碳酸盐岩酸化增产是地下多孔介质中反应性渗流的典型示例，是一种极其有效的提高采收率的技术，应用范围广泛。酸液在地层破裂压力下注入地层，以提高地层渗透率，同时绕过井筒周围的受损区域。本研究扩展了一个综合双尺度连续体模型，该模型考虑了质量、动量和能量的变化，用于研究复杂碳酸盐岩酸化增产系统中的酸化增产过程，并研究了裂缝和孔洞网络的发育情况。
引入改进的双尺度连续体模型模拟白云岩酸化增产过程，该模型由岩心尺度模型和孔隙尺度模型组成，在处理缝洞网络发育情况时，改进的双尺度连续体模型不需要进行大的修改。
Acid stimulation in carbonate rocks represents a classic example of reactive flow in subsurface porous media and is an extremely effective improved-oil-recovery technique with broad applications. The acid solution is injected into the formation under the formation fracture pressure to increase formation permeability while bypassing damaged domains around the wellbore. This work extends an integrated two-scale continuum model that contemplates mass, momentum, and energy changes to study the acid-stimulation process in complex carbonate acid-stimulation systems with the development of fracture and vug networks.
The improved two-scale continuum model, consisting of the core-scale model and pore-scale model, is introduced to simulate the acid-stimulation process in dolomite rock. When dealing with the development of fracture and vug networks, the improved two-scale continuum model does not require significant modification.
