What are the method of Borehole survey?
Borehole surveys can be conducted using various methods including downhole logging tools, such as gamma ray, resistivity, neutron porosity, and sonic tools. These tools are lowered down the borehole and provide data on the properties of the rock formations. Another method is borehole camera surveys, where a camera is deployed down the borehole to visually inspect the borehole wall and any potential issues. Sampling and core analysis are also common methods to gather geological and geotechnical information from boreholes.