长宁页岩气开发区水文地质条件及地下水环境保护

Hydrogeological Condition and Groundwater Environment Protection in the Changning Shale Gas Development Zone

页岩气开发中地下水环境保护尤为重要。通过对长宁地区的水文地质条件调查,识别了区内地下水的含水岩组、地下水类型、岩溶地下水系统和敏感目标。通过重点井场周边的地下水监测,表明该地区目前地下水环境质量总体良好,并未发现与页岩气开发相关的地下水污染,该数据可作为页岩气开发区的地下水水质基线数据。结合开发区内的水文地质条件及页岩气开发工程特点,建议应从井场选址、施工工艺控制、地面物料管控、全过程监测等方面着手加强地下水环境的保护工作。

Groundwater environmental protection is particularly important in shale gas development.This study identifies water-bearing formation,groundwater type,karst groundwater system and sensitive target in the Changning shale gas development zone by hydrogeological survey.The study indicates that generally,quality of groundwater environment is good without groundwater pollution in the same region.A suggestion on strengthening groundwater environment protection based on selection of well site,construction technology control,surface material control and monitoring work is made.