天津市深层基岩地下热水系统数值模拟中若干问题的处理

Treatment of Some Problems in Numerical Modeling of Geothermal Water System in Deep-Seated Basement Rocks near Tianjin

天津市基岩地下热水具有密度随温度变化显著、存在水岩之间热交换的特点 ,采用适合于描述深层地下热水水流和热量运移的压力场和温度场控制方程 ,通过对渗流场、边界条件的合理概化和对初始条件、热储层缺失区域及倾斜断层等的合理处理 ,使所建立的三维数值模型变得更为有效和实用 .

Geothermal water in the basement aquifers near Tianjin is characterized by a significant change in density of the water with its temperature and an exchange of heat between the water and its surrounding rocks. This paper puts forward the governing equations of pressure and temperature for describing water flow and heat transport of the deep seated geothermal system. The 3 dimensional numerical model established are proved more effective and practical by the reasonable generalization and treatment of the flow domain, boundary and initial conditions, missing areas of the aquifers, and tilted faults.