天然气与石油2023，Vol.41Issue(6)：98-109,12.DOI:10.3969/j.issn.1006-5539.2023.06.014
低渗气藏气井堵塞停产分析及解堵技术应用
Causes of gas well plugging and application of plugging removal technology in low permeability gas reservoir:A case study of the Changqing gas field in Ordos Basin
摘要
Abstract
The Changing gas field,a typical low-permeability lithological gas reservoir,is characterized by strong heterogeneity and poor physical properties.As the development of the gas field has entered its middle and late stages,the gas wells have been witnessing decreased production or even shutdown due to plugging in the wellbore and reservoir.In response to this issue,extensive research on the mechanisms and causes of the plugging was undertaken,leading to the identification of three types of gas well plugging:corrosion and scaling,sand production,and water lock damage.Consequently,key technical countermeasures were devised,including in-wellbore chemical descaling and coiled tubing sand flushing,deep acidizing,and water lock release in the near-well reservoir.These measures have been applied on a field scale,with 752 revitalized gas wells from 2018 to 2022 resulting in an average annual increase of more than 1.4 million m3 and a total annual increase of over 1 billion m3,effectively tackling the issue of decreased production or shutdown caused by plugging.The output-to-input ratio exceeds 6.0.This offers effective technical support and assurance for the improvement of the plugging removal technology system in the Changqing gas field and the plugging removal and resumption of production in other similar gas reservoirs.关键词
低渗透气藏/气井堵塞/停产原因/解堵技术/应用研究Key words
Low permeability gas reservoir/Gas well plugging/Causes of shutdown/Plugging removal technology/Field application引用本文复制引用
张鹏,杨巧云,苏建辉..低渗气藏气井堵塞停产分析及解堵技术应用[J].天然气与石油,2023,41(6):98-109,12.基金项目
中国石油天然气股份有限公司科学研究与技术开发项目"致密气开发效果评价与开发对策研究"(2021DJ2106) （2021DJ2106）
