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Abstract

A solvent which is a mixture of aromatic hydrocarbons of the C9 fraction and aliphatic alcohols in a 1:1 ratio, a nonionic surfactant in an amount of 1 - 3% by weight has been developed. It leads to an increase in the dissolving and washing capabilities of the solvent for more than 2 times in relation to paraffin-type AS. The ability of the chemical composition, which is a solvent composition, to have a depressant-dispersing effect in relation to paraffin-type AS has been determined.

Despite a large number of studies devoted to the development of technologies for the removal of organic deposits in oilfield equipment (they mainly solved individual tasks for the removal or prevention of ARPD in wells), little research has been carried out on the creation of an integrated technology for the removal and prevention of organic deposits in wells, providing physicochemical impact on a single hydrodynamic system "well-PZP ". The aim of this work is to improve the efficiency of wells operation at the late stage of oil field development in conditions of asphalt-resin-paraffin deposits formation. The product of rectification of pyrolysis distillate - fraction 70 - 180 ° С was used as a source of hydrocarbon raw materials. As a nonionic surfactant in a solvent, it was proposed to use a depressant-dispersant additive "DDA-10", which is a composition of a depressant additive based on a copolymer of ethylene with alpha-olefins, capable of reducing the pour point of oil, and an amide-type paraffin dispersant, which prevents the growth of crystals paraffin’s in the extraction, transportation and storage of oil.

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Last Page

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