天然场音频大地电磁法在云南省普洒河花岗岩区地热水资源勘查中的应用成果

Application of nature field audio magnetotellurics to the geothermal water resources exploration in the granite region of Pusahe,Yunnan

在云南省个旧市普洒河花岗岩分布区开展物探天然场音频大地电磁法勘查,结合该区地热地质情况,确定了1口地热水资源勘查井的井位和井深,设计井深600 m,钻进至601.88 m终孔,成功揭露到地热水含水层,具承压性,水温39℃,自流量655 m^(3)/d;基本查明了区内地热水储水断裂(裂隙)破碎带的空间分布情况,属带状热储;对该井地热水自流的成因进行了分析和判断,取得了很好的地热水资源勘查成果.

In Pusahe granite region of Gejiu County,Yunnan Province,nature field audio magnetotellurics exploration was carried out.Combined with the geothermal geological condition,a geothermal well location and depth were determined.The design depth of the well was 600 m,and the hole which successfully revealed the geothermal water was drilled to 601.88 m.The aquifer was confined,water temperature was 39℃,and the artesian water flow was 655 m^(3)/d.Using nature field audio magnetotellurics method,we basically ascertained the spatial distribution of the geothermal water storage fracture(fissure)zone as zoned reservoir,and also analyzed causes of the artesian water,and achieved success in geothermal water resources exploration.