Smart Bentonite Drilling Muds Modified with Iron Oxide Nanoparticles and Characterized Based on the Electrical Resistivity and Rheological Properties with Varying Magnetic Field Strengths and Temperatures

摘要

In this study, the effects of magnetic field strength and temperatures on the electrical resistivity andrnrheological properties of a sensing smart bentonite drilling mud modified with iron oxide nanoparticlesrn(nanoFe2O3) were investigated. The bentonite contents in the smart drilling muds were varied up to 6% byrnthe weight of water, and the temperature was varied from 25°C to 85°C. The magnetic field strength wasrnvaried up to 0.6 T. The nanoFe2O3 contents (particle size of 30 nm and surface area of 38 m2/gm) in therndrilling muds were varied up to 1% by the weight of drilling mud to enhance the sensing electrical resistivityrnand the rheological properties of the drilling mud. The initial resistivity of the 2% and 6% bentonite drillingrnmud were 9 Ωm and 5.5 Ωm, a 39% reduction in resistivity, a good sensing property.