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

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.