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

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.

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

2014 ◽  
Vol 535 ◽  
pp. 718-724
Author(s):  
Hai Yang Yu ◽  
Xiang Jun Liu ◽  
Wen Juan Ji ◽  
Hai Tao Gao ◽  
Bin Bin Xu
Keyword(s):  
Porous Media ◽  
Apparent Viscosity ◽  
Phenol Formaldehyde ◽  
Gelation Time ◽  
Phenol Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Polymer Gel ◽  
Gelation Process ◽  
Profile Control ◽  
The Relationship

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.

Gelation Performance and Microstructure Study of Chromium Gel and Phenolic Resin Gel in Bulk and Porous Media

2014 ◽  
Vol 136 (4) ◽  
Author(s):  
Jian Zhang ◽  
Hong He ◽  
Yefei Wang ◽  
Xiaoli Xu ◽  
Yuejun Zhu ◽  
...  
Keyword(s):  
Porous Media ◽  
Phenolic Resin ◽  
Cluster Structure ◽  
Gelation Time ◽  
Polymer Gel ◽  
3D Network ◽  
Shape Structure ◽  
Gelation Behavior ◽  
Gel Membranes ◽  
Off Time

Polymer gel has been widely used to control excessive water production in many mature oilfields; however, there still exist some problems concerning the differences between gelation behavior in bulk and porous media. In this paper, the gelation time and microstructures of chromium gel and phenolic resin gel in bulk and porous media were studied. Results showed that for chromium gel, the initial gelation time in porous media was about 2.5–3.5 times of that in bulk and final gelation time in porous media was about 6.0–7.0 times of that in bulk. While for phenolic resin gel, the initial gelation time in porous media was about 1.0–1.5 times of that in bulk, and final gelation time in porous media was about 1.5–2.0 times of that in bulk. The morphology of chromium gel and phenolic resin gel in bulk were dendritic shape structure and 3D network structure, respectively. However, the morphology of chromium gel and phenolic resin gel in porous media were both dense gel membranes at low magnification. While at higher magnification, compared with the branchlike cluster structure of chromium gel in porous media, the network of phenolic resin gel was more developed. The experimental results can provide the basis for determining well shut off time and reveal the differences of gel microstructures between the chromium gel and phenolic gel in bulk and porous media.

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

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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