The article considers the problem of salt deposition at oil and gas production facilities which is a topical issue in the oil industry and a factor that significantly complicates oil production, transportation and treatment. The main reasons of salt precipitation are such processes as dissolution of rocks, change of thermobaric conditions, mixing of incompatible waters, change of total water mineralization. In this work the authors carried out studies of compositions based on chelating agents, which showed high efficiency of dissolution of various modifications of calcium sulfate as an intensifying composition. In this work, compositions based on organic acids are considered, as they have a delayed reaction with rock (compared to mineral acids), as a result of which it is possible to achieve a deeper penetration of acid into the formation. Scientific, technical and patent literature on chelating agents used as inhibitors and solvents of salt deposits is reviewed. Mechanisms of interaction of chelates with water insoluble inorganic salts (calcium and magnesium carbonates, calcium and barium sulfates) are considered. Nowadays the creation of stimulation compositions for oil wells is an urgent issue. The study is devoted to the evaluation of solubilizing ability of three different stimulation compositions based on chelates developed at Gubkin University.
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