摘要
户部寨气田目前已处于开发后期,多数气井射孔段存在砂埋问题,制约了气井产能的发挥,加剧了气田稳产难度。由于砂埋时间久、砂埋井段长,井筒内砂粒板结、压实程度高,常规砂面处理工艺难以获得理想效果。针对这一问题,通过开展专项技术调研并借鉴国内其他气田成功经验,优选氮气泡沫冲砂技术作为本次砂面处理试验手段。为了克服普通油管冲砂作业时井口自封易失效的缺陷,提出了不压井的作业方式,同时设计了"刮刀钻头+螺杆钻具+油管"的冲砂管柱组合。部1-X井现场应用结果表明:采用不压井作业方式和组合式冲砂管柱的措施效果较常规水力冲砂显著提升,相同冲砂进尺条件下施工时间缩短近37%。
Along with the development of Hubuzhai gasfield enters a later stage, and the problems of sand burial appear in most gas wells, which may lead to productivity decline and further influ-ence a stable production. Many common-used sand-surface treatment technologies are unavailable to a good effect due to long sandburied time, long length of sand-buried interval, impervious sand particle, and high compaction. So, an investigation was carried out on the basis of some successful experience from other foreign gasfields, a technology of nitrogen foam sand washing was optimized and used to be a tool for sand-surface treatment, and a method of snubbing process was presented to overcome defects in easy failure in wellhead BOP during a coiled-tubing sand washing. Meanwhile,an assembly of sand-washing rod string including drag bit, screw drill, and coiled tube was designed. Moreover, their application to Bu 1-X well shows that, due to operation time shorting about 37 %under the same sand- washing footage, both the snubbing process and the assembly of sand-washing are better than conventional hydraulic sand washing.
出处
《天然气技术与经济》
2017年第1期27-29,共3页
Natural Gas Technology and Economy
关键词
户部寨气田
砂面处理
不压井
螺杆钻具
气井维护
Hubuzhai gasfield
sand-surface treatment
snubbing process
screw drill
well maintenance
