天府气田致密气支撑剂回流防治技术研究及应用

Study on Proppant Reflux Prevention and Control Technology of Tight Gas in Tianfu Gas Field

摘要: 目前，天府气田致密气的主要有效开发形式为加砂体积压裂，但在压后试油和生产阶段存在支撑剂回流现象，高速流体携带碎屑颗粒对阀门、管道等形成严重的冲蚀，造成本体穿孔失效，严重影响生产正常运行。形成一套有效的支撑剂回流防治技术，对于保障天府气田致密气的高效开发和人员设备安全，具有重要意义。研究及生产实际表明，压裂控砂、生产防砂、井口除砂相结合的技术路线是支撑剂回流防治的有效技术，能减少支撑剂回流及砂粒冲蚀对设备的破坏作用，有力夯实了致密气高效平稳运行基础。

Abstract: At present, the main effective development form of tight gasin Tianfu gas field is volumetric frac-turing with sand. However, proppant reflux phenomenon exists in the post-pressure oil testing and production stage, and the debris particles carried by high-speed fluid seriously erodes valves and pipelines, resulting in body perforation failure and seriously affects the normal operation of pro-duction. The formation of an effective proppant reflux control technology is of great significance to ensure the efficient development of tight gas in Tianfu gas field and the safety of personnel and equipment. Research and production practice show that the combination of sand control in fractur-ing, sand control in production and sand removal at wellhead is an effective technology for proppant reflux prevention and control, which can reduce the damage of proppant reflux and sand erosion on equipment, and effectively consolidate the foundation for efficient and stable operation of tight gas.