高压气井溢流关井套管抗内压强度计算研究

doi:10.11885/j.issn.1674-5086.2023.02.01.03

西南石油大学学报(自然科学版) ›› 2025, Vol. 47 ›› Issue (5): 143-150.DOI: 10.11885/j.issn.1674-5086.2023.02.01.03

高压气井溢流关井套管抗内压强度计算研究

李亚天¹, 李文哲¹, 王留洋², 文春宇¹, 李润泽³

1. 中国石油西南油气田公司, 四川成都 610017;
2. 中国石油川庆钻探工程有限公司, 四川成都 610000;
3. 油气藏地质及开发工程全国重点实验室·西南石油大学, 四川成都 610500

收稿日期:2023-02-01 发布日期:2025-11-04
通讯作者: 李亚天，E-mail:lytian2020@petrochina.com.cn
作者简介:彭星煜，1982年生，男，汉族，四川成都人，副教授，博士，主要从事油气集输系统节能降耗、油气流动安全保障技术与完整性管理方面的研究。E-mail:pengxy1949@163.com
廖一鸿，2000年生，女，汉族，四川德阳人，硕士研究生，主要从事油气管道腐蚀方面的研究。E-mail:1274260542@qq.com
徐一彬，1997年生，女，汉族，山西忻州人，硕士，主要从事油气田开发方面的研究。E-mail:xyb11_cq@petrochina.com.cn
龚建华，1974年生，男，汉族，四川成都人，主要从事油气田安全开发方面的研究。E-mail:8257758@qq.com
申俊，1970年生，男，汉族，四川成都人，主要从事油气田安全环保与技术监督方面的研究。E-mail:shen_j@petrochina.com.cn

A Research on Internal Pressure Strength Calculation of Shut-in Casing for Overflow in High Pressure Gas Wells

LI Yatian¹, LI Wenzhe¹, WANG Liuyang², WEN Chunyu¹, LI Runze³

1. Southwest Oil and Gas Field Company, PetroChina, Chengdu, Sichuan 610017, China;
2. Chuanqing Drilling Engineering Co. Ltd., PetroChina, Chengdu, Sichuan 610000, China;
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China

Received:2023-02-01 Published:2025-11-04

摘要/Abstract

摘要： 高压天然气井发生溢流关井时，井筒内压力急剧变化导致套管应力分布失衡，显著降低其抗内压强度并增加失效风险。针对现有方法计算关井套管抗内压强度的精度不足问题，提出一种两端开口的套管韧性爆裂模型，计算了BG110SS钢级、规格为244.5 mm×13.8 mm套管的抗内压强度。同时，采用三维软件建立了包含水泥环约束的套管水泥环系统有限元模型，模拟分析套管在关井内压载荷下的力学响应。通过将有限元模拟结果与韧性爆裂模型计算结果进行对比，表明该韧性爆裂模型具有较高的计算精度，能更真实地反映套管的抗内压强度，为高压气井溢流关井工况下套管抗内压强度的科学取值提供了新的参考依据。

关键词: 套管强度, 抗内压强度, 爆裂模型, 屈服强度, 有限元分析

Abstract: During overflow shutdown in high-pressure gas wells, the rapid pressure changes within the wellbore cause an imbalance in casing stress distribution, significantly reducing its internal pressure resistance and increasing the risk of failure. To address the insufficient accuracy of existing methods in calculating the internal pressure resistance of shut-in casings, this paper proposes a toughness burst model for open-ended casings. The model was used to calculate the internal pressure resistance of a BG110SS grade casing with dimensions of 244.5 mm×13.8 mm. Concurrently, a finite element model of a casing-cement ring system incorporating cement ring constraints was established using 3D software to simulate the mechanical response of the casing under shut-in internal pressure loads. Comparison between the finite element simulation results and the calculations from the toughness burst model demonstrates that the proposed model achieves high computational accuracy and more realistically reflects the casing's internal pressure resistance. This provides a new scientific reference basis for determining the internal pressure resistance of casings under overflow shutdown conditions in high-pressure gas wells.

Key words: casing strength, internal pressure resistance, burst model, yield strength, finite element analysis

中图分类号:

TE121

李亚天, 李文哲, 王留洋, 文春宇, 李润泽. 高压气井溢流关井套管抗内压强度计算研究[J]. 西南石油大学学报(自然科学版), 2025, 47(5): 143-150.

LI Yatian, LI Wenzhe, WANG Liuyang, WEN Chunyu, LI Runze. A Research on Internal Pressure Strength Calculation of Shut-in Casing for Overflow in High Pressure Gas Wells[J]. Journal of Southwest Petroleum University(Science & Technology Edition), 2025, 47(5): 143-150.

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高压气井溢流关井套管抗内压强度计算研究

A Research on Internal Pressure Strength Calculation of Shut-in Casing for Overflow in High Pressure Gas Wells

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