Flow of a Cross-Linking Polymer in Porous Media

Ленченков, Н. С.; Glasbergen, Gerard; Kruijsdijk, C.P.J.W. van

doi:10.1007/s11242-018-1105-3

Cited by 7 publications

(3 citation statements)

References 33 publications

(36 reference statements)

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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: 81%

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: 81%

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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“…Field tests show that in-depth profile control can effectively block fractures and high-permeability reservoirs [19,20], and it can cause subsequently displaced fluid to flow into lowpermeability reservoirs to displace residual oil [21]. Nevertheless, in-depth profile control techniques have many problems, such as short-term validity, decreased effects of enhanced oil recovery, and scale formation from the reaction between bicarbonate radical ions in weak gels and calcium ions in strata [22]. Therefore, the enhanced oil recovery of in-depth profile control is limited.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Enhanced Oil Recovery for In-Depth Profile Control and Cyclic Waterflooding in Fractured Low-Permeability Reservoirs

Yin

Zhou

2021

Geofluids

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When fractured low-permeability reservoirs enter a high water cut period, injected water always flows along fractures, water cut speeds increase rapidly, and oil production decreases quickly in oil wells. It is difficult to further improve the oil recovery of such fractured low-permeability reservoirs. In this paper, based on the advantages of in-depth profile control and cyclic water injection, the feasibility of combining deep profile control with cyclic water injection to improve oil recovery in fractured low-permeability reservoirs during the high water cut stage was studied, and the mechanisms of in-depth profile control and cyclic waterflooding were investigated. According to the characteristics of reservoirs in Zone X, as well as the fracture features and evolution mechanisms of the well network, an outcrop plate fractured core model that considers fracture direction was developed, and core displacement experiments were carried out by using the HPAM/Cr3+ gel in-depth profile control system. The enhanced oil recovery of waterflooding, cyclic water injection, and in-depth profile control, as well as a combination of in-depth profile control and cyclic water injection, was investigated. Moreover, variations in the water cut degree, reserve recovery percentage, injection pressure, fracture and matrix pressure, and water saturation were monitored. On this basis, the mechanism of enhanced oil recovery based on the combined utilization of in-depth profile control and cyclic waterflooding methods was analyzed. The results show that in-depth profile control and cyclic water injection can be synchronized to further increase oil recovery. The recovery ratio under the combination of in-depth profile control and cyclic water injection was 1.9% higher than that under the in-depth profile control and 5.6% higher than that under cyclic water injection. The combination of in-depth profile control and cyclic water injection can increase the reservoir pressure; therefore, the fluctuation of pressure between the matrix and its fractures increases, more crude oil flows into the fracture, and the oil production increases.

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“…Many scholars have studied the mechanism of crosslinked polymer flooding (Shriwal and Lane, 2012;Brattekas et al, 2015;Lenchenkov et al, 2018). Himes et al (1994) developed a new, environmentally friendly polymer for the well completion and stimulation treatments where a premium is placed on maximizing effectiveness while minimizing formation damage.…”

Section: Introductionmentioning

confidence: 99%

Injection parameters optimization of crosslinked polymer flooding by genetic algorithm

Lian

Duan

2018

Adv. Geo-Energy Res.

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The crosslinked polymer flooding, which is developed on the basis of polymer flooding, is a new type of flooding technology. As an EOR method, cross-linked polymer flooding has become a research hotspot. In the process of cross-linked polymer flooding, if the concentrations of the polymer and the crosslinking agent are small, the viscosity of the solution is low, and it will not achieve the oil displacement effect. Meanwhile, if the concentrations of the polymer and crosslinking agent are large, the viscosity of the solution is high, it needs high pressure to drive it flowing in the formation. Further, with the increasing injection of chemical agents, the contradiction between reduced production and increased cost has presented. The performance of crosslinked polymer flooding depends on the interaction of these two factors. Therefore, the concentrations of polymer and crosslinking agent should be optimized. In this paper, an optimal design method is proposed by using genetic algorithm with global optimization characteristics algorithm, combining with the chemical flooding numerical simulation software UTCHEM, the concentrations of the chemical agents are optimized. Firstly, the cumulative oil production is calculated by numerical simulation software UTCHEM, then the concentrations of the chemical agents are randomly generated by the genetic algorithm in the encoding process, and the fitness function takes the profit of cross-linked polymer flooding. Given a set of initial values, through crossover and mutation of population, optimized injection concentrations of the polymer and cross-linking agent are obtained by the multi-generational calculation.

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Flow of a Cross-Linking Polymer in Porous Media

Cited by 7 publications

References 33 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

Mechanism of Enhanced Oil Recovery for In-Depth Profile Control and Cyclic Waterflooding in Fractured Low-Permeability Reservoirs

Injection parameters optimization of crosslinked polymer flooding by genetic algorithm

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