摘要
为了解决大牛地气田预制管柱完井水平井排液困难的问题,开展了速度管柱排水理论研究与现场试验,形成了选井原则、管材优选、参数设计以及生产流程等成熟的做法,确保规模化应用。2013-2015年,大牛地气田共开展速度管柱作业151井次,作业成功率98%以上。下入速度管柱后,气井重建油套连通系统,复合排采得以开展,气井平均生产时率由86.1%提高到96.8%,平均水气比由1.73 m^3/104m^3上升至1.93 m^3/104m^3,排水效果得到明显改善。现场应用结果表明,速度管柱可有效降低气井临界携液流量,提高气井自喷能力,且该工艺不需压井作业,具有施工周期短、不污染产层的特点。
In Daniudi gasfield, there are some problems on drainage gas recovery by pre-prepared string. So, we carried out the theoretical study and experiments on velocity-string drainage. And some mature experiences formed, including well selection principles, tubing optimization, parameter design, and industrial drainage process. From 2013 to 2015, there were totally 151 wells implemented velocity-string drainage gas recovery and their success ratio touched more than 98 %. After running velocity string to gas wells, a new connection mode between casing and tubing was rebuilt to fulfill a compound drainage and recovery. In result, the average production efficiency increased from 86.1 % to 96.8 %, and the average water-gas ratio rose to 1.93 m^3/104m^3 from 1.73 m^3/104m^3, achieving an obvious drainage effect. The field application also shows that this velocity-string drainage may not only decrease the critical liquid-carrying flow rate but also enhance the flowing capacity. In addition, it is featured by no killing operation, short period of drainage operation, and no-pollution payzone.
出处
《天然气技术与经济》
2017年第4期18-20,共3页
Natural Gas Technology and Economy
基金
国家科技重大专项"致密低渗气藏采气集输工艺技术"(2016ZX05048-002-006)
关键词
大牛地气田
水平井
速度管柱
排水采气
Daniudi gasfield
horizontal well
velocity string
drainage gas recovery
