Drilling fluid, commonly known as drilling mud, plays a crucial role in the construction of wells for oil and gas extraction, geothermal energy production, and other subterranean activities. The chemistry of drilling fluids is complex, involving a mixture of base fluids (water, oil, or synthetic compounds) and various additives such as clays, polymers, and salts. These components are designed to lubricate and cool the drill bit, stabilize the wellbore, control formation pressures, and carry drill cuttings to the surface. The interaction between these fluids and cement used for well casing and zonal isolation is critical, especially under the severe environmental conditions found in deep and ultra-deep wells.