蒸汽热采中考虑温度场影响的流体渗流动力学模型

摘要

Steam thermal recovery is a typical non-isothermal process. It is very necessary to stimulate formation temperature field accurately, but the influence of temperature field on Darcy flow has not been considered before. According to fluid mechanics in porous medium and theories of thermodynamics, the mechanisms of interaction of the formation fluid migration and temperature variation are analyzed, a temperature-seepage double-field coupled continuous medium mathematical model is established, and moreover, the boundary condition and solving method of each field is discussed, all of which provides the theoretical evidence for the accurate stimulation of the spatial distribution pattern of each fluid in steam thermal recovery.%蒸汽热采是一个典型的非等温过程,正确模拟地层温度场是很有必要的,以前都没有考虑温度场对达西渗流的影响.根据多孔介质渗流力学和热力学理论,分析了地层流体的运移与温度变化之间相互作用的机理,建立了温度场和渗流场的双场耦合连续介质数学模型,并探讨了各场的边界条件及求解方法,为更准确模拟蒸汽热采各流体的空间分布规律提供了理论依据.