贵阳安井-新添寨地热田初步研究

2 0 0 1年 1月在贵阳市郊新 1号井打出一口 58℃、流量 160 0m3/d的高温热矿水 ,证明贵阳市东北郊存在一热储构造面积至少 8km2 的地热田。热储构造与长期活动的地震断裂带及逆冲推覆构造有关 ,属传导对流型地热田。其主要隔热保温盖层为志留系高寨田群 (S1g)和奥陶系湄潭组 ( 0 1m)泥页岩 ,主要热储层为寒武娄山关群 (∈2 - 3ls)碳酸盐岩 ,根据地下热水水质化学成份特征及钻探资料 ,其深度为 130 0 - 2 50 0m ,地温梯度 2 4 4 - 2 84℃ /10 0m ;指出乌当背斜东翼倾伏端有另一地热田存在可能性 ;以及对地热田研究开发、保护的意见

A Primary Study on the Geothermal Field of Anjing-Xintianzai,Guiyang

New No.l,a mineral water well with a temperature of 58℃ and a discharge capacity of 1600 m3/d was drilled in the suburb of Guiyang City in January 2001.The thermal reservoir structure covers at least an area of 8 km.It is a conductive and convective type of geothermal field related to long-active seismic fractures and overthrust structures.The main heat-proof and temperature-preserving covers are Silurian and Ordovician argillite of Gaozaitian Formation and Meitan Formation.The main thermal reservoir layer is Cambrian carbonate rock of Loushanguan Group.The aquatic chemistry of the hot ground water and drilling data indicate that the reservoir depth ranges from 1300 to 2500m and the geothermal gradient from 2.44 to 2.84℃/100 m. It is pointed out that there may exist another geothermal field in the plunging part of the east limb of Wudang Anticline.Some suggestions are made about the development and protection of the geothermal field.