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Thermally stable gel particles with optimized performance for high-temperature conformance control.

Qiming Zheng1, Chenming Peng2, Wei Qian2

  • 1School of Earth Sciences and Resources, China University of Geosciences, Beijing, 100083, China. zhengqimingcug@outlook.com.

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|December 14, 2025
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Summary

A new dual-crosslinking gel particle system (DPAG) offers superior high-temperature resistance for oilfield conformance control. DPAG enhances plugging efficiency and oil recovery in challenging reservoir conditions.

Keywords:
Conformance controlGel particlesThermal stability

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Area of Science:

  • Petroleum Engineering
  • Materials Science
  • Polymer Chemistry

Background:

  • Conventional conformance control systems face thermal degradation and instability in high-temperature reservoirs.
  • Existing polymer gels and foam technologies exhibit limitations under extreme thermal stress.
  • There is a critical need for robust materials for effective conformance control in challenging oilfield environments.

Purpose of the Study:

  • To develop and evaluate a novel high-temperature-resistant gel particle system, designated DPAG, for conformance control in high-temperature reservoirs.
  • To synthesize DPAG gel particles with enhanced thermal stability and mechanical properties.
  • To assess the performance of DPAG in terms of injectivity, plugging efficiency, and oil recovery enhancement.

Main Methods:

  • DPAG gel particles were synthesized using inverse emulsion polymerization with thermally stable monomers (AMPS and DAC).
  • Characterization included chemical structure assessment, particle size measurement, and microscopic morphology examination.
  • Performance evaluation involved thermodynamic stability analysis, rheological characterization, swelling kinetic studies, and core flooding experiments.

Main Results:

  • DPAG gel particles exhibited uniform size distribution and well-defined morphology.
  • Enhanced structural integrity, thermal resistance, and mechanical strength were observed compared to conventional AM gel particles.
  • DPAG dispersions (0.1%-0.5%) achieved up to 98.7% plugging efficiency and enhanced oil recovery by 22.4% with excellent injectivity and stability.

Conclusions:

  • DPAG gel particles demonstrate significant potential for effective well conformance control in high-temperature oilfields.
  • The dual-crosslinking network provides superior stability and performance under harsh reservoir conditions.
  • DPAG offers a promising solution for improving oil recovery and operational efficiency in challenging environments.