Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/116504
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Type: Journal article
Title: Experimental study on expansion characteristics of core-shell and polymeric microspheres
Author: Diwu, P.
Jiang, B.
Hou, J.
You, Z.
Wang, J.
Sun, L.
Ju, Y.
Zhang, Y.
Liu, T.
Citation: Journal of Nanotechnology, 2018; 2018:1-9
Publisher: Hindawi
Issue Date: 2018
ISSN: 1687-9503
1687-9511
Statement of
Responsibility: 
Pengxiang Diwu, Baoyi Jiang, Jirui Hou, Zhenjiang You, Jia Wang, Liangliang Sun, Ye Ju, Yunbao Zhang and Tongjing Liu
Abstract: Traditional polymeric microsphere has several technical advantages in enhancing oil recovery. Nevertheless, its performance in some field application is unsatisfactory due to limited blockage strength. Since the last decade, novel core-shell microsphere has been developed as the next-generation profile control agent. To understand the expansion characteristic differences between these two types of microspheres, we conduct size measurement experiments on the polymeric and core-shell microspheres, respectively. The experimental results show two main differences between them. First, the core-shell microsphere exhibits a unimodal distribution, compared to multimodal distribution of the polymeric microsphere. Second, the average diameter of the core-shell microsphere increases faster than that of the polymeric microsphere in the early stage of swelling, that is, 0-3 days. These two main differences both result from the electrostatic attraction between core-shell microspheres with different hydration degrees. Based on the experimental results, the core-shell microsphere is suitable for injection in the early stage to block the near-wellbore zone, and the polymeric microsphere is suitable for subsequent injection to block the formation away from the well. A simple mathematical model is proposed for size evolution of the polymeric and core-shell microspheres.
Rights: Copyright © 2018 Pengxiang Diwu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
RMID: 0030090905
DOI: 10.1155/2018/7602982
Appears in Collections:Australian School of Petroleum publications

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