油藏多孔介质渗流过程存在多场耦合作用,目前的一些研究方法和分析模型具有一定局限性.本文将不可逆热力学原理应用于油藏复杂渗流过程,在局域平衡和连续性假设基础上,提出了基于表征单元体(Representative Elementary Volume,简称REV)的元胞描述方法;推导出了多孔介质渗流过程考虑导热和扩散作用的耦合方程;基于所建模型,分析了稠油热采过程的熵产变化特性.稠油热采过程除包括热传导和扩散耦合作用外,还包括黏滞流动和化学反应等不可逆过程,可根据本文模型扩展.
Reservoir porous media seepage process exists many fields coupling effect,some current research methods and analyses model have some limitations.In this paper,the irreversible thermodynamics principle was applied to complex reservoir seepage process,on the basis of local equilibrium and continuity assumption,is presented based on the representative elementary volume (REV) description method of cellular automata; Porous media seepage equations were deduced considering coupling of heat conduction and diffusion effect; Based on the model,the paper analyzes the entropy production change characteristics of heavy oil thermal recovery process.Heavy oil thermal recovery process includes irreversible process of viscous flow and chemical reaction process and besides heat conduction and diffusion coupling effect,according to this model extension.Reservoir pouous media seepage process exists many filds coul.
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