摘要
以沁水盆地柿庄南部煤层气井产出水的测试数据为依据,采用统计、对比方法,系统研究了3号煤和15号煤煤层气井产出水离子成分、矿化度及pH动态变化规律。结果发现,排采210d内3号煤煤层气井产出水水型基本保持不变,而15号煤煤层气井产出水类型变化较大,由Na·Mg-Cl型逐渐过渡为Na-HCO3·Cl型。通过分析3号煤和15号煤煤层气井产出水的矿化度变化规律及原因,将15号煤煤层气井产出水的矿化度划分为三个阶段,15号煤煤层气井产出水的pH受季节变化的影响较大,表现为夏季煤层气井产出水的pH值较低,说明受大气降水的影响较严重。
On the basis of CBM well produced water tested data in the Shizhuang south area, Qinshui Basin, using statistics and comparative methods, systematically studied ion composition, total dissolved solid and pH dynamic variation pattern of CBM well produced wa- ter from coal Nos.3 and 15. The result has found that during 210 days of drainage, water type of produced water from coal No.3 is basical- ly unchanged, while from coal No. 15 changed considerably, transited from Na-Mg-C1 type to Na-HCO3-C1 type gradually. Through analyses of TDS variation pattern and causation of well produced water from coal Nos.3 and 15, divided TDS of water from coal No. 15 into three stages, while the pH value is closely related to seasonal variation, appeared as rather low in summer, thus accounted for the im- pact from atmospheric precipitation.
出处
《中国煤炭地质》
2013年第9期25-29,共5页
Coal Geology of China
基金
国家科技重大专项课题(2011ZX05034-003)
国家自然科学基金项目(41272176)
关键词
煤层气井
产出水
化学特征
动态变化
柿庄南部
沁水盆地
CBM well
produced water
chemical characteristics
dynamic variation
Shizhuang south area
Qinshui Basin
