Patent ID: 6725926
Filing Date: 2004-04-27
Classification: C09K,E21B,Y10S

Abstract:
A method of treating a subterranean formation having multiple zones penetrated by a well bore comprising:providing a plurality of treatment compositions comprising a tracking material, wherein the tracking material is substantially non-radioactive and is selected from the group consisting of water soluble inorganic salts, water soluble organic salts, metals, metal salts of organic acids, metal oxides, metal sulfates, metal phosphates, metal carbonates, metal salts, phosphorescent pigments, fluorescent pigments, photoluminescent pigments, oil soluble dyes, oil dispersible dyes and oil dispersible pigments; introducing a first treatment composition and a second treatment composition selected from the plurality of treatment compositions into respective ones of the multiple zones in the subterranean formation wherein the first treatment composition comprises a different tracking material than the second treatment composition; flowing fluid back from the subterranean formation and collecting at least a portion of any of the first and second treatment compositions that flows flow back from the subterranean formation; and detecting the tracking material in any collected portions of the first and second treatment compositions.