Di-carboxylic acid cellulose nanofibril (DCA-CNF) as an additive in water-based drilling fluids (WBMs) applied to shale formations

YURANY A.VILLADA-VILLADA; MARÍA CELESTE IGLESIAS; MARÍA LAURA OLIVARES; NATALIA CASIS; JUNYONG ZHU; MARÍA SOLEDAD PERESÍN; DIANA ESTENOZ

CELLULOSE

SPRINGER

Lugar: Berlin; Año: 2020

0969-0239

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 water based drilling fluids (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 that 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, while filtration properties and thermal stability improved by the presence of R-CNF. Results obtained by QCM-D indicated higher interaction between PAC and R-CNF when compared to BT and R-CNF. 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.