西南石油大学学报（自然科学版）2025，Vol.47Issue(5)：143-150,8.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
A Research on Internal Pressure Strength Calculation of Shut-in Casing for Overflow in High Pressure Gas Wells
李亚天 1李文哲 1王留洋 2文春宇 1李润泽3
作者信息
- 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
- 折叠
摘要
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.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Key words
casing strength/internal pressure resistance/burst model/yield strength/finite element analysis分类
石油、天然气工程引用本文复制引用
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):143-150,8.
