Delayed carbonization is one of the most dynamically developing technologies in global petroleum processing. The basic factors determining the material balance and the quality of carbonization products are process parameters and quality of the feedstock used. However, data on the dependence of yield of gaseous and liquid carbonization products on the quality of the feedstock are absent in the domestic literature. This paper presents the developed mathematical models of the yield of heavy oil residue carbonization products, which help control products yield by varying the proportions of the components in the feedstock, taking account of the change in carbonizability of each component of the feedstock.