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| Influence of amphiphilic polymer on the flowing of O/W emulsion system |
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KANG Wanli1, WEI Shaolong1, HU Leilei1, JI Yanfeng1, YANG Runmei1, LIU Shuren2,3
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(1.School of Petroleum Engineering in China University of Petroleum, Qingdao 266580, China;2.Well Testing Company, Bohai Drilling and Exploration Engineering Corporation, CNPC, Langfang 065007, China;3.Geological Resources and Geological Engineering Postdoctoral Research Station in China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| The effect mechanism of amphiphilic polymer on the seepage of O/W emulsion system was evaluated using contrast flow, atomic force microscopy, and electron microscope scanning techniques. The results indicate that when the HAPM concentration is above the critical associating concentration (wCAC), the tridimensional and strong viscoelasticity supramolecular networks are formed through intermolecular hydrophobic association due to the special structure of amphiphilic polymer grafted with hydrophobic group. The viscoelasticity of the system is enhanced by the interaction of supramolecular networks and emulsified oil droplet, which shows unstable characteristics of "crawling" for the flow resistance. It is also found that as the amphiphilic polymer molecular weight increases, the flow resistance of O/W emulsion system improves and becomes more fluctuant when the HAP concentration is above wCAC. |
| Key words: amphiphilic polymer O/W emulsion system flow "crawling" style |
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