Abstract
This chapter synthesises the iron nanoparticles (NPs) by the chemical reduction method using the ferric chloride (FeCl3) as a precursor and the sodium borohydride as a reducing agent. It studies the filtration properties for 0.1 M and 0.2 M FeCl3. The chapter then examines the effect of iron NPs on water-based mud (WBM). Drilling fluid is basically a circulating fluid used in oil and gas well drilling operations. The various kinds of drilling fluids available are WBM, oil-based mud, synthetic-based mud, and so on, of which WBM is most widely used. In the Upper Assam Basin, WBM is mostly widely used. The chemical reduction method was employed for synthesising iron NPs. After synthesising iron NPs, their characterisation was done using an ultraviolet (UV)-visible spectrophotometer and a particle size analyser. The UV-visible spectrophotometer gave the maximum absorbance of iron NPs, which was compared with the standard.
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