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稠油注蒸汽开采对储层有很大的伤害,造成了岩石矿物溶解、转化,同时注入汽携带了少量的固相颗粒进入储层,它们在孔道中运移造成孔喉堵塞。本文从矿物转化、微粒运移、粘土膨胀、润湿转变及乳化物堵塞等几个方面阐述储层损害机理,为下一步数值模拟储层伤害打下基础。
Heavy oil steam injection has caused great damage to the reservoir, resulting in the dissolution and transformation of rock minerals. At the same time, a small amount of solid particles are injected into the reservoir to entrap the steam, causing them to block in the pore channels. In this paper, the mechanism of reservoir damage is expounded from the aspects of mineral transformation, particle migration, clay swelling, wetting transition and emulsion blockage, which lays the foundation for the next step numerical simulation of reservoir damage.