Abstract
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.
| Translated title of the contribution | The effect of cations on gelation of cross-linked polymers |
|---|---|
| Original language | Chinese (Traditional) |
| Pages (from-to) | 782-788 and 802 |
| Journal | Shiyou Kantan Yu Kaifa/Petroleum Exploration and Development |
| Volume | 46 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Aug 23 2019 |
Keywords
- Cation
- Cross-linked polymer
- Gel system
- Multi-walled carbon nano-tubes
- Rheological property
- Stability
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Energy Engineering and Power Technology
- Geology