石油钻采工艺2012，Vol.34Issue(4)：114-118,5.
酸性气田开发中腐蚀对套管强度的影响
Analysis on the influence of corrosion on casing strength in acidic gas field development
车争安 1张智 2陈胜宏 1邵明仁 1贺占国1
作者信息
- 1. 中海油能源发展股份有限公司监督监理技术分公司,天津 300452
- 2. 油藏地质及开发工程国家重点实验室·西南石油大学,四川成都 610500
- 折叠
摘要
Abstract
During the service of casing in acidic gas field, the acidic environment and other corrosion condition can cause casing corrosion. The thinning of casing wall and the appearing corrosion cavity in the internal wall of casing can both reduce the effective strength of casing. Thereby they can affect the collapsing strength and internal pressure strength of casing. It is maily discussed in the paper that the affection on casing strength from stress concentration caused by corrosion cavity. The corrosion cavity of casing is regarded as sphere-like cavity. The mathematical model is established that can calculate the stress concentration factor caused by corrosion cavity, based on the knowledge of plasto-elasticity. The mathematical model is also established, which can calculate the residual intensity of casing after corrosion. The parameters of corrosion cavity affecting the strength of casing are analyzed. It is also analyzed that the relationship between the residual intensity of casing and the depth and diameter of corrosion cavity.关键词
酸性气田/腐蚀孔/套管强度/应力集中Key words
acidic gas field/ corrosion cavity/ casing strength/ stress concentration分类
能源科技引用本文复制引用
车争安,张智,陈胜宏,邵明仁,贺占国..酸性气田开发中腐蚀对套管强度的影响[J].石油钻采工艺,2012,34(4):114-118,5.
