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Erschienen in: Cellulose 12/2022

01.07.2022 | Original Research

Carboxylated cellulose nanocrystals as environmental-friendly and multi-functional additives for bentonite water-based drilling fluids under high-temperature conditions

verfasst von: Xinliang Li, Kai Wang, Liyuan Xian, Yaoli Su

Erschienen in: Cellulose | Ausgabe 12/2022

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Abstract

During the oil and gas drilling engineering, the selection of drilling fluids must take account of the technical and environmental factors. This study investigated the effectiveness of carboxylated cellulose nanocrystals (denoted as CNCs) as environmentally friendly additives for improving the rheological, filtration, and inhibitive properties of water-based drilling fluids (WBDFs). CNCs used in this study were modified by carboxylation reaction, displaying small size, negative surface charge, good colloidal stability, and prominent shear-thinning behavior. Experimental results indicated that BT/CNC suspensions had superior rheological properties, low fluid loss volumes, and effective inhibition, even at 140 °C. Microstructure analysis demonstrated that CNCs could attach to the surface of BT via hydrogen bond and ionic bond. CNCs, BT, and vicinal water molecules could form a stiff gel network, which had a strong resistance to flow under shear force, leading to a significant improvement in the rheological properties. Moreover, under the differential pressure, BT/CNC suspensions formed thin and less hydrophilic filter cakes with compact layered structure, thereby efficiently decreasing the fluid loss volume. Finally, due to the gel network and filtration ability, BT/CNC suspensions performed low water activity, which was beneficial for preventing the penetration of free water into the shales and borehole well. Thus, CNCs also exerted satisfactory inhibition on hydration and dispersion of BT and shales. As a result, CNCs showed great potential to be used as efficient, multi-functional, and environmentally friendly additives in WBDFs.

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Literatur
Zurück zum Zitat Attia M, Elsorafy W, D'Angelo S (2010) New engineered approach to replace oil-based drilling fluids with high performance water-based drilling fluids in mediterranean sea. In: North Africa technical conference & exhibition, SPE 127826. https://doi.org/10.2118/127826-MS Attia M, Elsorafy W, D'Angelo S (2010) New engineered approach to replace oil-based drilling fluids with high performance water-based drilling fluids in mediterranean sea. In: North Africa technical conference & exhibition, SPE 127826. https://​doi.​org/​10.​2118/​127826-MS
Zurück zum Zitat Chegny SJ, Tahmasbi K, Arsanjani N (2008) The possibility of replacing obms with emulsified glycol mud systems in drilling low-pressure zones of iranian oilfields. In: IADC/SPE Asia Pacific drilling technology conference, 114067. https://doi.org/10.2118/114067-MS Chegny SJ, Tahmasbi K, Arsanjani N (2008) The possibility of replacing obms with emulsified glycol mud systems in drilling low-pressure zones of iranian oilfields. In: IADC/SPE Asia Pacific drilling technology conference, 114067. https://​doi.​org/​10.​2118/​114067-MS
Metadaten
Titel
Carboxylated cellulose nanocrystals as environmental-friendly and multi-functional additives for bentonite water-based drilling fluids under high-temperature conditions
verfasst von
Xinliang Li
Kai Wang
Liyuan Xian
Yaoli Su
Publikationsdatum
01.07.2022
Verlag
Springer Netherlands
Erschienen in
Cellulose / Ausgabe 12/2022
Print ISSN: 0969-0239
Elektronische ISSN: 1572-882X
DOI
https://doi.org/10.1007/s10570-022-04676-6

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