摘要
Abstract
The HTHP (high temperature and high pressure) areas in the Ying-Qiong Basin, northern South China Sea have immense exploration potential of natural gas resources. However, these areas are geologically characterized by high temperature, high pressure, multiple pressure steps and narrow safety density window, and HTHP well drilling engineering design and operation are faced with huge challenges. Based on over 30 years’ technology research and practical operation of 50 HTHP wells in this sea area, the key drill-ing technologies suitable for HTHP natural gas exploration in South China Sea are developed, and they are multi-mechanism formation overpressure prediction, high-temperature drilling lfuid, pressure stabilization and channeling prevention cementing, safe drilling of narrow pressure window, and HTHP integrated drilling and ROP improvement. By virtue of these technologies, the drilling dififculties of HTHP exploration in South China Sea are solved, and the drilling operation is carried out safely and efifciently. This complete set of proven safe and efifcient drilling technology system and management model for offshore HTHP exploration wells provides the reference for the drilling offshore HTHP wells in petroleum industry.关键词
南海/莺-琼盆地/高温高压/勘探井/钻井技术/展望Key words
South China Sea/Ying-Qiong Basin/high temperature and high pressure/exploration well/drilling technology/pros-pect分类
能源科技
