【摘要】 热-流-固耦合问题涉及许多领域,诸如石油热力开发领域中的渗流问题,孔隙介质中的渗流场、温度场以及岩石变形场之间就存在着复杂的耦合作用。该文首先建立了热-流-固多场完全耦合渗流数学模型,研究了全耦合偏微分方程组的求解方法,然后采用有限体积法和有限元方法相结合的数值模拟方法对耦合数学模型进行了求解,通过砂土固结算例验证了耦合模型及求解方法的正确性,最后作为应用实例,利用所建立的热-流-固耦合渗流数值计算模型对油页岩原位加热开发的渗流过程进行了数值分析。更多还原

【Abstract】 Thermal-hydrological-mechanical coupling issue involves many areas. According to the seepage problem in thermal oil recovery filed, there are complex coupling actions between seepage field, temperature field and deformation field. In this paper, a thermo-hydro-mechanical multi-field coupling model is developed and the solving method for fully-coupled partial differential equations is obtained. The numerical model is solved by combining the finite volume method and the finite element method. The calculated results for consolidation of a sand column are compared with other researchers’ solutions and good agreements are achieved. Finally, as an example, based on the thermal-hydrological-mechanical coupling calculation model, a numerical analysis is given for the seepage process of in-situ heating upgrading of oil shale.更多还原