What happens if the hydrostatic pressure is too low in the well?

When the hydrostatic pressure in the well is too low, it significantly compromises the ability to maintain control over the wellbore. Hydrostatic pressure is critical as it counterbalances the pressure exerted by the fluids in the formations being drilled. If this pressure falls below the formation pressure, the well becomes vulnerable to formation fluids – like gas, oil, or water – entering the wellbore. This influx of formation fluids is known as a "kick," which can escalate into a more serious situation if not addressed promptly.

Maintaining adequate hydrostatic pressure is essential in preventing kicks, as it helps keep these potentially dangerous fluids from flowing into the wellbore. Thus, the situation described in the correct answer directly links to a critical aspect of well control and safe drilling operations.