Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2026, Vol. 48 ›› Issue (4): 168-180.DOI: 10.11885/j.issn.1674-5086.2026.03.12.03

• A Special Issue on Construction Technologies of Depleted Oil Reservoir Underground Gas Storages • Previous Articles     Next Articles

Vibration Failure Analysis for Injection-production Strings in Deep Directional Gas Storage Wells

WANG Fang, WANG Jinzhong, XU Jingjing, ZHANG Fenggang, MA Yan   

  1. PetroChina Jidong Oilfield Company, Tangshan, Hebei 063004, China
  • Received:2026-03-12 Online:2026-07-17 Published:2026-07-17
  • About author:王芳,1984年生,女,汉族,河北保定人,工程师,主要从事油藏型储气库注采工艺研究、科研方案及设计等工作。E-mail:jdzc_wangfang@petrochina.com.cn
    王金忠,1982年生,男,汉族,山东沂南人,高级工程师,硕士,主要从事油藏型储气库钻采工程,科研方案及设计等工作。E-mail:jdzc_wangjzh@petrochina.com.cn
    许晶晶,1979年生,女,汉族,河南沁阳人,高级工程师,主要从事油藏型储气库注采工艺研究、方案设计等工作。E-mail:xjj88@petrochina.com.cn
    张锋刚,1983年生,男,汉族,陕西渭南人,高级工程师,主要从事油藏型储气库采油气工程技术研究与应用管理等工作。E-mail:zhangfenggang@petrochina.com.cn
    马艳,1982年生,女,汉族,山东平邑人,工程师,主要从事油藏型储气库储层保护、工程设计方面的工作。E-mail:mayan188@petrochina.com.cn

Abstract: Aiming at the problems of vibration instability and strength failure easily occurring in the injection-production string of deep directional wells in hydrocarbon reservoir gas storage under alternating temperature-pressure loads and high-rate injection-production conditions, this paper takes the deep directional wells in Jidong N Gas Storage as the research object, establishes a fluid-structure coupling finite element model, analyzes the vibration response law of the string and the influences of gas injection rate, well depth and string outer diameter on its stress and deformation, identifies the sensitive factors of vibration failure and puts forward safety control strategies. The results show that the vibration of the injection-production string is divided into two stages: unsteady fluctuation (0~6 s) and steady oscillation (7~15 s). The water hammer effect at the initial stage of well opening leads to a sharp rise in stress, with the maximum Mises stress reaching 886.45 MPa, posing a risk of buckling failure. The stress amplitude at the wellhead is the largest, the transverse vibration in the middle of the well is the most significant, and the transverse vibration is much stronger than the longitudinal vibration. The increase of gas injection rate significantly raises the stress level of the string. For the string with an outer diameter of 101.6 mm, the stress exceeds the yield strength at the initial stage of vibration when the gas injection rate reaches 83×104 m3/d. Increasing the outer diameter of the string will raise the initial stress fluctuation amplitude, but can inhibit the increase of transverse vibration. Based on the coupling relationship between “gas injection rate and pipe diameter”, a safety control strategy is proposed to optimize the injection-production gas rate and focus on monitoring the stress mutation at the initial stage of gas injection and the vibration amplitude in the middle of the well. The research results can provide technical support for the safe operation of injection-production strings in deep directional wells of gas storage.

Key words: underground gas storage, injection-production string, string vibration, tubing string failure, safety control

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