Self-gas-production solid-foam liquor drainage ball of watered gas well

Abstract

The invention relates to a self-gas-production solid-foam liquor drainage ball of a watered gas well, which is applied to the technical field of the foam drainage gas-production technique. The liquor drainage ball mainly consists of a ball A and a ball B and is characterized in that the ball A contains the components by the weight ratio: 100-150 parts of sodium nitrite and 10-30 parts of foaming agent; and the ball B contains the components by the weight ratio: 100-120 parts of ammonium chloride, 5-10 parts of foam stabilizer, 25-40 parts of catalyst and 5-10 parts of ethylene diamine tetraacetic acid (EDTA). The liquor drainage ball has the effects that the foaming capacity is very good, and the liquor in the gas well can produce the over ten times of foam after the liquor drainage ball is put into the well; in addition, the foam is steady, the half-life period is long, and the liquor carrying capacity is very good. Both the ball A and the ball B are non-toxic, and the inertia and non-toxic gas can be produced after reaction. Moreover, the special high-pressure injection equipment is not needed in the process of the oil field operation, therefore, the technique is simple, and theoperation is convenient.

Description

technical field

[0001] The invention relates to the technical field of oil and gas field development, in particular to a foam drainage gas recovery technology, in particular to a foam drainage reagent processed into a solid spherical shape and capable of self-gasification. Background technique

[0002] At present, foam drainage gas recovery is a commonly used gas recovery method in oilfields. This method is to lift the water in oil and gas wells that are flooded during the gas recovery process of old wells and make gas recovery impossible to the surface through foaming. , and a method of causing water to drain from the well. Most oil and gas field drainage is carried out by foam drainage, and now surfactants are used as foaming agents for drainage, mainly by adding foaming surfactants, such as alkyl (olefin, benzene) sulfonic acid Salts, alkyl (olefin, benzene) sulfates, etc., alkyl phosphates, etc., polyoxyethylene alkylphenol ethers, etc., and synthetic polymers such as p...