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When developing oil fields, water flooding is often used to displace oil. In this case, effective oil production is possible with a detailed study of hydrodynamics in the reservoir. Recently, organic phosphors have been used for these purposes, which are pumped into the formation through injection wells. The spectral characteristics of the excitation (absorption) and luminescence of produced water with phosphors can provide information on the hydrodynamic relationship between injection and producing wells and the ...