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1982年8月,我部队在四川甘孜地区施工了一个地热钻孔,孔深120.92米.钻进过程中测定地下水温最高40℃,抽水试验时水温为70℃.在永久性止水24小时后,即喷出热水(汽),高度达19米,水温为90℃(相当当地的沸点),孔底为116℃,自流量为172.8吨/日.继而进行成井,圆满地完成了一个地热井的钻井、成井全过程. 这个孔之所以成功,主要是由于止水孔段判断选择正确,止水工艺合理. 1.止水孔段的选择抽水试验结束后,必须确定止水孔段的部位.第一步是通过全孔岩芯判断,孔深0～15.96米为含砾石、碎石的亚粘
In August 1982, our army constructed a geothermal borehole in the Ganzi area of Sichuan Province with a hole depth of 120.92 meters. The groundwater temperature was measured at 40 ° C during drilling and at 70 ° C during the pumping test. After 24 hours of permanent water stop , That is, hot water (steam) is discharged at a height of 19 meters and a water temperature of 90 ° C (fairly local boiling point), with a bottom hole of 116 ° C and a self-flow rate of 172.8 tons / day. Well drilling, the whole process into the well.The success of this hole, mainly due to the decision to select the correct water stop hole, stop water process is reasonable 1. Sewage water hole selection After the pumping test, you must determine the water hole section Part of the first step is to determine the full hole core, hole depth of 0 ~ 15.96 meters for gravel, gravel sub-viscous