The effect of injection speed on the law of heavy oil initiation and seepage flow research

In order to make the heavy oil flow, the repulsion pressure gradient should be larger than the start-up pressure gradient. The results show that the smaller the injection speed is, the smaller the start pressure gradient is, and the subsequent seepage process has a smaller and smoother replacement pressure gradient, and there is an effective limit of the start pressure gradient. Using the non-stationary method to calculate the relative oil-water permeability and water saturation, the bound water saturation does not differ much with increasing injection speed, and the residual oil saturation increases. Therefore, in order to start the heavy oil more easily in the mine production can be started at a lower production rate, the study of injection speed is important for the heavy oil start-up and development effect.