At present, it is just a beginning to carry out the pilot project researches about injecting CO2 into subsurface oil reservoirs to successfully storage partial CO2 in our country, many research methods involving in how to storage CO2, therefore, need to be tried slowly step by step. This paper based on the Daqingzijing district in Jilin oilfield, evaluates the CO2 storage project operating in the study area in detail now from three main aspects, including the reservoir storage capacity, the storage stability and the hydrogeological conditions. Generally, the valid thickness of reservoir, the dimensional scale of sand distribution, the physical property and microstructure of reservoir, and at the same time, the vertical and horizontal succession and connectivity among various sands are the critical factors to evaluate the reservoir storage capacity. Regional reservoir studies demonstrate the storage capacity in the study area is large, and the effective thickness of reservoirs adapt to storage CO2 is nearly 273m on an average. In the meantime, some conditions, such as the caprock, the fault-fractured system and the injection and abandoned wells are very important to guarrantee to storage safely and decrease the possible leakage risk effectively. The studies indicate in the study area there are huge formations consist of closed muds mainly upper the reservoir, and there are few or simple faults or fractures inner the formations, which adapt to be taken regard as the favorable caprock, at the same time there are many insulations and interbeds consist of muds and silty-mud among the reservoir sand, which can be the barrier to CO2 movement or leakage. In addition, Hydrogeological data including total dissolved solids (TDS) and hydrochemistry mainly indicate there is obvious boundary of TDS between the study area and areas nearby, and there is simple chemical component, NaHCO3, which to some extent demonstrate there is a relative independent hydrogeological system in the study area. In summary, according to evaluate the three aspects above, the geological storage framework of CO2 subsurface storage can be built up, which indicate the geological setting of the Daqingzijing area is considered highly suitable for secure, long-term storage of CO2.