Use of Cellulose Nanofibrils as Replacement of Xanthan Gum in Water Based Drilling Fluids for Argentina Shale

YURANI VILLADA; M.C. IGLESIAS; NATALIA CASÍS; ELEONORA ERDMANN; M. S. PERESIN; DIANA ESTENOZ

Conferencia; 255th ACS National Meeting, New Orleans; 2018

In this work the use of cellulose without lignin (CNF1) and cellulose with lignin (CNF2) as replacement of xantham gum (XGD) in WBMs for Argentina shale was studied. The effect of the CNFs composition on the rheological behavior and filtering properties was analyzed.The rheometric characterization of the fluids was complemented with the structural analysis and rheological model.A shear-thinning behavior with notable effect on the concentration of CNFs was observed.Also, mud rheological properties very close to the based mud were achieved forcomposition of PAC = 8.00 g/L and CNF = 3.00 g/L. Structural changes were assessed by SEM and a high particles agglomeration and a film formation due to the presence of CNF2 were observed. Additionally, results indicated that CNF1 exhibited more viscosifying characteristics in WBMs, and CNF2 improved filtration properties. The Sisko model was used to determine rheological parameters