罗家16井井喷失控解读——过平衡钻井中的井控问题

ANALYSIS OF BLOWOUT OUT OF CONTROL IN WELL LOUJIA16

由于井内平衡、过平衡条件可以演变成欠平衡引发井口溢流和诱发井喷,因此,钻井全过程中连续观察出口管流态和定时观察循环罐液面,起下钻中连续观察出口管,记录、核准应灌钻井液量仍然是发现溢流的最为有效的办法。有条件时,通过人工和仪表测量记录同时进行。特别是起钻灌浆的记录报表格式必须反映液面的动态变化,包含预测灌入量、实际灌入量、误差等内容,同时规定要求强制灌满见返的间隔时间。结合重庆“12.23”罗家16井井喷失控重大事故,收集整理了事故发生之后所能找到的有关的资料和数据进行分析推算,对该井在某些特定地质条件和井身状况下发生井喷的原因进行分析讨论。

Borehole balance and overbalance condition can become underbalanced, thus result in overflow and blowout. During drilling, continuously observing discharge pipe flow regime and time observing fluid level of circulation tank are the most effective method of discovery overflow. Based on blowout out of control accident of Well Loujia 16, the paper analyzed related information and data collected, and discussed the reasons of blowout out of control.