SWAT SPECTRAL WELL ANALYSIS
SPECTRAL GAMMA RAY
Records entire spectrum of all natural emitting gamma rays and previously injected isotopes during stimulation (frac). Each isotope energy level, measured in electron volts (KeV), is simultaneously recorded at the surface.
The resulting spectral provides vital data to determine the placement of all frac fluids and/or proppants.
The spectral survey can be observed on a remote monitor while the downhole spectral survey is being recorded. Does not have to retrieve spectral gamma ray from downhole before getting survey results.
Other services recorded on same trip downhole are correlation gamma ray, temperature survey, and collar log for depth control with other surveys.
Isotopes Commonly Used for Tagging
Isotope Half-Life Gammy Ray
Iridium-192 74 Days 317,468,604
Scandium -46 84 Days 889,1120
Antimony -124 60 Days 603,1691
Iodine -131 8 Days 364