The effect of cations on gelation of cross-linked polymers

被引：0
|
作者：
Sedaghatzadeh M. [1 ]
Shahbazi K. [2 ]
Pourafshary P. [3 ]
Razavi S.A. [2 ]
机构：
[1] National Iranian Drilling Company, Ahvaz
[2] Petroleum University of Technology, Abadan
[3] School of Mining and Geosciences, Nazarbayev University, Astana
来源：
Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development | 2019年 / 46卷 / 04期
关键词：
Cation; Cross-linked polymer; Gel system; Multi-walled carbon nano-tubes; Rheological property; Stability;
D O I：
10.11698/PED.2019.04.18
中图分类号：
学科分类号：
摘要：
The effects of different cation concentrations and types on rheological property and stability of Guar, Xanthan, and Partially Hydrolyzed Polyacrylamide (HPAM) cross-linked gels were analyzed through experiments. Also, a new approach was developed to reduce the negative effects of cation by application of multi-walled carbon nano-tubes (MWCNTs). The presence of cations in cross-linked gel system will reduce the viscosity of gel, the higher the cation concentration is, the lower the viscosity will be. The bivalent cation has a greater viscosity reduction effect on gel than monovalent cation. The stability of cross-linked gels is worse with cations, this situation becomes more serious under higher salinity. MWCNTs were added to HPAM gel, cross-linked by (3-Aminopropyl) triethoxysilane (APTES), they surrounded cations and removed them from polymers and reduced the reaction possibility. This method enhances the viscosity and breakdown pressure of cross-linked gels, improves the stability of HPAM cross-linked gel under different operating conditions, and can be applied to related drilling projects. © 2019, The Editorial Board of Petroleum Exploration and Development. All right reserved.
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页码：782 / 788and802
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