Analysis of karst heat storage characteristics and development and utilization potential in Wentang area,Henan Province
In order to study the characteristics of deep karst heat reservoir resources in Wentang area,the spatial distribution,occurrence characteristics,geothermal field and hydrochemistry characteristics of deep karst heat reservoirs in Wentang area were systematically an-alyzed by means of exploration(geophysical prospecting,drilling),in-situ test(pumping-recharge test)and laboratory test(karst hot water chemistry and isotope sample analysis),and the quality of geothermal fluid and its development and utilization potential were eval-uated.The main conclusions of the study are as follows:karst thermal reservoirs in Wentang area are convective banded heat reservoirs(karst banded heat reservoirs)in the Cambrian tectonic fracture zone and convection-conduction mixed layered thermal reservoirs(karst layered thermal reservoirs)in the Cambrian fissure fracture fractures,which belong to low-temperature geothermal resources,the litholo-gy of thermal reservoirs is mainly limestone and dolomite of the Middle Cambrian Zhangxia Formation(∈2z)and the Upper Cambrian(∈ 3),and the fractured karst is developed,and the chemical types of geothermal water are mainly SO4·HCO3-Na·Ca、HCO3·SO4-Na type,fluorine content reaches the concentration of medical value,metasilicic acid content reaches the concentration of mineral water,and the recoverable heat of karst thermal fluid at a depth of 2 000 m is 1.60 x 1015 J/a,equivalent to 5.48 x 104 t/a of standard coal.The research results show that the deep karst thermal storage resources in Wentang area have great exploitation potential,which provides a reliable basis for the sustainable development and utilization of geothermal resources and the adjustment of energy structure in this area.
karst heat storageheat storage characteristicsdevelopment and utilization potentialWentang
万方数据
维普
