Viscoelastic properties of a high temperature cross-linked water shut-off polymeric gel

Al-Muntasheri, Ghaithan A.; Hussein, Ibnelwaleed A.; Nasr‐El‐Din, Hisham A.; Amin, Mohamed Bakr

doi:10.1016/j.petrol.2006.04.004

Cited by 116 publications

(75 citation statements)

References 13 publications

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“…At 50°C, the gelation time was 162 h; it was reduced to 45 h when the temperature was 80°C; with the temperature further increased to 90°C, the gelation time correspondingly decreased to only 30 h. A possible explanation for the reduction of the gelation time is that the increase of temperature accelerates the crosslinking reaction rate between polymer and cross-linker molecules because of the endothermic nature of the gelation reaction. 36,37 The effect of temperature on the gelation time can be represented using the modified Arrhenius Equation 26 =…”

Section: Energy and Fuelsmentioning

confidence: 99%

Gelation Study on a Hydrophobically Associating Polymer/Polyethylenimine Gel System for Water Shut-off Treatment

et al. 2015

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A gel system has been widely used in many mature oilfields for water shut-off treatment. In the present study, the hydrophobically associating polymer (HAP) was cross-linked with the polyethylenimine (PEI) to form a HAP/PEI gel system which contains 0.35 wt % HAP and 0.60 wt % PEI. Gelation behaviors of the HAP/PEI gel formed in bottle and in core were studied, respectively. Results show that the gelation behaviors of the gel system were greatly affected by the concentration of HAP and that of PEI. The addition of the sodium chloride or calcium chloride generally resulted in a decrease of the apparent viscosity and an extension of the gelation time. However, a low concentration of sodium chloride led to a slight increase of the gel viscosity in bottle due to the intensification of the hydrophobic association. The rock skeleton of the core had a great effect on the gelation behavior. Compared with the results obtained in bottle, the apparent viscosity of the HAP/PEI gel system in core was obviously reduced, and the gelation time in core was extended two times or even longer. Both the gelation times achieved in bottle and in core decreased with the increase of temperature following the relationship of Arrhenius-type. The activation energy of the HAP/PEI gel system was 41.57 kJ/mol in bottle but increased to 60.95 kJ/mol in core. Data collected from the core flowing tests present a favorable shut-off performance and a strong wash-out resistance of the HAP/PEI gel system. In addition, the in-depth flow diversion and water permeability reduction were two main mechanisms of this gel system for water shut-off treatment.

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Section: Energy and Fuelsmentioning

confidence: 99%

Gelation Study on a Hydrophobically Associating Polymer/Polyethylenimine Gel System for Water Shut-off Treatment

et al. 2015

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“…Elastic moduli (G 0 ) and viscous moduli (G 00 ) were measured to evaluate the strength and adhesion of normal and nanocomposite hydrogels [32]. The effect of nano-silica concentration on elastic moduli (G 0 ) and viscous moduli (G 00 ) of hydrogels were presented in Fig.…”

Section: Rheological Behavior Of Nanocomposite Hydrogelmentioning

confidence: 99%

Nanosilica-induced high mechanical strength of nanocomposite hydrogel for killing fluids

Sun

Lin

Dong

et al. 2015

Journal of Colloid and Interface Science

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“…[1][2][3] Their relatively low cost also contributes to the expansion of their application scale, despite the fact that many kinds of new water-plugging agents have been developed in recent years. 4 Anionic polymers, such as hydrolyzed polyacrylamide, are commonly used with crosslinkers to prepare gelling solutions or gelants.…”

Section: Introductionmentioning

confidence: 99%

Effect of a polymer on chromium(III) diffusion during gelant injection in fractured media

Bai

Xiong

et al. 2016

J of Applied Polymer Sci

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The effect of a polymer on chromium diffusion during gelant injection into fractured media was explored with a polymer/chromium(III) (Cr 31 ) gelant. The capture and barrier effects are two main affecting mechanisms of polymer molecules on the diffusion of Cr 31 , and the formation of the polymer leak-off layer is a key influencing factor. The experimental results show that when the polymer molecular weight (MW) or concentration increased, both the diffusion rate of Cr 31 and the leak-off degree of the gelant decreased sharply. This resulted in the delayed initial production and advanced final production of Cr 31. Because of the changing diffusion rate of Cr 31 and the dilution effect of brine during gelant injection, the change trends of the Cr 31 production from the fracture outlet and matrix ports reversed after the injection volume exceeded a value; this value was named the critical injected volume. During gelant injection into the fractures, under the effects of gravity action and the disproportionate diffusion of Cr 31, the chromium diffusion profiles measured at the fracture top and bottom were different. The chromium diffusion profile along the matrix varied with increasing gelant injected volume, but it finally reached the diffusion equilibrium state in the matrix. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43447.

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Viscoelastic properties of a high temperature cross-linked water shut-off polymeric gel

Cited by 116 publications

References 13 publications

Gelation Study on a Hydrophobically Associating Polymer/Polyethylenimine Gel System for Water Shut-off Treatment

Gelation Study on a Hydrophobically Associating Polymer/Polyethylenimine Gel System for Water Shut-off Treatment

Nanosilica-induced high mechanical strength of nanocomposite hydrogel for killing fluids

Effect of a polymer on chromium(III) diffusion during gelant injection in fractured media

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