Available conditions for geological storage of CO2 in deep saline aquifers,Junggar Basin
The geological storage of carbon dioxide(CO2)in deep saline aquifers is the most promising technology to reduce carbon emission and achieve the carbon-neutrality goal.So,in an effort to thoroughly evaluate such storage in Junggar Basin,some data of faults,earthquake events,drilling and well test,and formation water in this basin were employed to assess storage conditions in each block and stratum from six aspects of regional geology,tectonic evolution,faulting or earthquake activities,geotemperature,formation water,and reservoir-caprock assemblage.Results show that,(i)Mesozoic Cretaceous to Jurassic systems,as the main strata,are avail-able for this storage in Junggar Basin;(ii)eastern and central basin is not prone to faulting or earthquake activities,which may ensure the storage in security;(iii)the overall geothermal conditions are favorable for such geological storage;(iv)both Cretaceous strata and saline aquifers in eastern and central basin are the best suitable storage places;and(v)some reservoirs of the Cretaceous Qingshuihe Formation and the Jurassic Sangonghe and Badaowan formations and their overlying strata,are conducted as the most perfect reserv-ior-caprock assemblage for this storage.It is concluded that many eligible circumstances,such as buried depth of three reservoir-cap-rock assemblages and relevant lithology,reservoir thickness,caprock closure,make the CO2 geological storage in the long-term devel-opment in Junggar Basin possible.
Junggar BasinDeep saline aquiferGeological condition of CO2 storageStorage potential
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