Abstract
New composite mixtures have been created to remove and dissolve asphalt-resin-paraffin deposits (ARPD) of the Uzen and Karazhanbas oilfields. The analysis of the structural-groupcomposition of ARPD was carried out and the solvent capacity of binary solvent systems containing straight-run gasoline and o-xylene was evaluated. Atactic polypropylene in an amount of 0.1 -0.5 mass.% was used as the active component. The selection of ARPD solvent compositions and an assessment of their effectiveness were carried out in dynamic and static modes. It was revealed that the created composite systems provide complete destruction and dissolution of the ARPD, the solvent composition containing 50 mass.% of the o-xylene, 50 mass.% of the straight-run gasoline and 0.5 mass.% of the atactic polypropylene (APP) has the best washing, dissolving and removing effect. When using this solvent composition, a maximum increase in solvent saturation with high molecular weight paraffin compounds is observed.