Development and Gelation Mechanism of Ultra-High-Temperature-Resistant Polymer Gel

To expand the applicability of gel fracturing fluids in ultra-high-temperature reservoirs, a temperature-resistant polymer was synthesized using the solution polymerization method. Subsequently, an ultra-high-temperature-resistant polymer gel was formulated by incorporating an organic zirconium cros...

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Published inGels Vol. 9; no. 9; p. 726
Main Authors Ma, Zhenfeng, Zhao, Mingwei, Yang, Ziteng, Wang, Xiangyu, Dai, Caili
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.09.2023
MDPI
Subjects
Analysis
Carbon
Chemical bonds
Crosslinking
Damage
Fracturing
Gelation
gelation mechanism
High temperature
Oil and gas exploration
Oil recovery
Petroleum mining
Physical properties
polymer gel
Polymer gels
Polymer industry
Polymers
R&D
Research & development
Reservoirs
rheology property
Shear properties
Shear rate
Shear strength
Solution polymerization
Spectrum analysis
Temperature
ultra-high-temperature-resistant
Viscoelasticity
Viscosity
Zirconium
China
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Summary:To expand the applicability of gel fracturing fluids in ultra-high-temperature reservoirs, a temperature-resistant polymer was synthesized using the solution polymerization method. Subsequently, an ultra-high-temperature-resistant polymer gel was formulated by incorporating an organic zirconium crosslinking agent. A comprehensive investigation was carried out to systematically study and evaluate the steady shear property, dynamic viscoelasticity, and temperature and shear resistance performance, as well as the core damage characteristics of the polymer gel. The obtained results demonstrate that the viscosity remained at 147 mPa·s at a temperature of 200 °C with a shear rate of 170 s−1. Compared with the significant 30.9% average core damage rate observed in the guanidine gum fracturing fluid, the core damage attributed to the polymer gel was substantially mitigated, measuring only 16.6%. Finally, the gelation mechanism of the polymer gel was scrutinized in conjunction with microscopic morphology analysis. We expect that this study will not only contribute to the effective development of deep and ultradeep oil and gas reservoirs but also furnish a theoretical foundation for practical field applications.
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ISSN:2310-2861
2310-2861
DOI:10.3390/gels9090726