Hydrogeochemical and isotopic evidence for trans-formational flow in a sedimentary basin:Implications for CO2 storage
作者单位：Key Laboratory of Engineering GeomechanicsInstitute of Geology and GeophysicsChinese Academy of Sciences Key Laboratory of Groundwater Resources and EnvironmentMinistry of EducationJilin University Key Laboratory of Engineering Geomechanics.Institute of Geology and GeophysicsChinese Academy of Sciences Tianjin Geothermal Exploration and Development-Designing Institute School of GeosciencesChina University of Petroleum(East China)
会议名称：《中国科学院地质与地球物理研究所2013年度（第13届）学术年会》
会议日期：2014年
学科分类：070902[理学-地球化学] 081803[工学-地质工程] 0709[理学-地质学] 07[理学] 08[工学] 0818[工学-地质资源与地质工程]
基 金：provided by China National HighTech R&D(863) Program(Grant 2008AA062303)
摘 要：Deep saline aquifers are considered as the most promising option for geologic disposal of *** of the main concerns,however,is the integrity of the caprocks between and above the storage ***, a hydrogeochemical and isotopic investigation is presented,using ionic chemistry,stable isotopes(δO,δH and Sr/Sr) and radiocarbon dating,on five saline aquifers on a regional scale,namely:Neogene Minghuazhen,Guantao,Ordivician,Cambrian and Precambrian,all found in the Bohai Bay Basin(BBB) in North *** recharge,flow pattern,age and mixing processes in the saline aquifers show that the Neogene Guantao Formation(Ng) in thejizhong and Huanghua Depressions on both of the west and east sides of the Cangxian Uplift is a prospective reservoir for CO sequestration,with a well confined regional seal above,which is the clayey layers in the Neogene Minghuazhen Formation(Nm).However, this is not the case in the Cangxian Uplift,where the Ng is missing where structural high and fault zones are developed,creating strong hydraulic connections and trans-formational flow to the Nm *** storage capacity and long-term security between the various hydrogeologic units,the depressions are better candidate sites for CO sequestration in the BBB.