AbstractThis paper shows the effects of storage capacity on the selection of least cost CO2 transport infrastructure design where there are two candidate injection sites (sinks) and a static supply of CO2 (source). We investigate the least cost pipeline configuration under different combinations of CO2 flow rates, pipeline lengths and storage capacities. A frequency distribution of least cost design shows that the capacity of the smaller sink is one of the main drivers for pipeline design. The insights gained from this study can also be applied in large-scale CO2 pipeline networks optimisation.