地层呼吸效应的识别及对固井质量的影响
Identification of Formation Breathing Effect and Its Impact on Cementing Quality
罗文 1杨元超1
作者信息
- 1. 中海油能源发展股份有限公司工程技术分公司 天津 300452
- 折叠
摘要
地层呼吸效应给钻井井控安全及井下作业安全带来了巨大挑战.分析造成此现象的原因为沉积环境不同,导致地层空隙小于正常深度地层空隙压力,则地层空隙压力与地层破裂压力差值小于正常值,在作业过程中钻井液比重窗口窄.通过介绍呼吸效应如何判别,呼吸效应对井控安全以及后期固井过程中存在的不利影响,提出应对呼吸效应的技术措施,进而提高固井封固质量.
Abstract
The formation breathing effect poses significant challenges to the safety of drilling well control and downhole operations.The analysis shows that the reason for this phenomenon is due to different sedimentary environments,resulting in formation voids being smaller than the normal depth of formation void pressure.Therefore,the difference between formation void pressure and formation fracture pressure is smaller than the normal value,and the drilling fluid density window is narrow during the operation.By introducing how to distinguish respiratory effects,the adverse effects of respiratory effects on well control safety and the subsequent cementing process,technical measures to address respiratory effects are proposed to improve the quality of cementing and sealing.
关键词
沉积环境/呼吸效应/井控/固井质量Key words
Sedimentary environment/Respiratory effect/Well control/Cementing quality引用本文复制引用
出版年
2024
NETL
NSTL
万方数据