Preparation, characterization, and retarding mechanism of high temperature resistant amphoteric ion polymer oil well cement retarder Poly‐AAMD for HTHP application

The amphoteric ion polymer cement retarder Poly‐AAMD was synthesized by aqueous solution polymerization, the chemical structure, molecular weight, and thermal stability was studied. As a result, the M n and M w are 1.3 × 10 4 and 4.7 × 10 4 g/mol, respectively, and the initial decomposition temperat...

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Bibliographic Details
Published in:Journal of applied polymer science 2024-01, Vol.141 (1)
Main Authors: Jinhua, Huo, Xing, Zhang, Junwei, Liu, Ruizhi, Zhang, Chenxi, Wei, Siman, Zhang, Shanjian, Li
Format: Article
Language:English
Subjects:
Amphoterics
Aqueous solutions
Cement
Compressive strength
Differential thermal analysis
High temperature
Hydration
Molecular structure
NMR
Nuclear magnetic resonance
Polymer cements
Polymers
Qualitative analysis
Retarders
Retarding
Rheological properties
Slurries
Solution polymerization
Thermal stability
Thermogravimetric analysis
Thickening
Zeta potential
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Summary:The amphoteric ion polymer cement retarder Poly‐AAMD was synthesized by aqueous solution polymerization, the chemical structure, molecular weight, and thermal stability was studied. As a result, the M n and M w are 1.3 × 10 4 and 4.7 × 10 4 g/mol, respectively, and the initial decomposition temperature is 260°C. Then, the effects of retarder Poly‐AAMD on the application performance of cement slurry, such as settlement stability, thickening time, compressive strength, and rheological properties, were investigated. Especially, the thickening time of cement slurry with 1.2 and 1.5 wt% retarder Poly‐AAMD is 312 and 316 min at 220°C, the compressive strength is larger than 14 MPa at 24 h. Compared to conventional retarders, the temperature resistance has been improved to 220°C. Simultaneously, the initial hydration process of cement slurry was studied by low field NMR based on the T 2 value. Moreover, the hydration products of cement slurry with retarder Poly‐AAMD were analyzed depends on the qualitative and quantitative analysis methods, the type and content of hydration products were confirmed by the methods of X‐ray diffraction analysis (XRD), scanning electron microscope (SEM), thermogravimetric analysis (TG), and differential thermal analysis (DTG). Finally, the retarding mechanism of retarder Poly‐AAMD was further studied depends on the results of adsorption amount and Zeta potential.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.54760