Host-Guest recognition strengthened supramolecular preformed particle gel for conformance control in low-permeability fractured reservoirs
Li Z. Hao J. Lu Y. Yu Z. Yang H. Zhou B. Jiang H. Sarsenbekuly B. Kang W.
15 October 2024Elsevier B.V.
Journal of Molecular Liquids
2024#412
The conventional preformed particle gels (PPG) have problems of irreversibly shear-breakage after shearing actions during the application for conformance control in low-permeability fractured reservoirs. Herein, a novel host–guest recognition strengthened supramolecular PPG (S-PPG) was synthesized with synergistically non-covalent and covalent crosslinking structures, using host (allyl β-CD) and guest (cetyldimethylallyl ammonium chloride) monomers. Firstly, the chemical structures and micro-morphologies of S-PPG were systematically characterized by FTIR, Cryo-SEM, EDS and AFM methods. Then, the dispersion and thermal stability, swelling properties and rheological properties, including viscoelasticity, creep-recovery and shear self-healing abilities, of S-PPG were investigated, respectively. Finally, the low-permeability cores with fractures were used to identify the injectivity and plugging properties of S-PPG and conventional PPG. The results showed that the S-PPG exhibited strong crosslinking network, high dispersion and thermal stability. In addition, the S-PPG also displayed better swelling, viscoelasticity, creep-recovery and shear self-healing ability after equilibrated swelling process compared to those of conventional PPG. Finally, the S-PPG exhibited considerable compatibility with low-permeability cores with fracture width of 0.05 mm, and produced higher plugging rate (93.53 %) than conventional PPG (86.35 %). Therefore, the newly formulated supramolecular preformed particle gel (S-PPG) containing host–guest recognition can provide a new approach for solving the problems of irreversibly shear-breakage and improving the conformance control performance of PPG in low-permeability fractured reservoirs.
Host-guest recognition , Low-permeability fractured reservoir , Preformed particle gel (PPG) , Self-healing , Supramolecular interaction
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State Key Laboratory of Coking Coal Resources Green Exploitation, China University of Mining and Technology, Xuzhou, 221116, China
School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, 266580, China
Chang Qing Oil Field Company The Third Oil Extraction Factory, Yinchuan, 750005, China
Exploration and Development, Research Institute of Petrochina Changqing Oilfield Company, Xian, 710018, China
The Ninth Oil Production Plant of PetroChina Changqing Oilfield Company, Yinchuan, 750005, China
Kazakh-British Technical University, Almaty, 050000, Kazakhstan
State Key Laboratory of Coking Coal Resources Green Exploitation
School of Petroleum Engineering
Chang Qing Oil Field Company The Third Oil Extraction Factory
Exploration and Development
The Ninth Oil Production Plant of PetroChina Changqing Oilfield Company
Kazakh-British Technical University
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