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水气交替注入和水气混注能提高波及系数。因此,水和气混注能够提高衰竭式油藏的采收率。相对于水气交替注入方式来说对水气混注方式了解的不多,本文主要研究的是影响混相水气混注驱油的因素。本文使用油藏数值模拟方法,以固定比例分别注入水和气到两口水平井中。为了得到更好的波及效率并且增加在水气分离前运移的距离,气体注入到油藏的底部。测试了不同位置的注入水效果。还有储层纵向渗透率对储层波及系数和原油采收率的影响。
Alternate water vapor injection and water-gas mixing can improve the sweep coefficient. As a result, water and gas mixing can increase oil recovery in depleted reservoirs. Relative to the way of alternating water and gas injection is not much understanding of water and gas mixing method, this paper is mainly studied the impact of mixed-phase oil and gas mixing oil displacement factors. In this paper, reservoir numerical simulation is used to inject water and gas into two horizontal wells at a fixed ratio respectively. In order to get better sweep efficiency and increase the distance traveled before the water vapor separation, the gas is injected into the bottom of the reservoir. Tested the effect of water injection at different locations. There is also the effect of reservoir longitudinal permeability on reservoir runoff and oil recovery.