The authors evaluate the effects generated in the economy of the Russian Far East by the new gas processing and petrochemical industries. The calculations are based on the regional social accounting matrix for 2015 augmented with data on gas processing technologies and consumption of their products. According to the calculation results, if the output of new industries reaches 38 billion m3 of gas and 2 million tons of polyethylene, the region's GRP will increase by 13.9% compared to 2015. In terms of the concept of sequential interindustry modeling, the authors estimate the temporal distributions of the obtained integral effects. The researchers conclude that without lags in production and consumption, the integral increase in GRP will be obtained after 40 cycles, with lags -after 50 cycles. The maximum discrepancies between the two trajectories of the macro indicator (without and with lags) will be observed in the period up to 25th cycle.