中文摘要：

沁水煤层气田枣园区块煤层气开采井产出的水具有高盐度、高矿化度的特点,直接排放可能会造成生态环境的破坏.通过连续跟踪采集枣园区块煤层气井产出水样品,并进行了25 项物理化学参数的系统测试,分析了矿化度及各种阴、阳离子的动态变化规律.发现其矿化度、氯离子、钠离子浓度均呈现先高后低的变化趋势,而碳酸氢根离子的变化规律相反,呈现先低后高的特点.水化学类型呈现由Cl-Na 型向Cl.HCO3-Na 型和HCO3.Cl-Na 型变化的规律.产出水中阳离子以K^＋＋Na^＋离子为主,阴离子HCO3. 和Cl–值较为接近,不存在明显占绝对优势的离子.依据产出水中各离子的变化特点,依据国家Ⅱ类地表水标准,采用回归分析方法,建立了氯离子浓度排采动态变化模型.研究成果为煤层气井产出水处理技术提供了依据.

英文摘要：

The produced water from CBM well in Zaoyuan block of Qinshui CBM field is characteriaed by highsalinity and high mineralization. direct discharge may damage the ecologic environments. Based on the continuoustracking collection of the produced water samples of CBM wells and the systematically testing 25 physical andchemical parameters, the dynamic changes of the salinity and various anions and cations were analyzed. The resultsshow that the concentration of salinity, chloride ion and sodium ion change from high to low, but the concentrationof bicarbonate ion changes conversely with the trend from low to high. The water changes from Cl-ype to Cl·HCO3-a type and HCO3·Cl-Na type. The cations are mainly K^＋ and Na^＋ ions, and there is no obvious dominantanions, HCO3^- and Cl^- alues are close in the produced water. According to the changes of the ions, themodel of chloride ion concentration in the water was established using nonlinear regression analysis.