Nano-foam lifting liquid-draining gas production rod and preparation method and application

Abstract

The invention belongs to the technical field of natural gas well drainage, and discloses a nano-foam lifting liquid-draining gas production rod and a preparation method and application. The nano-foamlifting liquid-draining gas production rod comprises a rod body A and a rod body B. The preparation method comprises the following steps: heating and stirring raw material components of the rod body A, pouring the mixed materials into a cylindrical plastic grinding tool, performing cooling and molding; and heating and stirring raw material components of the rod body B, pouring the mixed materialsinto the cylindrical plastic grinding tool, and performing cooling and forming. The application method comprises the following steps that the rod body A and the rod body B are put into a shaft, a large amount of high-water-content foam is generated through a chemical reaction, and therefore accumulated liquid in the shaft is lifted out of a wellhead, and the purpose of liquid draining and repeatedproduction is achieved. Tests show that the foaming force of the nano-foam lifting liquid-draining gas production rod can reach 245 mL / g to the maximum. By means of the rod, a large number of gas wells which do not have conventional foam drainage conditions, such as wells with serious liquid accumulation, wells which are shut down due to flooding, large-water-volume wells and low-pressure small-production wells, can be recovered, the productivity is maintained, and the final recovery efficiency of the gas wells and the final exploitation benefits of gas fields are improved.

Description

technical field [0001] The invention belongs to the technical field of natural gas well drainage, and in particular relates to a nano-foam lifting liquid drainage gas extraction rod, a preparation method and application thereof. Background technique [0002] In recent years, a large number of low-pressure, low-yield, low-abundance and low-permeability tight gas reservoirs in China have been put into development. After the gas wells in this type of gas reservoir are put into production, the pressure and production decline rapidly. It cannot meet the liquid-carrying requirements in the production process of gas wells, resulting in liquid accumulation at the bottom of some gas wells or in the wellbore, which seriously affects the continuous and stable production of gas wells. Drainage gas recovery has long occupied the main position in the production and operation of this type of gas reservoir. Among the numerous drainage gas recovery technologies, the foam drainage gas recov...

AI Technical Summary

Problems solved by technology

However, at present, more and more gas wells have serious liquid accumulation, and the gas flow velocity is extremely low, and even a large number of gas wells are flooded and shut down, and the gas flow velocity is zero, which cannot meet the conditions of agitation and foaming

This has resulted in low efficiency in the use of existing foam drainage agents, and it is even more difficult to be effective in a large number of wells with severe fluid accumulation, water-flooded shutdown wells, large water volume wells, and low-pressure small-production wells.

The application range of the foam drainage gas recovery process is severely limited, and the economic benefits and application prospects of the process are restricted

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