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Nano-SiO2 Grafted with Temperature-Sensitive Polymer as Plugging Agent for Water-Based Drilling Fluids.
- Source :
-
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ) . Jul2023, Vol. 48 Issue 7, p9401-9411. 11p. - Publication Year :
- 2023
-
Abstract
- Combining smart polymers and nano-silica is an effective method to prevent free water intrusion into micro-nanopores of shale, maintaining the wellbore stability in the drilling process. A core–shell structure nano-plugging agent (NPA) for water-based drilling fluid was synthesized through modifying nano-SiO2 by using N-isopropylacrylamide, 2-acrylamide-2-methylpropane-sulfonic acid and KH-570. The structure and properties of NPA were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, particle size distribution, and transmission electron microscopy methods. Results show that NPA presents a good thermal stability with the decomposition temperature of 370 °C. The median particle size of NPA is 193 nm. The results of the pressure transfer experiments indicate that NPA presents a good sealing performance. The permeability of the cores after NPA sealing was significantly reduced to 0.031 × 10–7 μm2. After reaching the response temperature, the wetting angle of the shale surface treated by NPA is 77.22°. After aging at 150 °C for 16 h, the FLHTHP of the water-based drilling fluid system was controlled within 5 mL. NPA can enhance wellbore stability and effectively reduce the leakage of the drilling fluid during drilling process. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 2193567X
- Volume :
- 48
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. )
- Publication Type :
- Academic Journal
- Accession number :
- 164420473
- Full Text :
- https://doi.org/10.1007/s13369-022-07486-x