沁水盆地南部山西组煤储层产出水氢氧同位素特征

水化学成分及特征对煤层气开发有重要指导意义。为研究沁水盆地南部柿庄南煤层气开发区块3号主采煤层的地下水径流与水化学特征，从该区采集了煤层气井排出水样，进行主要离子浓度及氢氧同位素测定，分析离子浓度与氢氧同位素的展布特征。同位素组成研究结果显示，3号煤层产出水均来自大气降水补给，表现出18O与D漂移的特点。研究区由东向西δD和δ18O值呈增大趋势，和Na+、K+、Cl-等离子浓度呈现出一定的正相关性，并与研究区由东向西水文径流区（氧化环境）到滞流区（还原环境）的过渡特征相符合，说明δD和δ18O值也可以作为判断煤层水径流条件与煤层气开发有利区的参考指标。 

Hydrogen-oxygen isotope characteristics of produced water from coal reservoir of Shanxi Formation in Qinshui basin

To study the groundwater runoff and water chemistry characteristics of the primary minable seam No.3 of coal reservoir in Shanxi Formation in the southern block of Shizhuang, southern Qinshui basin, this paper collected water samples from coalbed methane wells in the south of Shizhuang block. The characteristics of ion concentration and hydrogen-oxygen isotope are determined to analyze the distribution characteristics of ion concentration and isotope. The results show that the produced water from seam No.3 was supplied from atmospheric precipitation and was also characterized by 18O and D drift. δD and δ18O which increased from the east to the west, presented a positive correlation with ion concentration, which was consistent with the characteristics of the transition from runoff area to residence area in the study area. δD and δ18O can be used as effective exploration tool in judging the runoff conditions and evaluating exploration target.