Evaluation Of Carbon Dioxide Geological Storage Potential In The Tarim Basin

Because of the greenhouse effect on global climate impact, the environmenthuman existed is suffering severe threat. After the World Climate Conference openedin Copenhagen, All countries have realized the importance of carbon dioxideemissions. China, a responsible developing country, has made the commitment ofcarbon dioxide emissions: By 2020, unit of gross domestic product of carbon dioxideemissions will reduce 40% ~ 45% percent compared with 2005.Carbon dioxide Geological Storage (CGS), the developing technology in recentyears, is the most lucrative way to reduce carbon dioxide emissions effectively. As thetechnology growing. Our government departments,relevant organizations andscholars had carried on the related research in theory and experiment. This thesis isleaded by Centre for Hydrogeology and Environmental Geology, precedes theevaluation of geological storage potential carbon dioxide for Tarim Basin, and is theimportant component of evaluation of geological sedimentary basin in main storagepotential carbon dioxide.In order to the paper study, I'm a wide range of learning the Carbon dioxideGeological Storage technology ,such as: the required geological conditions, thestorage mechanism; and collect the related geological data of Tarim Basin, includingregional geological, tectonic geology, oil and gas geology, hydrology geology, andstratigraphic lithology and physical parameter etc. Then sort out these material andanalyze the trap structure and deep salty water aquifers developing in the basinfirst-order tectonic units, find out the store—cap rock combination for carbongeological storage potential calculation and suitability assessment. Make thefollowing conclusions:1,The geological storage potential of carbon dioxide in Tarim Basin is great.Each first-order tectonic units are distributed a suitable reservoir and cap rockcombination. The carbon dioxide geological reserves can be approximately about501.05×10~8t,in all oil-gas fields and deep salty water aquifers within the depth rangeof 1500m~6500m. 2,Carbon dioxide geological storage potential in Tarim Basin mainly distributed in the Northern Downwarped and the Central Uplift, the reserves accounts for 56% of the whole basin. Although the area of Kuche Depression and Northern Uplift is small, the reservoir develops well, the petrophysical is more appropriate, the reserves accounts for 33.9%; the reservoir distribution of Southwest Downwarped and Southeast Area is less, the reservoir develops badly, the carbon dioxide reserves is relatively less.3,The carbon dioxide geological reservoir in Tarim Basin mainly distributed in the carbonate rocks and clastic rocks. The depth of carbonate reservoir is deeper. It's petrophysical relatively poor, the average porosity is generally in 10%.The rock porosity,caves and crack developed well, and the uniformity is poorer, but the storage body space is large; The clastic reservoir is shallower. Its petrophysical is relatively well, the average porosity general at 20% and the rock permeability is better. So the carbonate and clastic reservoirs developed in Tarim Basin are suitable for carbon dioxide geological storage, especially, the clastic reservoir is relatively well.