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中国石油大学(华东)海洋油气装备与安全技术研究中心
Received:18 July 2025,
Revised:2026-04-20,
Accepted:02 November 2025,
Published:25 October 2026
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张恒,李彦伟,隋乐,等.深水水下井口动态稳定性分析[J].石油机械,2026,54(10):55-62.
Zhang Heng,Li Yanwei,Sui Le,et al.Dynamic stability analysis of deepwater subsea wellhead[J].China Petroleum Machinery,2026,54(10):55-62.
张恒,李彦伟,隋乐,等.深水水下井口动态稳定性分析[J].石油机械,2026,54(10):55-62. DOI: 10.12473/CPM.202507060.
Zhang Heng,Li Yanwei,Sui Le,et al.Dynamic stability analysis of deepwater subsea wellhead[J].China Petroleum Machinery,2026,54(10):55-62. DOI: 10.12473/CPM.202507060.
深水钻井水下井口长期承受海洋环境载荷、平台运动及隔水管振动等复杂动载,其动态稳定性是保障深水钻井安全的关键。现有研究尚未充分考虑水下井口结构参数尤其是井口倾斜对其动态稳定性的影响。为此,建立了考虑井口初始倾斜状态的钻井平台-隔水管-水下井口全耦合动力学模型,系统分析了倾斜角度、出泥高度、导管尺寸等参数对水下井口动态稳定性的影响规律。进一步采用正交试验设计,量化了各参数对水下井口稳定性关键指标的敏感性。研究结果表明:当导管壁厚一定时,增大导管直径可降低水下井口动态响应;当导管直径一定时,增大导管壁厚亦可降低动态响应;水下井口的动态响应随出泥高度的增加而增大,并随井口倾斜角度的增大而增大;固井质量对水下井口动态响应的影响较小;出泥高度是影响水下井口动态稳定性的最显著因素,其次为倾斜角度、导管直径与壁厚,而固井质量影响相对最小。研究揭示了水下井口结构参数对其动态稳定性的作用机制,可为优化井口设计和提升深水钻井安全性提供理论依据。
Deepwater subsea wellheads are subjected to long-term complex dynamic loads, including marine environmental loads, platform motions, and riser vibrations. Their dynamic stability is crucial to ensuring deepwater drilling safety. However, existing research has not adequately addressed the impact of structural parameters,particularly wellhead inclination, on dynamic stability. This study establishes a fully coupled dynamic model of the drilling platform-riser-subsea wellhead system incorporating initial wellhead inclination. The influence of inclination angle, wellhead stick-up height, and conductor dimension on dynamic stability is systematically analyzed. Furthermore, orthogonal experiment is designed to quantify the sensitivity of these parameters to key stability indicators. The results demonstrate that, given the conductor wall thickness, increasing the conductor diameter mitigates the dynamic response of the subsea wellhead, and given the conductor diameter, increasing the conductor wall thickness also reduces the dynamic response. Moreover, the dynamic response of the subsea wellhead enhances with the increasing wellhead stick-up height, and also with the increasing wellhead inclination angle. The cementing quality has less impact on the dynamic response. Clearly, wellhead stick-up height is the most significant factor affecting dynamic stability, followed by inclination angle, conductor diameter, and wall thickness, while cementing quality exhibits the least influence. This research reveals the mechanism by which structural parameters of the subsea wellhead govern its dynamic stability, providing a theoretical basis for optimizing wellhead design and enhancing deepwater drilling safety.
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