Evaluation of the potentiality and suitability for CO2 geological storage in the Junggar Basin, northwestern China

•An indicator system of CO2 geological storage suitability assessment with three indicator layers and 27 indicators is constructed on the basis of the geological conditions in the Junggar Basin.•The suitability of all the secondary tectonic units in the Junggar Basin are evaluated.•The indicator system, method and result of the evaluation will provide scientific basis for further screening of the CO2 geological storage site in Junggar Basin.