A combination control and flooding method of self-gas and glue in the layer

Abstract

The invention discloses an in-layer authigenic gas and gel combined profile control and flooding method. The method comprises the steps that an authigenic gas formula system and a gel formula system which are suitable for a target oil field are preferably selected; according to the channeling situation, the development situation, the injection amount per day, the injection pressure and the crude oil viscosity of a target reservoir, the combination mode of authigenic gas and gel is designed, the size of each slug is designed, and accordingly formula components in the slugs are determined correspondingly; the medium-high viscosity gel formula components are injected into the target reservoir; the low-viscosity gel formula components are injected into the target reservoir; the authigenic gas formula components are injected into the target reservoir; the steps are repeated, and the repeated time is determined according to the total injection amount and the size of each slug; and the medium-high viscosity gel formula components are injected into the target reservoir for insulating subsequent injected water. The in-layer authigenic gas and gel combined profile control and flooding method is based on the authigenic gas components and the gel components, besides the function of each components, the authigenic gas components and the gel components are combined to form a novel profile control and flooding system with the synergistic effect and adduction synergism, and thus the functions are strengthened.

Description

technical field [0001] The invention relates to the technical field of petroleum exploitation, and more specifically relates to a control and flooding method of intralayer self-gas and glue combination. Background technique [0002] In the process of oil field development, due to the strong heterogeneity of the reservoir, the high viscosity of crude oil, and the large water-oil mobility ratio, the injected water in the reservoir is prone to fingering and channeling channels during the water flooding process, resulting in oil well failure. The moisture content rises, affecting the development effect. At present, the countermeasures to improve this phenomenon include: weak gel control and flooding, nitrogen foam control and flooding, nanometer microsphere control and flooding, etc. These technologies can improve the reservoir development effect to varying degrees. From the analysis of their application effects, the above control and flooding systems have certain limitations t...

AI Technical Summary

Problems solved by technology

These technologies can improve the reservoir development effect to varying degrees. From the analysis of their application effects, the above control and flooding systems have certain limitations to varying degrees: some control and flooding systems have weak plugging strength, and some control and flooding systems have weak injection strength. It is difficult to migrate deep into the formation, some control and displacement systems have limited radius of action, some control and displacement systems have poor stability, and some control and displacement systems can only adapt to middle and low oil layers; at present, most of the above control and displacement systems are single systems, Intensity, improvement of mobility ratio, and deep migration all have their own emphasis, and the effect of control and drive is not good

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