重庆红层地区机井使用功能退化调查与分析

重庆市红层机井为在侏罗系上统蓬莱镇组至下统珍珠冲组的一套红色地层通过钻进成井的民用水井，解决了重庆红层地区人们用水难问题。然而成井后机井的使用和维护却成为后续难题，部分机井使用功能逐渐退化。本文通过对重庆市红层机井使用功能的调查与分析得知，在机井成井两年后，部分机井将出现使用功能退化，如井底沉沙淤泥、水量减小、水质浑浊、井台护壁管破坏、水位下降、井壁垮塌堵塞等。随时间增长，机井使用功能退化加剧，采取有效的洗井和维护措施可增大机井的出水量和优化水质，提升机井的使用功能。

ANALYSIS ON USING FUNCTION DEGRADATION OF PUMPED WELLS IN CHONGQING RED LAYERS AREA

Red layer pumped well in Chongqing is drilled in the red strata area of Penglai Formation to Zhenzhuchong Formation of Jurassic. It solved the difficulties of getting water for the people that lived in Chongqing red layer area. But the new problem of use and maintenance of pumped well is coming out after that. The function of some pumped well is gradually degradation. Through the investigation and analysis of pumped well in Chongqing red layer area, this paper found that after two years of the pumped well built, the function of some pumped wells is going to degrade. Such as with heavy sand and silt at the bottom of well, the water volume decreased, turbid water, the protective pip destroyed, water level falls and the well wall collapse and jam the well, et al. Growth over time, the function of pumped well degrades sharply. Taking effective well washing and maintenance measures can increase the water volume and improve the water quality. It can promote the using function.