The Effect of the Olive Waste on the Rheological Properties, Thickening Time, Permeability, and Strength of Oil Well Cement

In the oil and gas industry, cementing is a very important process to maintain the stability of the well. The cement slurry is injected downhole to fit the annulus between the casing and formation which in further can perform as an effective plug against fluids movement and at the same time supports the casing. In the design of the cement slurry, different types of additives are used based on operation conditions, incorporation of a new additive considerably affects all properties of the cement slurry and the solidified sheath. In this work, lab experiments were performed to investigate the effect of olive waste on Saudi Class G cement properties, the possibility of replacing the commercial retarder with olive waste was also studied in this work. Five samples with different olive waste content were prepared, and the rheological characteristics, thickening time, mechanical properties, and permeability of the samples were evaluated after 24 hours of curing at 95 °C. The results indicated that olive waste was able to replace the use of a commercial retarder. The addition of olive waste did not affect the cement plastic viscosity, while the yield point, 10-sec and 10-min gel strength of the cement were considerably increased with the increase in the olive waste content. The cement compressive strength was also increased with the incorporation of olive waste of a maximum of 0.375 %, and the permeability was decreasing with the addition of a maximum of 0.25 % olive waste.