On the Use of Espina Corona Gum As an Eco-Friendly Polymeric Additive in Water-Based Drilling Fluids

VILLADA, YURANY; MARÍA EUGENIA TAVERNA; S. GILETTA; CASIS, N.; DIANA ESTENOZ

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2022

0927-7757

The aim of this work is to evaluate the espina corona gum (ECG) as a sustainable viscosifier or filtration reducer additive in water-based drilling fluids (WBMs) as a potential replacement of guar gum (GG). ECG is a gal­actomannan isolated from leguminous seeds of Gleditsia amorphoides, trees that grow in South America with viscosifier properties and applications in the food area. ECG was characterized by FTIR, Z potential, intrinsic viscometry, TGA, and steady and oscillatory shear rheological analysis. Moreover, its effect on the main func­tional properties of WBMs was studied. Fluids contalning bentonite (BT), polyanionic cellulose (PAC), GG or ECG were prepared, and rheological, filtration, them1al and structnral properties were determlned. In order to study the theoretical rheological behavior, severa! models such as power law, Sisko and Herschel-Bulkley were eval­uated. The rheological studies revealed that WBMs contalnlng ECG exhibit higher viscosities in comparison with those with GG. Herschel-Bulkley paran1eters indicated that the WBMs with high ECG concentration showed higher yield stress. In addition, the presence of ECG improves the thermal stabiüty and filtration properties. The results indicate that ECG can be considered as an innovative, renewable and non-toxic altemative to partially or totally replace GG in WBMs.