The gasification behavior of mixtures of oil residues (fuel oils) and vegetable raw materials (VRMs) (agro-industrial wastes, sunflower seed shells, corn cobs) is investigated. The effects of batch and continuous processes on the product yield and composition are studied. Preliminary mechanical activation of composite feedstock and selection of the optimal ratio of VRMoilwater mixture components and oxygen content in the blast air were found experimentally to allow high feedstock conversion and produce syngas suitable for synthesis of organic compounds.