3.1. Overall Methodology Rationale
The first question we have to answer in this study is:
Is there a gap between the existing effort in storage development and the IEA 2020 recommendations and where?
To assess the technical potential of storage projects excluding CO2-EOR, we firstly examined this issue only looking at the technical causes of success and failure of storage development. This first step led us to quantify a number of additional projects to achieve IEA 2020 (and 2050) recommendation. In a second step, we then integrated the non technical causes (political, economics, public acceptance) as well as CO2-EOR potential contribution to weight the results obtained in the first step.