The invention discloses a foaming material for a gas field foam discharging agent, a slow dissolving foam discharging agent, and a preparation method of the slow dissolving foam discharging agent, and belongs to the technical field of the oilfield
chemistry. The foaming material comprises, by weight, 1 part of
Sapindus mukurossi Gaertn extract, 0.03-0.1 parts of
fatty alcohol polyoxyethylene ether AEO18 and 0.01-0.1 parts of
lauric diethanolamide. The foaming material can be obtained by compounding the above three components, can mutually enhance surface active substances in the foaming material, improves the stability and environmental disturbance resistance of foams, improves the biodegradability of a surfactant, and reduces the
toxicity of the foam discharging agent and the
pollution of the foam discharging agent to the environment. PVA and an enteric
acrylic resin are added as dressing materials, so the dissolving rate of the foaming material in water can be effectively controlled, thereby the foam discharging agent obtained by using the
foaming agent is slowly dissolved in water, has a strong
salinity resistance and a strong condensate oil resistance, has a very strong secondary foaming ability, has good compatibility with drugs comprising
methanol, a
corrosion inhibitor, a scale inhibitor and the like, and does not chemically react with gas or liquid components.