Improving the efficiency of water shut-off operations in gas condensate wells with a subhorizontal end of the trunk

The article discusses the main aspects of carrying out repair and insulation work to isolate the influx of formation water in wells with a subhorizontal borehole termination equipped with filters. To improve the technology for carrying out waterproofing work, requirements have been formed for compositions for carrying out repair and insulation work in wells with a subhorizontal borehole termination equipped with filters. Research methods are based on the analysis and generalization of field data on the problems being studied, as well as on the results of our own analytical and theoretical studies using the results of laboratory research and mathematical apparatus using modern hardware and software. The results of studies that allow us to establish the factors that determine the quality (success) of waterproofing work in wells are presented. It has been established that the basic direction for improving technical and technological solutions for waterproofing work is the technical and economic assessment of technological processes, and a procedure for a generalized determination of the effectiveness of the process of repair and insulation work has been proposed. The necessary data for assessing the compliance of the insulating material with the specific conditions for carrying out repair and insulation work and the problems solved when isolating the influx of formation water in gas wells with a subhorizontal termination of the wellbore are substantiated. A method for interval isolation of the influx of formation water in wells by installing impenetrable and reliable insulating screens in the wellbore is proposed. Keywords: well; isolation; formation water; subhorizontal borehole.