传递用于描述油藏驱油过程的理论基础

The physical foundation for describing reservoir oil displacement process with exergy transfer

油气运移动力学中流体势可表征被驱流体的综合动力,其概念可将油气的运移、聚集和散失统一起来。渗流力学将油气运移过程视为宏观上均一的多相流动过程,可由达西定律表达力与运动速度之间的关系。在此基础上,深入探讨了传递对驱油过程的物理释义,从流动趋势、驱动能力及驱动速度等方面说明传递契合了油气运移动力学与渗流力学的相关理论。最后阐述了基于传递原理的多场协同驱油机理,具有清晰、简洁而又能恰当反映实际过程的特点,说明了传递用于描述驱油过程是合理和必要的。

In oil and gas transport dynamics the fluid potential can characterize the comprehensive driving force of the driven fluid, its concept can unify transport, accumulation and dissipation of oil and gas. In seepage mechanics the transport process of oil and gas was seen as homogeneous multi - phase flow process in macroscopical scale, and the re- lation between force and motion velocity was.expressed by I）arcy Law. On the basis of above, the physical explanation of exergy transfer to oil displacement process was deeply discussed. It was illuminated that exergy transfer corresponds to the related theory o＇f oil and gas transport dynamics and seepage mechanics from the points of flow potential, driving ability and driving velocity. Finally, the oil displacement mechanism of multi - field synergy based on exergy transfer theory was described, which is clear, succinct and can felicitously reflect practical process, thus it is showed that using exergy transfer to describe oil displacement process is reasonable and necessary.