Kazakhstan journal for oil & gas industryKazakhstan journal for oil & gas industry2707-42262957-806XKMG Engineering10893310.54859/kjogi108933Results of optimization of the ELOU-AVT Unit at the Atyrau Oil RefineryKarabassovaNagimanagima@inbox.ruhttps://orcid.org/0000-0001-6121-1125Atyrau Oil and Gas University named after Safi Utebayev813010202505022026Copyright © , Karabassova N.<p><strong>AB</strong><strong>S</strong><strong>TRACT </strong></p> <p><strong>Background. </strong>Increasing the depth of oil refining and improving the quality of commercial petroleum products are directly related to the efficiency of primary processing, particularly atmospheric oil distillation. This issue is highly relevant for the modern oil and gas industry, since in Kazakhstan, primary oil refining units were built during the soviet period and require modernization.</p> <p><strong>Aim.</strong><strong> </strong>Based on laboratory research, it was found that the content of light petroleum products in fuel oil exceeded the norm. To increase the yield of vacuum gas oil, raise the coke residue of the tar, and reduce the output of fuel oil at the ELOU-AVT unit, technological measures were implemented to increase the supply of live steam to the bottom of the atmospheric column and reduce its consumption in the vacuum column.</p> <p><strong>Materials and methods.</strong><strong> </strong>To study the fractional composition of fuel oil, the ADO laboratory setup was used. Data from analytical control of ELOU-AVT products and material balance calculations are presented. Diagrams illustrating the yield of light petroleum products were constructed to visualize the obtained results.</p> <p><strong>Results.</strong><strong> </strong>During the experimental and design phase, the content of light petroleum products in fuel oil was reduced from 7% to 5.5%. The coke residue of tar increased from 10.199% to 10.619%. An increase in the yield of gasoline, jet fuel, vacuum gas oil, and vacuum diesel fuel was recorded.</p> <p><strong>Conclusion. </strong>Based on the conducted research, technological improvements were proposed for the existing primary oil refining unit. During the production implementation, the content of light fractions in fuel oil decreased, while the output of light petroleum products increased. These measures ensured a higher degree of fuel oil processing in the vacuum column, which in turn contributed to a greater overall depth of oil refining.</p>fuel oil, atmospheric-vacuum distillation, steam supply, light petroleum products, oil refining depth.мазут, атмосфералық-вакуумдық айдау, бу беру, жеңіл мұнай өнімдері, мұнай өңдеу тереңдігі.мазут, атмосферно-вакуумная перегонка, подача пара, светлые нефтепродукты, глубина переработки нефти.