Water shut-off in conditions of a thin oil rim of the T field. Technology assessment, laboratory research

Abstract

Purpose. Search for optimal formulations for chemical water shut-off based on polycarylamide and emulsifier.
Materials and methods. Review of existing water shut-off methods. Conducting laboratory studies in bottle tests of formulations differing in rheological properties to determine the optimal ratios of chemical reagents.
Results. The review of existing water shut-off methods was carried out, and possible template designs for water shut-off at wells of the T oil and gas condensate field were shown. Laboratory studies were carried out in bottle tests of various emulsion formulations (based on the Isoplast B reagent) and polymer compositions (based on polyacrylamide AK-642).
Conclusion. The most applicable technology for the conditions of the T field is chemical water shut-off. Optimal formulations 2 and 3 of the Isoplast-D composition, which have selective properties, have been identified. Recipes 1, 2, 3 of cross-linked polyacrylamide brand AK-642 are capable of forming stable gels. The completed studies make it possible to conduct field tests of the formulations of the proposed reagents in the T field.