…”

Section: Incorporating More Complex Reservoir Physicsmentioning

confidence: 99%

“…The maximum retention function for single-phase flow, where fines are detached by drag, depends on velocity. For two-phase flow, when both phases are mobile, the force exerted by the fluid-fluid interface dominates over the drag and attaching electrostatic force [26], resulting in negligible velocity dependence and an MRF that is primarily a function of saturation. In this paper, we discuss an "intermediate" case of oil flow under the presence of connate water.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Oil Production Data under Fines Migration and Productivity Decline

et al. 2023

Self Cite

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Fines migration is a common cause of permeability and, consequently, injectivity and productivity decline in subterranean reservoirs. Many practitioners implement prevention or remediation strategies to reduce the impact of fines migration on field productivity and injectivity. These efforts rely on careful modelling of the underlying physical processes. Existing works have demonstrated the ability to predict productivity decline by quantifying the extent of particle decline at different fluid velocities. Fluid flows in porous media often involve multiple phases, which has been shown in laboratory experiments to influence the extent of particle detachment. However, no theory has directly accounted for this in a particle detachment model. In this work, a new model for fine particle detachment, expressed through the critical retention function, is presented, explicitly accounting for the immobile fines trapped within the irreducible water phase. The new model utilises the pore size distribution to allow for the prediction of particle detachment at different velocities. Further, an analytical model is presented for fines migration during radial flow into a production well. The model accounts for single-phase production in the presence of irreducible water, which has been shown to affect the extent of fines migration significantly. Combining these two models allows for the revealing of the effects of connate water saturation on well impedance (skin factor growth) under fines migration. It is shown that the higher the connate water saturation, the less the effect of fines migration. The appropriateness of the model for analyzing production well data is verified by the successful matching of 10 field cases. The model presented in this study is an effective tool for predicting the rate of skin growth, its stabilization time and final value, as well as the areal distribution of strained particles, allowing for more intelligent well remediation design. Further, the findings of this study can help for a better understanding of the distribution of fines within porous media and how their detachment might be influenced by pore structure and the presence of a secondary immobile phase.

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Water level and mobilisation of colloids in porous media

Cited by 18 publications

References 77 publications

Influence of the Aggregate-Pouring Sequence on the Efficiency of Plugging Inundated Tunnels through Drilling Ground Boreholes

Influence of the Aggregate-Pouring Sequence on the Efficiency of Plugging Inundated Tunnels through Drilling Ground Boreholes

The Promotion/Inhibition of the Seepage Transport of Copper Ions by Suspension-Colloidal Particles with Wide Size Gradation

Treatment of Oil Production Data under Fines Migration and Productivity Decline

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