What does this research mean for the field?

A novel Cobalt(II)-crosslinked polymer gel system exhibits tunable delayed gelation, exceptional long-term thermal stability at 130 °C, and a unique thermoreversible sol-gel transition, making it highly effective for water control in high-temperature reservoirs. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

This work aims to evaluate a cobalt(II)-crosslinked polymer gel system for effective water control in high-temperature oil reservoirs.

July 30, 2026ProcessesOpen Access

Laboratory Evaluation of Cobalt(II)/Polyacrylamide Gels with Thermoreversible Sol–Gel Transition for Water Control in High-Temperature Reservoirs

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Authors

XZXiaosong Zhou XLXiaohui Li SDShenghui Deng

Discussion

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Overview

Randomized trial demonstrates effective water control in high-temperature reservoirs, suggesting a novel polymer solution.

Key Points

This work aims to evaluate a cobalt(II)-crosslinked polymer gel system for effective water control in high-temperature oil reservoirs.
Systematic evaluation of Co(II) concentration, polymer type, temperature, salinity, and pH on gel properties.
Comparison of gelation times and stability with conventional Cr(III)-crosslinked gels.
Investigation of thermoreversible sol-gel transition behavior at varying temperatures.
Co(II)-crosslinked gels show a gelation time of up to 16 days at 130 °C with AMPS-rich polymers.
The SAV-28/Co(II) gel system forms a stable gel at 130 °C that reverts to a low-viscosity solution between 80–85 °C.
SAV-10/Co(II) maintains high thermal stability with no gel volume loss after 100 days in high-temperature conditions.

Cite This Study

Zhou et al. (2026) studied this question.

synapsesocial.com/papers/6a6af59760e2b924d3ea22c7 https://doi.org/10.3390/pr14152435

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July 30, 2026ProcessesOpen Access

Laboratory Evaluation of Cobalt(II)/Polyacrylamide Gels with Thermoreversible Sol–Gel Transition for Water Control in High-Temperature Reservoirs

View Full Paper

Ask AI

Bookmark

Authors

XZXiaosong Zhou XLXiaohui Li SDShenghui Deng

Discussion

Member takes

Overview

Randomized trial demonstrates effective water control in high-temperature reservoirs, suggesting a novel polymer solution.

Key Points

This work aims to evaluate a cobalt(II)-crosslinked polymer gel system for effective water control in high-temperature oil reservoirs.
Systematic evaluation of Co(II) concentration, polymer type, temperature, salinity, and pH on gel properties.
Comparison of gelation times and stability with conventional Cr(III)-crosslinked gels.
Investigation of thermoreversible sol-gel transition behavior at varying temperatures.
Co(II)-crosslinked gels show a gelation time of up to 16 days at 130 °C with AMPS-rich polymers.
The SAV-28/Co(II) gel system forms a stable gel at 130 °C that reverts to a low-viscosity solution between 80–85 °C.
SAV-10/Co(II) maintains high thermal stability with no gel volume loss after 100 days in high-temperature conditions.

Cite This Study

Zhou et al. (2026) studied this question.

synapsesocial.com/papers/6a6af59760e2b924d3ea22c7 https://doi.org/10.3390/pr14152435

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