Kinetic behavior in self-assembly process of associative polymer solutions |
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| Authors: | Jian-Xin Liu Tian-Jie Peng Ke-Quan Meng He Wang Zhong-Cong Zhao Li-Qiang Wang |
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| Institution: | 1. Key Laboratory of Exploration Technologies for Oil and Gas Resources, Ministry of Education, Yangtze University, Wuhan, China;2. Petroleum Engineering College of Yangtze University, Wuhan, Chinaliujianxin925@hotmail.com;4. Petroleum Engineering College of Yangtze University, Wuhan, China;5. CNOOC Energy Technology &6. Services-Oilfield Engineering Research Institute, Tianjin, China;7. The Geological Grigade of No.4 Oil Production Co. of Daqing Oilfield Co. Ltd, Daqing, China;8. Petroleum Engineering College of Yangtze University, Wuhan, China;9. China University of Petroleum (Beijing), Karamay Campus, Petroleum Engineering College, Karamay, China |
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| Abstract: | Using associative polymers with different micro-block length (NH), their kinetic behaviors in the self-assembly process have been discussed with steady flow, step shear rate and dynamic light scattering (DLS) experiments. The results showed that the NH is the most important parameter to affect rheology of associative polymers, and the equilibrium time and viscosity recovery are an obvious difference from seconds to hours after violent pre-shearing. With DLS data, the hydrophobic micro-zone size is always a polydispersion distribution, and gradually concentrated three scales of size, the associative polymers with higher NH values have a longer time to reach equilibrium state. The kinetic behavior of associative polymers has a greater potential to apply in enhanced oil recovery (EOR) field, we conclude that the polymers with medium associative strength have a smaller shear thinning index and higher viscosity recovery, and may satisfy the polymer flooding requirements of displacement efficiency and injectivity. |
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| Keywords: | Associative polymer aggregate self-assemble micro-block length kinetic behavior |
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