Effect of Dynamic Gelation of Polymer Gel in Porous Media: Permeability

Polymer gel is widely used in water shut-off and profile control. For success of conformance treatment, it is very important to study the dynamic gelation process of polymer gel, especially in porous media. Based on the systems of HPAM/ phenol formaldehyde resin (PFR), the dynamic gelation process in porous media was studied in an unconsolidated sandpack of the circulating device. The results showed that dynamic gelation time was much longer than static gelation time in ampoule bottle and porous media. With permeability increasing or injected speed decreasing, the dynamic initial gelation time increased but the dynamic initial gelation time varied unconspicuously. In dynamic gelation process, the system of HPAM/ PFR could be injected into in-depth of reservoir more easily. The relationship between permeability and apparent viscosity was in accordance with equation y=a (1-e-bx). The apparent viscosity after dynamic gelation was in contrast with linear velocity of b.

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Dynamic and static gelation behavior of phenol formaldehyde resin gel system in ampoule bottles and porous media

Oil & Gas Science and Technology – Revue d’IFP Energies nouvelles ◽

10.2516/ogst/2020055 ◽

2020 ◽

Vol 75 ◽

pp. 55

Author(s):

Haiyang Yu ◽

Wenjuan Ji ◽

Jiapeng Zheng

Keyword(s):

Porous Media ◽

Phenol Formaldehyde ◽

Gelation Time ◽

Quantitative Relationship ◽

Phenol Formaldehyde Resin ◽

Formaldehyde Resin ◽

Polymer Gel ◽

Gel Treatment ◽

Key Factor ◽

Gelation Behavior

The dynamic and static gelation process in porous media of the phenol formaldehyde resin gel was studied for successful application in conformance control and water shutoff. Shear rate was the most important factor affecting the dynamic gelation in porous media. Compare to static gelation in ampoule bottles and in porous media, the dynamic gelation time in porous media was extended by 2–6 times. The ability of migration and plugging after dynamic gelation was controlled by system concentration. The porous media permeability was the key factor for dynamic gelling time and strength. The quantitative relationship equation was established between dynamic gelling strength and permeability to choose the appropriate permeability for polymer gel treatment.

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Purification of water contaminated with heavy metals by example of lead as promising material based on graphene nanostructures

Perspektivnye Materialy ◽

10.30791/1028-978x-2020-9-34-43 ◽

2020 ◽

pp. 34-43

Author(s):

N. R. Memetov ◽

◽

A. V. Gerasimova ◽

A. E. Kucherova ◽

◽

...

Keyword(s):

Adsorption Process ◽

Phenol Formaldehyde ◽

Phenol Formaldehyde Resin ◽

Formaldehyde Resin ◽

Parameter Estimates ◽

Maximum Adsorption Capacity ◽

Ecological Situation ◽

Characteristic Parameters ◽

Purification Of Water ◽

Graphene Nanostructures

The paper evaluates the effectiveness of the use of graphene nanostructures in the purification of lead (II) ions to improve the ecological situation of water bodies. The mechanisms and characteristic parameters of the adsorption process were analyzed using empirical models of isotherms at temperatures of 298, 303, 313 and 323 K, which correspond to the following order (based on the correlation coefficient): Langmuir (0.99) > Temkin (0.97) > Dubinin – Radushkevich (0.90). The maximum adsorption capacity of the material corresponds to the range from 230 to 260 mg/g. We research the equilibrium at the level of thermodynamic parameter estimates, which indicates the spontaneity of the process, the endothermic nature and structure change of graphene modified with phenol-formaldehyde resin during the adsorption of lead (II) ions, leading to an increase in the disorder of the system.

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