Gas-Induced Dynamic Characteristics of Tubing Strings in Ultra-Deep Wells： a Case Study of an Ultra-Deep Well in the Shunbei No. 4 Belt

Zhu Xiaohua; Zeng Li; Li Dongmei; Li Lintao

doi:10.12473/CPM.202505044

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Gas-Induced Dynamic Characteristics of Tubing Strings in Ultra-Deep Wells： a Case Study of an Ultra-Deep Well in the Shunbei No. 4 Belt

OIL AND GAS FIELD DEVELOPMENT ENGINEERING | 更新时间：2026-10-15

- Gas-Induced Dynamic Characteristics of Tubing Strings in Ultra-Deep Wells： a Case Study of an Ultra-Deep Well in the Shunbei No. 4 Belt
- China Petroleum Machinery Vol. 54, Issue 9, Pages: 83-92(2026)
- 作者机构：
  
  1.西南石油大学机电工程学院
  2.中国石油化工股份有限公司西北油田分公司
- 作者简介：
- 基金信息：
- DOI：10.12473/CPM.202505044
  CLC： TE931
- Received：15 May 2025，
  
  Revised：2026-03-24，
  
  Accepted：04 July 2025，
  
  Published：25 September 2026
- 稿件说明：
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祝效华，曾理，李冬梅，等.超深井气致管柱动力学特性研究［J］.石油机械，2026，54（9）：83-92.

Zhu Xiaohua，Zeng Li，Li Dongmei，et al.Gas-Induced dynamic characteristics of tubing strings in ultra-deep wells： a case study of an ultra-deep well in the Shunbei No. 4 Belt［J］.China Petroleum Machinery，2026，54（9）：83-92.
祝效华，曾理，李冬梅，等.超深井气致管柱动力学特性研究［J］.石油机械，2026，54（9）：83-92. DOI： 10.12473/CPM.202505044.

Zhu Xiaohua，Zeng Li，Li Dongmei，et al.Gas-Induced dynamic characteristics of tubing strings in ultra-deep wells： a case study of an ultra-deep well in the Shunbei No. 4 Belt［J］.China Petroleum Machinery，2026，54（9）：83-92. DOI： 10.12473/CPM.202505044.

摘要

顺北4号带凝析气藏属于一超、四高气藏，极端恶劣的管柱服役环境已导致多口井发生管柱断脱事故。为了从生产管柱变形量、应力阐释方面提出优化管柱组合，针对顺北4号带某失效井，基于混合有限元-计算流体力学数值方法，用RNG

-ε 湍流模型模拟高压气体流动，考虑高压气体与采气管柱之间的流固耦合，建立了全井气致管柱振动响应模型，使用交错积分耦合法实现模型求解。研究结果表明：导致S1井第5根油管横向破裂的原因是第5根油管刚好处于脱离井口约束保护的临界位置，同时在交变应力作用下δ

段管柱产生剧烈的横向变形；导致第236根油管断裂的原因是几何突变引起的应力集中及纵向弹跳；使用提出的优化管柱组合后，小幅增加了成本，但横向、纵向变形量大幅降低，同时因壁厚突变造成的应力集中现象得到了有效控制。研究方法可用于计算不同产量和不同油管组合中的管柱动态行为，对管柱安全预警和管柱设计优化具有重要意义。

Abstract

The condensate gas reservoir in the Shunbei No. 4 belt is an ultra-deep accumulation with high temperature， high pressure， high corrosive fluids， and high productivity. The extremely harsh service environment has caused string breakage and falling in several wells. It is necessary to optimize string configuration by interpreting the deformation and stress of the production string. Taking an incident well S1 in the Shunbei No. 4 belt as an

example， the RNG

turbulence model was used to investigate the high-pressure gas flow， with the support a hybrid finite element-computational fluid dynamics （FE-CFD） numerical simulation method. Considering the fluid-solid interaction （FSI） between the high-pressure gas and the production string， a full-well gas-induced tubing string vibration response model was established and solved using the staggered integral coupling method. The results show that the transverse rupture of the 5th tubing in Well S1 occurred because it was just located at the critical position beyond the constraint protection of the wellhead， while the

section of the tubing string underwent severe transverse deformation under alternating stress. Moreover， the breakage of the 236th tubing was caused by the combined effect of stress concentration induced by geometric changes and longitudinal bouncing. When the optimized string configuration was used， the cost increased slightly， but the transverse and longitudinal deformations were mitigated greatly. Furthermore， stress concentration induced by sudden change in wall thickness was effectively controlled. The proposed method can be used to calculate the dynamic behaviors of strings under different production rates and tubing configurations. The study provides certain reference for string safety warning and design optimization.

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