Effective management of asphaltene-paraffin-resin deposits in the installations of oil and gas distribution systems, along with corrosion control, is one of the most pressing issues. One of the important issues arising from today’s demand is the development and testing of new multifunctional complex inhibitors and compositions based on them designed to combat asphaltene-resin-paraffin deposits and corrosion under laboratory and mine conditions. This paper reports on the laboratory testing of a new multifunctional composition that inhibits the formation of asphaltene-resin-paraffin deposits and corrosion processes in the oil well-gathering-transportation system. The effect of Difron-4201 depressant additive and ED composition on the freezing temperature of a high-paraffin crude oil sample, the formation of asphaltene-paraffin-resin deposits, and the surface tension coefficient were studied for the first time under laboratory conditions. It was found that, compared to the Difron-4201depressant additive, the ED composition exhibited higher efficiency. Specifically, at an optimal consumption concentration of 900 g/t for the Difron-4201 depressant additive and 700g/t for the composition, the highest efficiency was 190% and 200% respectively for freezing temperature reduction, 89.8% and 96.1% for the formation of asphaltene-paraffin-resin deposition, and 63.3% and 76.6% for surface tension reduction. Furthermore, the effect of the IB-1 inhibitor and the ED composition on the viability of sulfate-reducing bacteria in Postgate-B-nutrient medium along with corrosion rate in aggressive media containing hydrogen sulfide, carbon dioxide, and a combination of both were studied. Laboratory experiments determined the optimal consumption rate of the IB-1 inhibitor determined to be 25 mg/l. The corrosion protection effect at the optimal concentration of the inhibitor and the ED composition was 97.1% and 99.2% in hydrogen sulfide medium, 94.6% and 95.4% in carbon dioxide medium, and 93.6% and 94.7% in a combines hydrogen sulfide and carbon dioxide medium, respectively.
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Gurbanov et al. (2024) studied this question.