Evaluation for CO2 Geo-storage Potential and Suitability in Dagang Oilfield

Abstract Beijing-Tianjin area is one of the most important economic area in China, CO2 emission is also quite large corresponding to the positive economic date in the area. CCUS (Carbon Capture, Utilization and Storage) technology has been considered as one of solution for CO2 emission reduction. Dagang oilfield is in the area and belong to Bohai Bay Basin, most of CO2 sources in the area, such as power plants, steel factories, refineries are located on or closed to Dagang oil field, so Dagang oilfield has been selected as the CO2 sink. In the paper, the evaluation model has been firstly set up, combing with the different methods. Then, the characteristics of Dagang oil field and the sub-oil fields has been evaluated. As there are several sub-oil fields in Dagang oil field, the sub-oil fields’ data has been collected and analyzed, the properties of the crude oil, such as MMP, have also been tested, the EOR potential for different sub-oil fields has been calculated and compared. One of typical sub-oil fields has been selected for the CO2-EOR (CO2 Enhanced Oil Recovery) pilot test. Considering the, Bohai Bay basin's fault systems are complex development and belonging to the earthquake-prone, the risk assessment for CO2-EOR storage in Dagang oil field has also been done.