Study on Application of Geothermal Well Gravel-filling Technology in Loose Rock Areas

Due to geological conditions of the construction, the deep geothermal wells in Leling, Qingyun and other regions, are easy to produce sand and other issues after long-term used, in order to prevent the geothermal wells being destroyed by sand production, based on previous experience of gravel-filling operation in Renqiu and other places, selecting a particle gradation and well structure reasonably can effectively prevents the occurrence of such events, therefore we applied gravel-filling technology in geothermal well drilling, and successfully abtained a good well completion quality