中文摘要：

统计分析了沾化凹陷东北部地区地层水的矿化度、水化学类型和化学系数变化特征,讨论了影响地层水化学性质的因素及地层水成因。研究表明,地层水矿化度随深度减小,化学系数随深度增大;沙河街组以低矿化度NaHCO3型地层水为主,东营组和馆陶组以较高矿化度CaCl2型地层水为主。低矿化度NaHCO3型地层水是长石高岭土化作用的结果,高矿化度CaCl2型地层水成因是斜长石的钠长石化。

英文摘要：

Based on test data,the characteristics of formation water types in northeastern area,Zhanhua Depression,the totally dissolved solid（TDS） and their chemical coefficients are discussed,while the genesis of the formation water is analyzed in the paper.The results show that the water in Shahejie Formation is predominantly NaHCO3 type with low TDS,CaCl2-dominanted water with high TDS occurs in Dongying and Guantao formations.As a whole,TDS decreases with its burial-depth in the study area,and in contrast,the chemical coefficients increase with the depth.The genesises of NaHCO3 type and CaCl2 type water are due to kaolinization of feldspar and albitization of plagioclase,respectively.