Article contains detailed analysis and preliminary selection of potential emitters, who could be suppliers of gas for CCS-EOR projects in oil fields clusters in Poland. The idea of injection into clusters arises from the fact that oil reservoirs in Poland are relatively small, but very often located close together. Grouping reservoirs allows the potential storage capacity to increase significantly and improves economic indicators. In addition, CCS-EOR projects combine storage (CCS) with an increase in production from mature oil fields (EOR). The analysis was performed using a database of carbon dioxide emitters in Poland, which was created by the National Centre for Emissions Management. This database contains a list of all registered producers of with annual emissions exceeding 1 Mg. On this basis, potential sources of for previously selected four clusters of oil reservoirs were chosen.