The effect of Graphite and Olive Waste on the Rheological and Filtration Properties of Saudi Class G Cement

Cementing process is one of the most crucial parts of the drilling operation that could determine the durability and the stability of the oil or gas wells. Many additives had been introduced into the formula of the oil well cement to reach certain quality to support the well. "Greener" materials, such as olive waste, which is waste from the olive oil extraction process, have a huge potential to be utilized in well cementing to reduce the waste material in the environment. This study aims to analyze the effect of olive waste and graphite material on the rheological and filtration properties, compressive strength, and permeability of the cement sheath. Three different formulas of cement, base, graphite-based, and olive waste-based cement were used in this study. The result showed that the graphite and olive waste successfully increased the compressive strength by 106% and 110%, compared to the base cement, respectively. They also decreased the cement permeability as compared with the base samples. Although it increased the plastic viscosity and decreased the yield point of the cement slurry, the incorporation of olive waste into the cement slurry significantly decreased the water filtration.