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| Formulation of Drilling Mud Using Neem Seed Oil (AzadirachtaIndica) and Refined Waste Lubricating Oil as Base Oil
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Mfon I. Otite-Douglas, Okotie Matilda Oghenefegor&Onemu Eseoghene
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Abstract:
The study investigated the formulation of drilling mud using Neem seed oil and refined waste lubricating oil as an alternate to diesel oil in the formulation of oil-based mud. Different tests conducted to ascertain the suitability of their properties for drilling operation include toxicity, filtration, pH, viscosity and density were conducted to. Also, the rheological and other physicochemical parameters of this formulation were compared with formulations from diesel oil, Neem seed oil and waste lubricating oil. The study demonstrates that the mud formulated from diesel oil gave a higher stability of Neem seed oil mud. The pH of Neem seed oil-based mud lower than diesel oil-based mud (OBM). Again, the neem seed OBM had a plastic viscosity of 27cp, yield point of 246Ib/100ft2 and 30minutes fluid loss of 5.6ml with a filter cake of 1.4mm. On the overall, the Neem seed oil-based muds are a viable replacement for the diesel oil-based muds. Meanwhile the refined waste lubricating oil mud had a plastic viscosity of 18cP, yield point of 150lb/100ft2 and 30minutes fluid loss of 5.2ml with a filter cake of 1.2mm while the diesel oil based mud had a plastic viscosity of 40cP, yield point of 50lb/100ft2 and 30minutes fluid loss of 10.8ml with a filter cake of 3.1mm. The toxicity test showed that refined waste lubricating oil mud was the most eco-friendly when compared with diesel oil based mud. Hence, the paper conclude that, the formulated muds when compared with standard mud (i.e. diesel oil base mud), the formulated muds (i.e. Neem seed oil-based muds and refined waste lubricating oil mud) stand a chance of being a viable replacement for the conventional diesel oil-based muds due to their better and more durable characteristics than conventional diesel oil-based muds. As such, the temperature effects on the mud rheological properties and also on other properties of the formulated mud should be checked.
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