中国科学院大学学报2016，Vol.33Issue(4)：519-527,9.DOI:10.7523/j.issn.2095-6134.2016.04.013
杭锦旗地区地层水特征研究及其油气地质意义
Chemical characteristics of the formation water in Hangjinqi area and their petroleum and gas geological significance
摘要
Abstract
The relationship between chemical characteristic of formation water and preservation of gas reservoir has been discussed based on analysis of the chemical composition in Hangjinqi area.The vertical and plane variations in chemical characteristic parameters in Hangjinqi area in the north of Ordos basin.The results show that most of these formation waters with low pH value and high total dissolved solid (TDS) are calcium chloride IV-type and V-type waters.The plane distribution features show west-east differentiation and north-south dissimilitude.The high TDS and (rc1--rNa+)/rMg2+ values and the low rNa+/rc1-,(100 × rsod2 /rc1-),and (rHco3-+ rco32-)/rca2+ values in the west and local area of Boerjianghaizi fault indicate better sealing condition.The relatively positive correlation of the TDS and ion concentration with depth in the north and south of the Boerjianghaizi faulted zone indicates that the formation water exists in a closed fluid dynamic environment,which is beneficial to preservation of the natural gas.All the formation water-indicative sealed environments have natural gas discoveries,which indicates a good correlation between them.The water chemical characteristics provide clues to the natural gas prospects.关键词
地层水/水化学特征/封闭性/杭锦旗地区Key words
formation water/chemical characteristics/sealing condition/Hangjinqi area分类
能源科技引用本文复制引用
杨娅敏,赵桂萍,李良..杭锦旗地区地层水特征研究及其油气地质意义[J].中国科学院大学学报,2016,33(4):519-527,9.基金项目
中国科学院知识创新工程(Y225014EA2)和中石化华北分公司源项目(Y34101X1G2)资助 （Y225014EA2）
