Meng Yu This email address is being protected from spambots. You need JavaScript enabled to view it.1, Xiang Li1, Wenhui Liu1, Leilei Tie1, Guorui Xu1, Bao Wu1, Zhuoqi Chen1, and Yufei Zheng1
1R & D Center, Oilfield Production Optimization, China Oilfield Services Limited, CNOOC Tianjin PR China 300459
Received: November 25, 2021 Accepted: April 30, 2022 Publication Date: July 20, 2022
Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.
This study explored potential applications of a mixtures of nanoparticles and wormlike micelles as a chemical flooding agent in a specific Bohai Bay Oilfield. Sample preparations were carried out, based on two different zwitterionic surfactants cetylamidopropyl hydroxypropyl sulfobetaine and tetradecyl propyl sulfobetaine. A wormlike micelle which can significantly improve the viscosity in simulatated injected water was prepared, and a nanoparticle wormlike micelle was formed by directly introducing nano silica solid. The results of transmission electron microscope showed that the formation of long cetylamidopropyl hydroxypropyl sulfobetaine/tetradecyl propyl sulfobetaine composite wormlike micelles endowed the water phase with high viscosity. By adjusting the amount of surfactant in the range of 0.2 ∼ 0.5 wt%, the water phase viscosity can be controlled between 10 50 mPa·s. This work provided insights either in developing a new high-efficiency oil displacement agent, or offering a new idea for the rheological study on wormlike micelle agents.
Keywords: Oil displacement; Wormlike micelle; Nanoparticle; Rheological properties; Chemical flooding
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