Nowadays, there are no large production facilities to produce unsaturated hydrocarbons in the Orenburg region. Unsaturated hydrocarbons are produced in small quantities by PJSC “Orsknefteorgsintez” at the installation of hydrocracking, but this is not the target product and its quantity is minimal. Relying on this fact, we can assume that, by implementing the pyrolysis plant at the Orenburg gas-chemical complex, it is possible to make a worthy competition to existing enterprises, additionally provide the region with the product, and get more profit to the plant, as the cost of olefins is higher than that of the broad fraction of light hydrocarbons or individual components at its separation. The main production of propylene and butadiene is the process of thermal pyrolysis of hydrocarbon materials in tube-type furnaces in the presence of water steam. Unsaturated hydrocarbons can be obtained in other refining processes, but other plants produce unsaturated hydrocarbons in small quantities, which does not meet the demand for olefins. Based on the calculations and the analysis of the background, it can be concluded that the involvement of the NGL pyrolysis plant in the Orenburg gas chemical complex will allow more deeply processing non-targeted products and will be economically beneficial to the enterprise. The amount of produced propylene and butylene is comparable to the leading enterprises producing unsaturated hydrocarbons. These materials can be sold to neighboring regions for further processing and used for their own needs.