Light Cement Formulations for Oilfield Applications: Enhancing Fluid-Loss Control and Rheological Properties with Recycled and Milled Fiberglass

ABSTRACT: Drilling requires cementing as it provides zonal isolation, increased production efficiency, wellbore stability, and environmental safety. This study investigates recycled and milled fiberglass as a fluid-loss control agent and rheological enhancer to develop sustainable cementing solutions. Three types of fiberglass- E-Glass, I-Glass, and recycled Windmill Glass (W-Glass) - were added to Portland Class A cement slurry at 3%, 6%, and 9% By Weight of Cement (BWOC). The aim was to observe their impact on fluid-loss, viscosity, shear resistance, and yield point. A low-pressure, low-temperature (LPLT) static fluid-loss tester and a Fann 35A viscometer quantified filtration and rheological properties respectively. Fluid-loss decreased significantly, with E-Glass and I-Glass reducing rates by 50% at 6% BWOC and by 54% and 57% at 9% BWOC, respectively. A 481.25% rise in plastic viscosity and 383.74% in yield point was reported for E-Glass, and a 293.75% rise in plastic viscosity and 487.5% in yield point was reported for I-Glass. W-Glass showed an 87.5% increase in plastic viscosity and a 75% increase in yield point at 6% BWOC. This study demonstrates the potential for robust, efficient, and environmentally sustainable cementing solutions for drilling in challenging environments.