Paper: An Improved Radioactive Tagging System For Stimulation Evaluation

In the past, in wells that were candidates for fracturing or acidizing treatments, it was found that the use of temperature and radioactive material were very beneficial in evaluating where the fluid and propping agents, if any, were located in the formation. Both of these methods had their drawbacks. This paper deals with overcoming some of the problems associated with radioactive material only. An automatic system has been designed for pumping fluid into the frac line (pressure side) using an ion exchange resin as the isotope carrier to improve evaluation of the fluid and or proppant-laden fluid moving into the zone. Also, this procedure eliminates some downhole contamination problems which have caused difficulty in interpreting staged stimulation work.