Environment-friendly supramolecular injection enhancer and preparation method thereof

Abstract

An environment-friendly supramolecular injection enhancer is disclosed. The injection enhancer comprises, by weight, 20%-25% of a descaling agent, 0.5%-1% of a surfactant, 0.5%-1% of a penetrant, 1%-2% of a stabilizer, 20%-30% of a miscible forming agent and 40%-60% of a solvent, wherein the descaling agent is composed of a chelating agent and an anti-scaling agent, the ratio of the chelating agent to the anti-scaling agent is 1:1, the surfactant is an ampholytic surfactant, the miscible forming agent is precious metal nanoparticles wrapped by glucan, and the solvent is a polar solvent. The invention also discloses a preparation method of the injection enhancer. The formation permeability and the crude oil fluidity are improved through the injection enhancer, and the effect of improving the oil and gas yield is achieved by improving the oil well production rate.

Description

technical field

[0001] The invention relates to the field of depressurization of water injection wells, in particular to an environment-friendly supramolecular injection booster and a preparation method thereof. Background technique

[0002] Water injection development is the main production method in oilfields. During the production process, due to factors such as water-sensitive damage, scaling, and solid-phase plugging, the pressure guiding capacity of the formation is weak, and low-permeability oil wells have problems such as high water injection pressure, small water injection volume, and unbalanced injection and production, resulting in The water injection pressure is too high, the water injection volume decreases rapidly, and the production of oil wells decreases rapidly. Therefore, there is an urgent need to develop a method for depressurization and boosting injection.

[0003] Chinese patent document CN201810336318.5, application date 20180416, the patent name is:...

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