Carboxylated Cellulose Nanofibrils (R-CNFs) as an Additive in Water Based Drilling Fluids (WBMs) Applied to Shale Formations

MARIA CELESTE IGLESIAS; MARÍA SOLEDAD PERESÍN; J.Y. ZHU ; DIANA ESTENOZ; YURANY ANDREA VILLADA VILLADA; NATALIA CASIS

Philadelphia

Conferencia; ACS Spring 2020 National Meeting & Expo; 2020

In this study, a sustainable alternative for the application of carboxylated cellulose nanofibrils (R-CNFs) obtained through maleic acid hydrolysis was proposed. Specifically, the use of R-CNFs as an additive in WBMs formulations as a replacement of xanthan gum (XGD) was studied. The effect of R-CNFs on the main functional properties of WBMs and their performance was evaluated and compared with the corresponding to XGD. To this end, interactions between R-CNF and bentonite (BT), as well as between R-CNF and polyanionic cellulose (PAC) were evaluated using Quartz Crystal Microbalance with Dissipation Monitoring (QCM-D) technique. The rheological analyses showed a shear-thinning behavior of WBMs containing XGD similar to WBMs with R-CNF, whilefiltration properties and thermal stability improved by the presence of R-CNF. The results obtained by QCM-D indicated higher interaction between PAC and R-CNF observed by the frequency changes. The Sisko model was used to determine the rheological parameters. On the other hand, it was found that by replacing XGD by the double concentration of R-CNF in a special WBM for Argentina shale, similar rheological properties were obtained.