Том: 4 , Год издания: 2011

A two-year project entitled "Assessment of the Feasibility of CO₂ Storage in the Russian Permafrost" was carried out in Russia in collaboration with the Siberian branch of the Russian Academy of Sciences. This project delivers new conclusions about the safety role of the permafrost and specific conditions of storage in an area of abnormal geothermal gradient in Western Siberia. One of the specific issues of the project was the potential formation of carbon dioxide hydrates from the injected CO₂ and the possible reaction between the existing methane hydrates and the injected CO₂. Maps have been constructed showing the areas of CO₂ hydrate stability. A second specific issue was the compatibility of CO₂ storage in the permafrost with oil production. Pilot tests of EOR technologies, involving either the injection of CO₂ or the generation of CO₂ in situ, proved very efficiency for high-viscosity oil pools. Therefore, we propose to inject CO₂ in West Siberia into high-viscosity oil fields. High-viscosity oil fields are mainly located in the centre of the Western Siberian Basin in Khanty-Mansijsk autonomous okrug (KMAO). An alternative or complementary solution is storage in aquifers. Deep aquifers, such as the Pokur formation overlain could also be storage targets, but their potential is unknown because they have not been explored in detail