Micro-emulsion-based dissolver for removal of mixed scale deposition

摘要

The term mixed scale pertains to the scales found in oil and gas production system containing both organic and inorganicconstituents in such a way that either aqueous-based inorganic dissolver or solvent-based organic dissolver fails to act on it.These scales are also known as wetted scales. This research discovers formulations which can e?ectively dissolve and dispersemixed scales dominated by inorganic content. Micro-emulsion-based solutions are identifed as the best in tackling suchmixed scales. A few inorganic and organic dissolving chemicals along with surfactants and co-surfactants are considered inthis research to develop environment friendly solutions. The stable micro-emulsions are subjected to detailed dissolution studyto establish their efcacy. The synthesized chemical solutions are shown to dissolve mixed scales of di?erent composition.A chelant-based micro-emulsion formulation is also found to be e?ective in dissolving difcult to treat metal naphthenatescales co-precipitated with organic content, which is a novel application.