What does a wellbore survey measure?

A wellbore survey is an essential process in drilling operations that provides crucial information about the borehole's geometry. It specifically measures the position and inclination of the borehole, which are vital for various reasons. Knowing the exact location and angle of the borehole enables drillers to ensure that they are on target with their drilling objectives, such as reaching specific formations or resources.

Accurate measurements of the wellbore's path help in avoiding potential drilling hazards, such as hitting undesired zones or colliding with other wells. Additionally, this data is indispensable for planning future operations, as it allows operators to assess the well's trajectory in relation to geological formations and potential reservoirs.

The other aspects mentioned, such as cost-effectiveness, temperature of the drilling fluid, or the chemical composition of the rock, do not form the primary focus of a wellbore survey. These elements can be relevant to the broader context of drilling but do not pertain specifically to what a wellbore survey is designed to measure.