التفاصيل البيبلوغرافية
| العنوان: |
H2S-responsive zwitterionic hydrogel as a self–healing agent for plugging microcracks in oil-well cement. |
| المؤلفون: |
Huang, Xiaona, Zhang, Hao, Wang, Xuguang, Yang, Xiutian, Lin, Rongzhuang, Zhang, Fan, Liu, Ying, Xu, Kun, Zhou, Chao, Wang, Pixin |
| المصدر: |
Journal of Industrial & Engineering Chemistry; Nov2023, Vol. 127, p523-532, 10p |
| مصطلحات موضوعية: |
SELF-healing materials, CEMENT slurry, MICROCRACKS, CHEMICAL processes, CEMENT, SOLUTION (Chemistry) |
| مستخلص: |
[Display omitted] During cementing construction, H 2 S gas leak from micro-cracks of cement ring or cementing interface, seriously damaging wellbore integrity and shortening the life of wells. Therefore, microcrack self-healing cement technology is of great significance for oil wells to maintain the durability of cement rings and adapt to complex underground environments. Herein, acrylamide (AM), acrylonitrile (AN) and N-vinylformamide (NVF) were used as functional monomers, and laponite was added to prepare Laponite-poly(acrylamide-acrylonitrile-n-vinylformamide) nanocomposite hydrogel (L-PMAN) with excellent mechanical strength as micro-crack repair agent for gas-triggered cementing cement sheath. Considering the difference of chemical environment in the process of wellbore cement slurry sealing and subsequent micro-fracture plugging, different structural units were selected to design amphoteric structure. The construction of zwitterionic structure makes it exhibit excellent swelling behavior in salt solution while maintaining 80% of the original mechanical strength. More importantly, after adding L-PMAN powder,cement stone (C 1) can achieve good repair of microcracks under the trigger of H 2 S within 3 days, and the maximum gas breakthrough pressure can reach 2.5 MPa, indicating the great potentials of the L-PMAN for plugging microcracks in cement sheath. [ABSTRACT FROM AUTHOR] |
|
Copyright of Journal of Industrial & Engineering Chemistry is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Supplemental Index |
