Possibility of decreasing CO2 emissions from flaring on a mature oil field

Analysis of change in composition of flaring gas during the exploitation period of an oil reservoir has been performed to estimate possibilities for feasible reduction of CO2 emissions during hydrocarbon production. There are many projects regarding improvements of energy and flare efficiencies or possibilities for CO2 separation and storage, but none of them calculates emissions for different p-T conditions. Numerous oil fields do not have possibilities for transport of gas separated during oil production to final consumers due to technological or economic limitations. This paper deals with possibility of introducing small technological improvement like implementation of gas separator, which might lead to CO2 reduction at flare. First, it was necessary to calculate accurate oil production decline through lifetime of a reservoir, then pressure decline for a mature oil field was correlated. The payout period for such improvement, along with other economical parameters, has been calculated in economic analysis. It can be concluded that CO2 reduction is possible and economically feasible by introducing separator at oil production field.