石油钻采工艺2025，Vol.47Issue(4)：472-480,9.DOI:10.13639/j.odpt.202504001
氮气泡沫解除气井软堵塞技术及应用
Nitrogen foam technology for removing soft plugging in gas wells and its application
张斌 1李滨阳 1郝晓蕾 1荀小全2
作者信息
- 1. 胜利油田康贝石油工程装备有限公司,山东 东营 257000
- 2. 中国石化华北油气分公司勘探开发研究院,河南 郑州 450006
- 折叠
摘要
Abstract
In the middle and later stages of gas well production,"soft plugging"issue that commonly occurs in the production string has become a key challenge restricting productivity.This kind of plugging is mainly formed by the deposition of a mixture of condensate oil,oil sludge sand,and residual foaming agents under low flow rate conditions.To address this problem,the concept of"soft plugging"is proposed,and its formation mechanism is revealed.And then,the main dynamic production behavior and hazards after plugging are identified,providing an important basis for recognizing such gas wells.Based on the low density and high sand-carrying capacity of nitrogen foam fluid,a"foam density-flow rate"cooperative control model is established.By optimizing the flushing parameters,a balance is achieved between the sand-carrying efficiency of nitrogen foam and reservoir protection.Field tests in 8 wells(6 shale gas wells and 2 tight sandstone gas wells)demonstrates a 100%success rate in removing plugging,the gas production of single well is increased by 3.3 times,and the validity exceeds 90 days.Research indicates that nitrogen foam flushing technology can provide an economical and efficient solution for the stable production of gas wells in the middle and later stages,with significant potential for broad application.关键词
天然气井/软堵塞/氮气泡沫冲洗/解堵机理/泡沫密度-排量协同控制Key words
natural gas well/soft plugging/nitrogen foam flushing/plugging removal mechanism/coordinated control of foam density and flow rate分类
能源科技引用本文复制引用
张斌,李滨阳,郝晓蕾,荀小全..氮气泡沫解除气井软堵塞技术及应用[J].石油钻采工艺,2025,47(4):472-480,9.
