METHOD OF SYSTEMATIC SELECTION OF SOLVENT TO REMOVE ASPHALTENE-RESIN-PARAFFIN DEPOSITS CONSIDERING ESTIMATION OF ITS EFFECT ON KINETIC STABILITY OF OIL USING SPECTROPHOTOMETRIC INVESTIGATIONS

摘要

FIELD: oil and gas industry.SUBSTANCE: invention can be used to remove the asphaltene-resin-paraffin deposits during production. The method includes sampling of asphaltene-resin-paraffin deposits with parallel sampling of well product, comparative estimation of dissolving capacity of the solvents. Change of oil optical properties after contact with analyzed solvent is determined, oil optical properties after contact with analyzed solvent, oil optical properties after contact with analyzed solvent with control sample are compared, solvent effect on the kinetic stability of oil is estimated based on stability factor. Efficiency factor is determined as product of the stability factor and efficiency of dissolution. The stability factor is ratio of stable oil density in top layer of oil after mixing with solvent to optical density of the top layer of control oil sample without contact with the solvent.EFFECT: increased efficiency of deposits dissolving, excluded complications during oil production and treatment.1 tbl