Profile control and flooding process method based on combination of gel and in-layer generated gas

Abstract

The invention discloses a profile control and flooding process method based on combination of gel and in-layer generated gas. The process method includes the steps of optimally selecting out a gel system formula, an in-layer gas generation system formula and an on-site aerogel injection combination scheme which are suitable for a target oil field; determining the number of demanded liquid storagetanks and injection pumps, and linking the liquid storage tanks containing chemical agents and the injection pumps into a water injection flow; injecting high-viscosity gel system component segmentation plugs; injecting low-viscosity gel system component segmentation plugs to achieve combination of the gel high-viscosity segmentation plugs and the gel low-viscosity segmentation plugs; injecting in-layer gas generation system component segmentation plugs to achieve combination of the in-layer generated gas and the gel; repeating the steps above to achieve the combination of the in-layer generated gas and gel multi-segment plugs, wherein when the in-layer generated gas encounters the gel, gel bubbles are formed; injecting the high-viscosity gel system component segmentation plugs. Besides figuring out how to inject each component in a profile control and flooding system based on combination of the gel and the in-layer generated gas on site in order to fully exert the functions of all thecomponents, the method can also has the advantages that through the combination of all the components, the functions are enhanced, and the synergistic effect is improved.

Description

technical field [0001] The invention belongs to the technical field of petroleum exploitation, and more specifically relates to a combined regulating and flooding process of jelly and intralayer gas. 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 of injected water during the water flooding process. , causing the water cut of the oil well to rise and affecting the development effect. At present, the technical countermeasures to improve this phenomenon include: weak jelly control and flooding, nitrogen foam control and flooding, nano-microspheres and other control and flooding technologies. These technologies can improve reservoir development effects to varying degrees. From the analysis of their field application effects, the above-mentioned control and flood...

AI Technical Summary

Problems solved by technology

These technologies can improve reservoir development effects to varying degrees. From the analysis of their field application effects, the above-mentioned control and flooding systems have certain limitations to varying degrees: some control and flooding systems have weak plugging strength, and some The system is difficult to inject, cannot migrate deep into the formation, some control and drive systems have limited radius of action, some control and drive systems have poor stability, and some control and drive systems can only adapt to medium and low permeability oil layers; most of the above control and drive systems are single systems , each has its own emphasis on plugging strength, improvement of mobility ratio and deep migration, etc., and the effect of control and flooding is not good

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