Optimisation of gas mixture injection for enhanced coalbed methane recovery using a parallel genetic algorithm

Gas injection in coalbed Methane reservoirs is an environmentally friendly and economically viable enhanced recovery technique. Promising results can be obtained by injecting a mixture of CO2 and N2. The optimum composition is a function of geomechanical and sorption characteristics of the coal. In the current study, it is sought to optimise the composition of the injected gas, based on an economic objective function. The decision variables are...