南海海域窄压力窗口精细化施工实践

A refined construction practice with narrow pressure window drilling in the south china sea

窄窗口钻井是深水钻井的重要特点,严重制约着深水勘探开发的脚步。南海西部为中国海洋深水钻井的主战场,由于其特殊的地质条件及作业井难度,窄压力窗口已上升为本区块深水钻井的主要瓶颈之一。文章从窄窗口地层特点出发,系统分析总结国内外解决窄压力窗口钻井的技术措施,针对南海琼东南盆地地层的特殊性,结合多口自营深水井作业实践经验,总结出一套贯穿整个钻井工程的窄压力窗口精细化施工理论,同时给出现场作业井的实际案例,为深水窄压力窗口钻井提供参考依据及技术借鉴。

Narrow window drilling is a crucial characteristic of deepwater drilling,significantly restricting the progress of deepwater exploration and development.The western part of the South China Sea serves as the main battlefield for offshore deepwater drilling in China.Due to its unique geological conditions and operational challenges,narrow pressure windows have become one of the primary bottlenecks in deepwater drilling in this region.This paper systematically analyzes and summarizes the technical measures adopted worldwide to address narrow pressure window drilling,taking into account the specific characteristics of the strata in the Qiongdongnan Basin in the South China Sea.Combining practical experience from multiple self-operated deepwater wells,a set of refined construction theories for narrow pressure window drilling throughout the entire drilling process is developed.Real-life examples from field operations are also provided to serve as a reference and technical benchmark for deepwater narrow pressure window drilling.