Geothermal Resource Characteristics And Evaluation In Chenggong New District, Kunmin

Kunming basin is rich in low temperature geothermal resources,through more than 30 years of geothermal geology exploration and research,has basically identified the geological conditions of Kunming geothermal field.Due to the limitation of exploration and development layout,different section of the research degree of obvious differences:Kunming old town and its surrounding have high degree of exploration and production,accordingly its research degree is high;Low study in Chenggong New Area,which located in the southeast of Kunming.And with the accelerated development of Chenggong New Area,developing geothermal resources locally is quite urgent.Geothermal resources census work in Chenggong New Area,finding the burial condition of the geothermal resources,determine the geothermal field boundary,estimate the geothermal field of geothermal resources,and for reasonable exploitation and utilization of geothermal resources to provide basic data in the region.On the basis of this paper,the results have been analyzed data on 1:10000 geothermal geological surveys and comprehensive hydrogeological drilling geophysical well logging,pumping tests,groundwater dynamic monitoring,identification of sample collection and analysis,and other methods to carry out a comprehensive analysis of the investigation and evaluation the work.Focus on identifying geothermal reservoir burial conditions,the type of geothermal reservoir structure characteristics,calculation and evaluation of geothermal resources in the amount,and then carry out the development and utilization of geothermal resources in the environmental impact assessment.The main conclusions are as follows:1,According to the results of the latest data ZK2(Wanxichong Geothermal Well)thought that Toushantou Fm(Z2d)formation is the good heat storage layer in this region too,the base layer is Nantuo Fm(Z2n)and Chengjiang Fm(Z1c).2,According to the geothermal gradient and heat storage layer temperature as a prerequisite,with the relationship between structure and burial depth,he relationship between the depth and exploitation conditions,the area of the geothermal field is 19.56 square kilometers,can be divided into two geothermal block segment.According to"Geothermal Resources Geological Survey standard" criteria for the classification(GB/T11615-2010)in geothermal exploration type,the geothermal type of section I block is divided into II-2 type,namely by tectonic fault-controlled strip-type low-temperature geothermal fields,the geothermal type of section II block is divided into II-3 type,that both the layered heat storage and heat storage characteristics of the strip low-temperature geothermal fields.That is low-temperature geothermal field which both have the layered and strip heat storage characteristics.3,On the basis of one-time energy,calculated the elastic resources using the volume within the Geothermal block segment and 20%of available resources and maximum drawdown inflow,the results obtained were as follows:amount of elastic hot water storage of Yunnan Normal University geothermal block segment is 21.43 million cubic meters,20%recoverable reserves is 4.2865 million cubic meters;amount of elastic hot water storage of Wanxichong geothermal block segment is 4.095 million cubic meters,20%recoverable reserves is 0.8189 million cubic meters.The maximum possible water inflow of Yunnan Normal University geothermal well is 2562 cubic meters per day,heat is 0.2896TJ/d,heat off coal is 9.882t/d,heat off electrical is 80447kw.h/d;The maximum possible water inflow of Wanxichong geothermal well is 2153 cubic meters per day,heat is 0.3425TJ/d,heat off coal is 11.686t/d,heat off electrical is 95135 kw.h/d.