莺歌海盆地超高温高压探井作业模式探索

Operation Mode Study of Ultra-High Temperature and Ultra-High Pressure Exploration Wells in Yinggehai Basin

南海莺歌海盆地超高温高压探井压力窗口极窄,作业风险高,易出现井漏、溢流、井涌、卡钻等问题。在盆地B区,勘探三号半潜式钻井平台自2017年以来先后成功实施了9口超高温高压井。介绍了他们由高温高压井向超高温高压井跨越之后,探索形成的适用于超高温高压井目的层段的技术与作业模式,对海上超高温高压井作业具有一定的借鉴意义。

The ultra-high temperature and ultra-high pressure exploration wells in Yinggehai Basin,South China Sea,have the characteristics of narrow pressure window,high operation risk,frequent well leakage,overflow,kick,drilling pipe sticking and so on.In Block B of the basin,the semi-submersible drilling platform KT3 has successfully implemented in 9 ultra-high temperature and high-pressure wells since 2017.After crossing from high temperature and high pressure well to ultra-high temperature and ultra-high pressure well,the technology and operation mode applicable to the target interval of ultra-high temperature and ultra-high pressure wells in the area has formed,which have certain reference significance for similar offshore operation.