沁水盆地煤层气井产出水化学特征与产能关系研究  

Relationship between water chemical composition and production of coalbed methane wells,Qinshui basin

作　　者：李忠城[1] 唐书恒[1] 王晓锋[1] 郑贵强[1] 朱卫平[1] 王珊珊[1] 张静平[1] 

机构地区：[1]中国地质大学能源学院,北京100083

出　　处：《中国矿业大学学报》2011年第3期424-429,共6页Journal of China University of Mining & Technology

基　　金：国家重点基础研究发展计划(973)项目(2009CB219604);国家科技重大专项(2008ZX05034-003;2008ZX05039-003)

摘　　要：以沁水盆地枣园区块煤层气井产出水的分析测试数据为依据,利用统计、对比方法,系统研究了煤层气井产出水化学成份特征、类型、成因机理及其与煤层气井产能的关系.根据水化学成份变化规律将产水过程分为3个阶段,即污染成份大量排出阶段、过渡阶段和稳定阶段,分析产出水具有富集碳酸氢根离子、缺少硫酸根离子和钙镁二价阳离子的特征及成因机理.结果表明:在相近的产水量条件下,水的矿化度、碳酸氢根离子浓度越高,煤层气井的气产量越高;当产出水矿化度低于1 000 mg/L、碳酸氢根离子浓度低于600 mg/L时,基本不产气.利用煤层气井产出水化学特征的分析成果可以进行煤层气井产能的合理预测.Based on the analysis of water produced from the coalbed methane（CBM） wells of Zaoyuan district in Qinshui basin,the chemical composition,forming mechanism of water andthe correlation with the production of CBM wells were systematically studied by the statistical and antithesis method.According to the variation of chemical composition,the process of producing water from the CBM wells can be divided into three stages,namely;the discharging phase which largely contribute to environmental pollution,the transitional phase and the stable stage.It is presented that the produced water is characterized by the enriched bicarbonate ions,and low or lack of sulfate,bivalent cationic calcium and magnesium.The results show a high total dissolved solids（TDS）and bicarbonate ions concentration in the water,and a large gas production under the same water-yielding condition.In addition,little gas is produced when TDS and bicarbonate are less than 1 000 mg/L and 600 mg/L respectively.Basically,the water chemistry analysis results can reasonably be used to predict the production of the CBM wells.

关 键 词：煤层气井产出水 水化学成分 矿化度 碳酸氢根 煤层气产量 

分 类 号：TP028.8[自动化与计算机技术]