Simulated core of oil field high capacity channel, shutoff test thereof, and flooding test thereof

Abstract

The invention provides a simulated core of an oil field high capacity channel, a shutoff test thereof, and a flooding test thereof. The simulated core comprises a substrate core. The injection end of the substrate core is provided with a borehole along an axis direction. The borehole is filled with sand. The shutoff test and the flooding test are carried out through the above simulated core. According to the simulated core, the condition of forming a high capacity channel in a near wellbore area and the development degree of the high capacity channel can be accurately simulated, and thus the contrast of the substrate core and the high capacity channel is good.

Description

Technical field [0001] The invention relates to a simulated core of a large pore channel in an oil field reservoir and its plugging test and oil displacement test. Background technique [0002] After the oilfield development enters the medium-high water cut period, the existence of high-permeability bands and large pore channels makes the injected water inefficient or ineffective circulation, which seriously affects the waterflooding development effect. In order to prevent fingering and channeling of the injected water, water shutoff is required Profile control technology. At present, there are many types of plugging control agents, but there are few physical models that simulate formations with high permeability bands and large pores. The existing quartz sand epoxy resin cementing model cannot accurately simulate the formation of large pores near the wellbore due to factors such as the cementing method and permeability distribution; the sand-filled pipe model has poor repeatabi...

AI Technical Summary

Problems solved by technology

Due to factors such as cementation mode and permeability distribution, the existing quartz sand epoxy resin cementation model cannot accurately simulate the formation of large pores near the wellbore; the sand-packed pipe model has poor repeatability, and the permeability is difficult to control. The slab sand filling model can only dynamically reflect the sand production situation but cannot accurately calculate the plugging rate; the 3D heterogeneous model cannot truly simulate the generation of large pores and cannot accurately calculate the plugging rate

Using the above-mentioned experimental model to evaluate the performance index of the plugging agent, there are certain errors

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