Study On The Dynamic Storage Potential Of CO₂ In Reservoirs Around Jing-Jin-Ji Region

Beijing-Tianjin-Hebei and its surroundings are economically developed regions in China,and are also one of the regions with high CO₂ emissions.How to reduce carbon emissions is an urgent issue in the region.CCS technology is a really feasible way to reduce emissions.In view of the long-term water flooding of the Beijing-Tianjin-Hebei oilfield,which has the characteristics of large pores,high permeability,and large number of mantle channels,the CO₂ gel foam was injected into the reservoir to achieve the target of flooding and storage;at the same time,the Beijing-Tianjin-Hebei reservoir was integrated.The characteristics,as well as the changes in the state of CO₂ gel foams,have investigated the dynamic storage potential of reservoirs in the Beijing-Tianjin-Hebei region.A stable CO₂ gel foam was developed and formulated with 0.25%tetradecyl hydroxypropyl phosphate betaine+3500 mg/L HPAM+0.3%organic chromium.Using the international general-purpose carbon dioxide storage potential calculation model and combining domestic oil reservoir characteristics,the static storage potential and enhanced oil recovery calculations were performed for a total of 1547 blocks in North China,Jidong and Shengli Oilfields in the Beijing-Tianjin-Hebei region.The EOR potential of CO₂ in the three major oilfields of Beijing,Tianjin and Hebei is11283.1×10⁴t,and the static storage potential of CO₂ is 37845.9×10⁴t.With the injection of CO₂ gel foam,the injection pressure gradually increased and the amount of CO₂ sealed gradually increased.The CO₂ gel foam system in the reservoir gradually changed from a foam state to a supercritical state.Under different temperature conditions,the system studies the relationship between injection pressure and CO₂?foam state?density,and combines the characteristics of reservoirs in the Beijing-Tianjin-Hebei area,and carries out the dynamic storage potential of CO₂ foam in reservoirs in the Beijing-Tianjin-Hebei area.Systematic calculations and comparative studies.