EXPERIMENTAL INVESTIGATION OF DEFATTED MORINGA SEED CAKE AS A NATURAL ADDITIVE FOR RHEOLOGY AND FLUID LOSS CONTROL IN WATER BASED DRILLING MUD
Abstract
This study explores defatted Moringa oleifera seed cake as an eco-friendly additive to enhance
rheology and control fluid loss in water-based drilling muds, addressing the environmental and
economic drawbacks of synthetic polymers. The additive was prepared through cold-press oil
extraction followed by warm-water washing to remove hydrophobic residues, then incorporated
into API-grade bentonite mud at incrementally increasing concentrations. Rheological properties
were evaluated using a rotational viscometer following API RP 13B-1 protocols, while filtration
performance was assessed via standard low-pressure filter press testing. Results revealed
consistent, concentration-dependent improvements in apparent viscosity, plastic viscosity, yield
point, and gel strength, reflecting enhanced particle networking and thixotropic behaviour suitable
for effective cuttings suspension and pumpability. However, fluid loss volumes increased with
higher additive loading, exceeding industry benchmarks, despite formation of thin, uniform filter
cakes, indicating limited standalone filtration control. Defatted Moringa seed cake demonstrates
strong potential as a biodegradable rheology modifier derived from abundant agro-waste. To
achieve balanced performance, hybrid formulations with conventional fluid loss agents are
recommended, alongside high-temperature aging, shale inhibition testing, and field trials to
develop compliant, high-performance water-based mud systems for sustainable drilling
operations.
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