鄂尔多斯盆地山西组地下咸水CO_2溶解能力  

CO_2 Solubility in Shanxi Formation Water of Ordos Basin

作　　者：胡丽莎[1] 常春[1] 于青春[1] 

机构地区：[1]中国地质大学水资源与环境学院,北京100083

出　　处：《地球科学（中国地质大学学报）》2012年第2期301-306,共6页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金项目(No.40772208);中央高校基本科研业务基金(No.2011YYL147)

摘　　要：实施CO2的地质储存是目前公认的减缓全球变暖的有效途径之一.潜在的储存场所包括衰竭的油气藏、深部不可开采煤层及深部咸水层.其中,深部咸水层储存潜力最大.在发挥作用的诸多机理中,溶解埋存具有埋存量大、作用时间较长以及安全性高的特点.在评价深部咸水含水层CO2溶解储存潜力时,溶解度是一个关键参数.提出了测定咸水含水层地层水CO2溶解度的方法,并将其实际应用于鄂尔多斯盆地山西组地层水.鄂尔多斯盆地是我国重要的能源基地,CO2排放量大,排放浓度高.采集了野外实地水样,进行了化学成分分析,并人工合成该水样;测定了40～80℃、8～12MPa条件下CO2在该水样中的溶解度,其结果可为评价鄂尔多斯盆地深部咸水含水层埋存能力提供依据.Geological storage is one of the most effective means to reduce the anthropogenic greenhouse gas emissions to mitigate the worsening global warming.Depleted oil-gas reservoirs,coal seams and deep saline aquifers are potential sites for CO2 geological storage of which saline aquifer has the greatest potential for sequestration.Among the many effective mechanisms,dissolving storage is characterized by large storage capacity,long action time and high safety.When evaluating the storage capacity of a deep saline aquifer,CO2 solubility becomes a key parameter.In this paper,an experimental method is proposed and used to measure the CO2 solubility in Shanxi Formation water.Ordos Basin is an important energy base for China which releases a lot of high concentration CO2.Studies show CO2 geological storage is possible in Ordos Basin since its Shanxi Formation forms many source-reservoir-cap assemblages,and it is of great importance both in theory and practice to probe into CO2 solubility in Shanxi Formation water of Ordos Basin.In this paper,chemical composition of Shanxi Formation water collected from the Ordos Basin were analyzed.CO2 solubilities in the artificial synthetic Shanxi Formation waterwere measured at 40-80 ℃,8-12 MPa pressure.The results can be used for the evaluation of the CO2 storage capacity in deep saline aquifer of Ordos Basin.

关 键 词：地质储存 鄂尔多斯盆地 溶解能力 地下水 水文地质学 

分 类 号：X143[环境科学与工程—环境科学]