A critical review on use of polymer microgels for conformance control purposes

Abdulbaki, Mazen Ramzi; Huh, Chun; Sepehrnoori, Kamy; Delshad, Mojdeh; Varavei, Abdoljalil

doi:10.1016/j.petrol.2014.06.034

Cited by 144 publications

(78 citation statements)

References 95 publications

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“…To better exploit the potential of residual oil in low-permeable layers, researchers have developed various deep profile control techniques, such as colloidal dispersion gels (CDGs), preformed particle gels (PPGs), polymer microspheres, and inorganic gel coatings. [14][15][16][17][18][19] CDGs are a gel system that relies on intramolecular crosslinking between a polymer and crosslinking agent. 20 With the delayed crosslinking technique, CDGs can selectively enter high-permeability layers and thus effectively ease interlayer cross-flow.…”

Section: Introductionmentioning

confidence: 99%

“…3 Moreover, abundant injection water and formation water are ineffectively produced, which increases energy consumption during production, pipeline corrosion, and sewage treatment costs and causes environmental pollution. [14][15][16][17][18][19] CDGs are a gel system that relies on intramolecular crosslinking between a polymer and crosslinking agent. [6][7][8][9][10][11][12][13] However, as the reservoir structure becomes increasingly complex after entering the high-or ultrahigh-water-cut stage, the existing general profile control technology hardly meets the actual needs of reservoirs.…”

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confidence: 99%

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Migration characteristics and deep profile control mechanism of polymer microspheres in porous media

Niu

2019

Energy Science & Engineering

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The performance and migration characteristics of polymer microspheres in porous media and the mechanism of deep profile control for oil displacement were studied by theoretical analysis, instrument detection, and physical simulation to further improve oil recovery. Polymer microspheres were expansive in water and nonexpansive in oil. The polymer microspheres with short expansion times possessed excellent mechanical shear resistance. According to the matching factor (Ra), resistance factor, and residual resistance factor, the migration of polymer microspheres in porous media was divided into four periods: transportation (Ra > 2.41), bridging plugging (1 < Ra < 2.41), elastic plugging (Ra < 1), and fatigue (microsphere breakage). The resistance factor and residual resistance factor of the polymer microspheres during the bridging and elastic plugging periods were larger than those during other periods. The deep oil displacement profile can be controlled by adjusting the occurrence positions (distance from the injection end) of these two periods. Increasing the injection rate during the transportation and bridging plugging periods and decreasing the injection rate during the elastic plugging period made elastic plugging occur farther from the injection end while maintaining the resistance factor and residual resistance factor at high levels. Aimed at the remaining oil accumulation area, the optimal profile control depth of oil displacement (distance from the injection end) of polymer microspheres in porous media can be regulated by changing the injection rate to enhance oil recovery. The simultaneous migration and expansion of polymer microspheres is the main mechanism of microsphere fluid diversion in porous media.

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Migration characteristics and deep profile control mechanism of polymer microspheres in porous media

Niu

2019

Energy Science & Engineering

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“…Dentre outras adversidades, ocorrem a corrosão de tubulações, as questões ambientais, o encarecimento das operações e, em última instância, o fechamento antecipado de poços que ainda contenham volumes significativos de óleo (CHUNG et al, 2011;EL-KARSANI et al, 2014;GOUDARZI et al, 2015;ABDULBAKI et al, 2014;ZHAO et al, 2011;ALDHAHERI et al, 2016).…”

Section: Introductionunclassified

Hidrogéis Compósitos Poliméricos Com Possível Aplicação No Controle De Permeabilidade Em Reservatórios De Petróleo: Uma Revisão.

Pereira¹,

Oliveira²,

Mansur³

2019

REPECT

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No cenário energético mundial, as companhias petrolíferas exibem enormes gastos com tecnologias em busca de novas regiões para exploração de petróleo. Portanto, prolongar o tempo de operação nos reservatórios já existentes se tornou uma boa alternativa para atender a demanda de óleo e controlar as adversidades geradas pelas operações de baixa eficiência. Para isso, a técnica de controle de conformidade vem sendo muito discutida no intuito de melhorar a eficiência de varrido e diminuir a água de produção indesejada. Dentre os métodos químicos existentes, os géis poliméricos exibem a capacidade de bloquear as regiões fraturadas ou heterogêneas presentes em reservatórios com problemas de permeabilidade. No entanto, a autonomia destes hidrogéis ainda não foi completamente estabelecida por conta das drásticas condições encontradas nesses reservatórios. Neste contexto, agentes de reforço vêm sendo utilizados para a elaboração de hidrogéis poliméricos compósitos, os quais buscam melhorar as propriedades frente aos sistemas convencionais. Dentre os sistemas de reforço estão: nanosílica, argila, nanotubos de carbono, cinzas volantes de carvão, partículas de asfaltenos, nanocristais de celulose, óxido de grafeno, dentre outras. No geral, a presença destes componentes contribui de maneira semelhante, portanto deve-se considerar o custo e, principalmente, o uso de materiais ecológicos não prejudiciais ao meio-ambiente.

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“…Polyacrylamide or acrylamide copolymer crosslinked microspheres used for reducing water cut to increase oil recovery have received extensive interest. The aspects of concern include the preparation, plugging performance, profile control performance, stability, mechanism of transport in porous media and so on.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of novel pH-sensitive core−shell microspheres for enhanced oil recovery

et al. 2017

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A novel pH‐sensitive core−shell microsphere was synthesized by growing sodium acrylate as a shell on crosslinked polyacrylamide particles as the core by surface‐initiated atom transfer radical polymerization. The structures and characteristics of the microspheres were confirmed by Fourier transform infrared spectroscopy, 1H NMR spectroscopy, SEM, transmission electron microscopy and AFM. The viscosity and size of the microspheres in response to changes in pH value were also investigated. As a kind of potential profile control and flooding agent, the performances of permeability reduction and enhanced oil recovery were studied in designed experiments. © 2017 Society of Chemical Industry

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A critical review on use of polymer microgels for conformance control purposes

Cited by 144 publications

References 95 publications

Migration characteristics and deep profile control mechanism of polymer microspheres in porous media

Migration characteristics and deep profile control mechanism of polymer microspheres in porous media

Hidrogéis Compósitos Poliméricos Com Possível Aplicação No Controle De Permeabilidade Em Reservatórios De Petróleo: Uma Revisão.

Preparation and properties of novel pH-sensitive core−shell microspheres for enhanced oil recovery

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