Λεπτομέρειες βιβλιογραφικής εγγραφής
| Τίτλος: |
海上气井井内分段悬挂排水采气速度管柱设计及参数优选. |
| Alternate Title: |
Design and parameter optimization of segmented suspension velocity string for drainage and gas production in offshore gas wells. |
| Συγγραφείς: |
李军1 lijun10@cnooc.com.cn, 吴世运2 wushiyun38@163.com, 冯钰润1, 雷越2, 韩滔2, 任京文3 |
| Πηγή: |
Oil Drilling & Production Technology / Shiyou Zuancai Gongyi. May2026, Vol. 48 Issue 3, p353-360. 8p. |
| Θεματικοί όροι: |
*Engineering design, *Process optimization, Offshore gas well drilling, Gas extraction |
| Abstract (English): |
To reduce the risk of liquid loading in a low-productivity offshore gas well in Panyu 30-1 field under restricted production proration, a drainage and gas production scheme using segmented suspended velocity-string in the borehole was proposed considering the constraints of downhole safety valve and platform lifting capacity. A critical liquid-carrying model for directional gas wells was adopted, combining with the original production string structure, downhole safety-valve position, wellhead pressure, water-gas ratio, and platform lifting capacity, the effects of velocity-string setting depth, tubing size, connection mode, flow capacity, erosion risk, and running/pulling loads on scheme applicability were analyzed, and the key process parameters were determined. The calculation results show that the velocity string improves liquid carrying mainly within the covered well section, indicating an obvious intervaldependent effect. The inner diameter of the velocity string is the key factor affecting the critical liquid-carrying flow rate, erosion risk, and flow capacity. As the inner diameter increases, both the critical liquid-carrying flow rate and maximum gas flow capacity increase, whereas the erosion rate ratio decreases. The evaluation results indicate that the velocity string with an outer diameter of 60.325 mm reduces the critical liquid-carrying flow rate to 5.3×104 m³/d, meeting the drainage and gas production requirement of the target well under low production proration. The segmented suspended velocity string can boost the liquid-carrying capacity in key well sections while retaining the main structure of the original production string, providing a reference for drainage and gas production design in similar offshore low-rate gas wells constrained by downhole safety valves, wellbore drift diameter, and platform operation capacity. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
为降低番禺 30-1 某海上低产气井在低配产条件下的井筒积液风险, 提出适应井下安全阀和平台吊装约束的井内分段 悬挂速度管柱排水采气方案。采用定向井临界携液模型, 结合原生产管柱结构, 井下安全阀位置, 井口压力, 水气比及平 台吊装能力, 分析速度管柱下入深度, 管径, 连接方式, 过流能力, 冲蚀风险和起下载荷对方案适用性的影响, 并确定关 键工艺参数。计算结果表明, 速度管柱的携液改善作用具有明显井段范围, 主要作用于其覆盖井段; 速度管柱内径是影响 临界携液流量, 冲蚀风险和过流能力的关键因素, 随着内径增大, 临界携液流量和最大过流气量增加, 冲蚀速率比降低。 评价结果表明, 外径 60.325 mm 速度管柱可使临界携液流量降至 5.3×104 m ³/ d, 满足该井低配产条件下的排水采气需求。井 内分段悬挂速度管柱可在保留原生产管柱主体结构的条件下提高关键井段携液能力, 可为受井下安全阀, 井筒通径和平台 作业能力限制的类似海上低产气井排水采气设计提供参考. [ABSTRACT FROM AUTHOR] |
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