What is a result of the connection gas effect on drilling operations?

The connection gas effect refers to the influx of gas into the wellbore during the process of making a connection while drilling. This phenomenon can lead to a decrease in bottom hole pressure. When gas enters the wellbore, it can displace the drilling fluid, which may result in a temporary drop in the hydrostatic pressure exerted by the drilling mud. If the bottom hole pressure decreases significantly, it can create a risk of well control issues, such as a kick or blowout if the formation pressure exceeds the now reduced bottom hole pressure.

The other options relate to outcomes that are generally not associated with the connection gas effect. For instance, an increased rate of penetration may occur due to improved bit performance but is not directly related to the presence of connection gas. Improved mud circulation pertains to effective fluid flow in the system and is also not a direct result of the connection gas effect, nor does it address the pressure dynamics affected by gas influx. Lastly, stabilization of the formation involves maintaining consistent downhole conditions, which can be compromised by fluctuations in wellbore pressure due to the connection gas effect.