深水气田井口抬升影响因素分析及应对措施

Analysis of Influencing Factors and Countermeasures of Wellhead Uplift in Deep Water Gas Field

苗建 覃华育 代俊 姜学道 时俊

MIAO Jian QIN Huayu DAI Jun JIANG Xuedao SHI Jun

中海石油（中国）有限公司深圳分公司，广东深圳　518054

Shenzhen Branch of CNOOC (China) Limited, Shenzhen Guangdong, 518054, China

随着某深水气田的开发，各口生产气井井口都出现了不同程度的抬升现象，井控风险较大，破坏了气井井筒完整性，影响气井正常生产寿命，严重时还可能会造成生产管线断裂，直接影响气田安全生产。因此，通过对气井井口抬升影响因素进行分析，建立气井井口装置抬升的多管柱耦合系统井口抬升计算模型，对井口抬升高度进行计算，并与现场实测值进行对比分析。结果表明未固井段管柱温度变化是引起采油树抬升的主要原因，并给出了针对性的应对措施及建议，为改善或解决气田井口抬升问题提供了借鉴。

With the development of a deep-water gas field, the wellhead of each production gas well has different degrees of uplift. The risk of well control is large, which destroys the integrity of the gas well wellbore and affects the normal production life of the gas well. In severe cases, the production pipeline may be broken, which directly affects the safe production of the gas field. Therefore, through the analysis of the influencing factors of gas well wellhead uplift, the wellhead uplift calculation model of multi-column coupling system of gas well wellhead device uplift is established, and the wellhead uplift height is calculated and compared with the field measured value. The results show that the temperature change of the string in the uncemented section is the main reason for the uplift of the Christmas tree, and the corresponding countermeasures and suggestions are given, which provides a reference for improving or solving the problem of wellhead uplift in gas fields.

https://doi.org/10.3969/j.issn.1008-2336.2023.02.094