Investigation of the inhibitory capacity of compositions based on complexons and surfactants in relation to sulfate deposits

UDK: 661.18:622.276

DOI: 10.24887/0028-2448-2026-7-120-124

Key words: salt deposition inhibitor, sulfate deposits, complexones, nitrilotrimethylphosphonic acid, surfactants, adsorption-desorption properties

Authors: M.A. Silin (Gubkin University, RF, Moscow); L.A. Magadova (Gubkin University, RF, Moscow); V.D. Kotekhova (Gubkin University, RF, Moscow); A.G. Soloveva (Gubkin University, RF, Moscow)

Every year, the main reserves of oil fields are depleting, so the main task in the development of oil fields is the maximum extraction of oil reserves. One of the ways to intensify oil production is to combat salt deposition. Therefore it is more effective to prevent precipitation than to remove the consequences of salt deposition during the well operation. Consequently, the use of complexones-based inhibitor compositions is one of the main methods for protecting wells from salt deposition. Sulfates are the most difficult inorganic deposits to remove. In this work, the components for the salt deposition inhibitor were selected and their ability to prevent the precipitation of sulfates was studied. The dependence of the inhibitory capacity of the complexones on the addition of extra components was investigated. The optimal ratio of components in the mixture for inhibiting sulfate deposits was selected. The physical and chemical characteristics of the developed composition were determined, and the inhibitory composition was tested for its ability to reduce the corrosiveness of the environment. The developed salt deposition inhibitor was tested on several mineralized waters that contain various precipitating ions. Additionally, the adsorption and desorption properties of the inhibitory composition were investigated to determine its potential use in the technology of injecting inhibitors into the reservoir.

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