Analysis of Geothermal Characteristics of JZ02 Well in Langgu Sag
The development potential of geothermal resources in Langgu Depression is enormous,and studying its thermal reservoir characteristics and reservoir formation mechanism can provide a basis for subsequent development and utilization.By studying and analyzing the geothermal geological conditions,hydrochemical characteristics,and pumping and reinjection tests of the JZ02 geothermal well thermal reservoir,the source of geothermal water supply was determined,and the genesis mechanism of geothermal water was analyzed.The results indicate that the karst fractures in the carbonate thermal reservoir of the geothermal well are not well-developed,exhibiting characteristics of low permeability and high thermal conductivity.The geothermal gradient of the thermal reservoir is relatively low,only 1.00℃/100m.At the same time,the heat flux value of the earth also shows the characteristic of low values in depressed areas,and the hydrochemical type is HCO3—Na;The atmospheric precipitation in Taihang Mountains and Yanshan Mountains,after being supplied with runoff,infiltrates deep strata through the Daxing Fault Zone and is continuously heated by deep geothermal and rock radioactive heat generation.The fault zone provides a channel for the upward circulation of deep heat sources,and carbonate thermal storage forms a good insulation cover layer for the Cenozoic sandstone and mudstone strata covering it.
carbonate rock thermal storageaccumulation mechanismLanggu sag
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