methods for the analysis of the borehole using a non radioactive material, by irradiation in an isotope is transformed into.

摘要

A method of logging a well includes the steps of moving a tagging agent into a well so that the tagging agent is deposited in an earthen formation of the well, which tagging agent is non-radioactive at least until just prior to entering the well; irradiating the tagging agent so that the tagging agent exhibits at least one tagging agent characteristic distinguishable from earthen formation characteristics, and detecting the at least one tagging agent characteristic after the tagging agent has been deposited in the earthen formation.