苏里格气田经过20余年的开采,地层压力普遍降低,气井生产能力下降,井筒携液能力逐渐变差,低产气井数量众多且积液现象越来越显著,严重影响气井产能的有效发挥。排水采气技术是目前解决气井积液问题的主体手段,但需依靠气井本身的地层能力,存在一定局限性。为有效排除低产气井井筒积液,恢复正常生产,研究分析了低压气液混输增压技术的原理和特点,优选试验井利用井口橇装式气液混输增压装置进行现场试验,装置无故障运行44 d,累计增产天然气27.6×10⁴ m³,产出投入比超过1.5,效果良好,具有一定经济效益。研究结果表明:低压气液混输增压装置技术工艺可行,装置生产运行稳定,能及时有效地排除井筒积液。研究结果为苏里格气田低产气井排水采气提供了技术支撑,但由于还处于现场试验阶段,仍需进一步加强理论研究与现场论证。

After more than 20 years production of Sulige gas field, formation pressure has generally decreased, gas well productivity has declined, and wellbore fluid-carrying capacity has gradually deteriorated. A large number of low-production gas wells and increasingly obvious liquid accumulation have seriously affected the effective performance of gas wells. Drainage gas production technology is currently the main method to address this issue, but it relies on the formation energy of the gas well itself and has certain limitations. Therefore, in order to effectively remove the wellbore fluid accumulation and resume normal production, this study analyzes the principles and characteristics of low-pressure gas-liquid mixed transportation and boosting technology. A field test was conducted on selected pilot wells using a wellhead skid-mounted gas-liquid mixed transportation and boosting device. The test device has been running for 44 days without failure, a cumulative gas increase of nearly 27.6×10⁴ m³, and an output-to-input ratio of more than 1.5. The test results are positive and demonstrated certain economic benefits. The result of field test indicates that the low-pressure gas-liquid mixed transportation and boosting technology is reliable and technically feasible, with stable device operation capable of timely and effectively removing wellbore liquid accumulation. The research results provide technical support for drainage gas production of low-production wells in the Sulige gas field. However, as the technology is still at the field test stage, further theoretical research and field validation are required.