Abstract: To solve the problems of excessive consumption of foaming agents and defoaming agents, incomplete defoaming, and complex processes in liquid drainage gas production technology, a gas well temperature-responsive self-defoaming intelligent gas drainage foaming agent TS-1 was developed, and its performance was evaluated. The study shows that the foaming agent has good foaming performance and stability at a temperature of 80 ℃ and a salinity of 20×10⁴ mg/L; a 0.2% foaming agent solution can undergo a phase transition by itself around 20 ℃, changing from foamability to defoamability, with a foam volume reaching 420 mL and a foam half-life reaching 13 minutes; formation sand has little effect on the foaming ability of the foaming agent solution, with a liquid-carrying rate of 84.8%. After 20 minutes, the self-defoaming rate reached 84.3%; after adding the synergistic agent ESAB, the self-defoaming rate approached 100%, and the self-defoaming ability was enhanced; at the wellhead position and in surface pipelines, the self-defoaming intelligent foaming agent for gas wells can rapidly self-defoam under the influence of ambient temperature, avoiding the step of adding defoaming agents, simplifying the operation process, and effectively improving the efficiency of foam drainage operations. After the successful application of the self-defoaming intelligent foaming agent, the average daily gas production increase was 4 000 m³, and the average daily liquid discharge increase was 2.8 m³, showing significant gas increase and liquid discharge effects. This achievement provides a new technical approach for gas well liquid drainage gas production and has important field application value.

Key words: gas drainage foaming agent, temperature-sensitive, liquid drainage gas production, self-defoaming, gas well