Zhao Shuo, Fu Meilong, Hou Baofeng, Zhang Junbo, Li Xudong
Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering, Yangtze University, Wuhan, 430100, China.
Sci Rep. 2024 Dec 28;14(1):31334. doi: 10.1038/s41598-024-82809-6.
The application of classic foaming agent faces several issues, including excessive use of defoaming agent, inadequate defoaming, pipeline blockage due to silicone oil precipitation, and high development cost of the foaming agent. To address the aforementioned issues, a novel intelligent foaming agent was created. This resulted in the development of a new intelligent foaming and discharging agent system. The study focused on analyzing key performance indicators of the foaming agent system, including temperature resistance, salt resistance, oil resistance, phase transition temperature point, foaming ability, foam half-life, liquid carrying capacity, and self-defoaming ability. The experimental findings indicate that TS-1 and ESAB exhibit favorable foaming performance and stability under the conditions of 90 °C temperature, 20 × 10 mg/L salinity, and 40% condensate oil content after a 1:1 mixture. Additionally, they are capable of undergoing phase transition within the temperature range of 12 to 15.2 °C. The Waring blender stirring method resulted in the foaming agent solution, which had a concentration of 3 g/L, reaching a volume of 487 mL. The foam's half-life was 20 min, and the liquid carrying rate was 91.7%. After a duration of 20 min, the rate of self-defoaming was 81.6%. The addition of the self-developed synergist facilitated the defoaming process, which was successfully accomplished within a time frame of 10 min. Moreover, the self-defoaming rate achieved a remarkable 100%. The foam drainage agent system may autonomously react to variations in ambient temperature and achieve phase transition behavior through temperature stimulation. This is accomplished by utilizing the natural temperature difference between the bottom hole and the wellhead during foam drainage gas recovery operations. This innovation presents a novel concept for the foam drainage agent used in recovering drainage gas. It simplifies the operation of gas recovery in oil and gas wells, provides solutions for further smartening up oil and gas fields. It holds immense theoretical and practical importance.
经典起泡剂的应用面临着几个问题，包括消泡剂使用过量、消泡不充分、硅油沉淀导致管道堵塞以及起泡剂的开发成本高。为了解决上述问题，研发了一种新型智能起泡剂。这促成了一种新型智能发泡与排液剂系统的开发。该研究着重分析了起泡剂系统的关键性能指标，包括耐温性、耐盐性、耐油性、相变温度点、发泡能力、泡沫半衰期、携液能力和自消泡能力。实验结果表明，TS - 1和ESAB在90℃温度、20×10mg/L盐度和40%凝析油含量条件下按1:1混合后，具有良好的发泡性能和稳定性。此外，它们能够在12至15.2℃的温度范围内发生相变。采用韦林氏搅拌器搅拌法使浓度为3g/L的起泡剂溶液体积达到487mL。泡沫半衰期为20分钟，携液率为91.7%。20分钟后，自消泡率为81.6%。添加自主研发的增效剂促进了消泡过程，在10分钟内成功完成。而且，自消泡率达到了显著的100%。泡沫排液剂系统可自主响应环境温度变化，并通过温度刺激实现相变行为。这是利用泡沫排液采气作业期间井底与井口之间的自然温差来实现的。这一创新为泡沫排液采气所用的排液剂提出了一个新概念。它简化了油气井采气作业，为油气田进一步智能化提供了解决方案。具有巨大的理论和实际意义。
