Characteristics of Geothermal Reservoir and Fluid Chemical Characteristics of Guantao Formation in Northwestern Shandong Province
The geothermal reservoir in the geothermal area of northwestern Shandong is mainly a layered geothermal reservoir,the ground temperature is uniform relative to other geothermal areas,and it has a high heat flow value and a strong water-rich water-bearing layer,it is the area with the greatest potential for geothermal resource development in Shandong Province.One of the main thermal reservoirs in northwestern Shandong is the pore-fissure thermal reservoir group of the Neogene Guantao Formation.This study found that the upper strata deposit by fine-medium sandstone,mud-stone and fine sandstone interbedded siltstone;the lower strata deposit medium-fine sandstone,medium sandstone and glutenite with mudstone;The thermal reservoir of Guantao Formation in Neogene has the law that the buried depth of roof and floor changes from shallow to deep from south to north,and the thickness changes from thin to thick.In the convex area,the buried depth is shallow and the thickness is thin,while in the depression area,the buried depth is deep and the thickness is large.The chemical characteristics of geothermal water have the following distribution characteristics in the horizontal direction:the hydrochemical type gradually chang from SO4·Cl-Na type in the south and southeast to Cl·SO4-Na type and Cl-Na type in the north and northwest.
Guantao Formation thermal reservoirhydrochemical characteristicsground temperature zoningnorthwest of Shandong Province
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