兰州—民和盆地地下热水资源潜力评估

通过对兰州—民和盆地地热地质条件综合研究,首次提出热储的概念模型,即地壳深部供热—深大断裂导热—低热导率岩层聚热—侧向地下径流补水。首次明确圈定地下热水资源远景区4处,并采用定量的方法估算出4个远景区的静态可采地下热水资源量热值为6 75×1012KJ(相当于2302 66万吨标准煤的能量)。其中兰州七里河远景区和水登咸水河远景区分别占可采总量的16 24%和77 87%,二者的资源潜力相对较大,具备较好的经济技术开发条件。

ASSESSMENT ON THE POTENTIALITY OF THE GEOTHERMAL WATER RESOURCES IN LANZHOU-MINHE BASIN

By comprehensive research on the geological conditions of the geothermal settings in Lanzhou-Minhe Basin,reservoir conceptual model,that is,deep crust providing thermal,deep big faults conducting thermal,low heat conductivity strata collecting thermal and ground runoff supplying water,is proposed for tne first time.Four prospective geothermal water resource areas are first clearly proposed and their calorific value of static minable geothermal water resource is es- timated by quantitative method.The value is 6.75×1012kilojoule which is equivalent to the ener- gy of 23,026,600 tons standard coal.The energy percentages of prospective areas of Qilihe of Lanzhou City and Xianshuihe of Yongdeng County are 16.24 and 77.87 respectively of the total minable.The resource potentialities of the two areas are relatively large and have better economic and technical exploit conditions.