Abstract
The rheological properties and filtration loss property of water-based drilling fluids greatly depends upon the quality and quantity of the bentonite clay, as well as the additives that are used in their formulations. To ascertain the quality of the bentonite clay, three raw Indian bentonite clays have been characterized using X-ray diffraction techniques and X-ray fluorescence techniques. The physicochemical properties, like swelling index, cation exchange capacities, and yield of clay, have also been carried out using standard API recommended procedures. The laboratory investigation reveals that these three bentonite clays are quite suitable for the development of water-based oil well drilling fluids.
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