土耳其天然碱矿水平对接井井下事故预防与处理

Prevention and treatment of downhole incidents in drilling horizontal intersected well sets at trona mines in Turkey

土耳其卡赞和贝帕扎里天然碱矿定向水平对接井项目,是目前为止世界上规模最大的水平对接井项目,钻井工作量大和技术要求高是该项目的2个主要特点。本文将钻井施工中经常发生的卡钻、井漏、钻具脱落等井下事故及复杂情况进行梳理归纳,结合实际案例对事故原因进行剖析,对比不同处理方法所取得的不同效果,最后提出一些安全有效的事故预防和处理措施。为类似钻井工程预防井下事故及处理措施提供一些借鉴。

The horizontal intersected well set project at Kazan Trona Mine and Beypazari Trona Mine in Turkey boasts of the largest scale in the world by far,with large amount of drilling work and huge technical difficulty.This paper summarizes the common downhole drilling incidents and complex situations that frequently occurred during drilling,such as sticking,drilling fluid loss,and breaking off drilling tools,analyzes the cause of the incidents in combination with the actual cases,compares the different results achieved by different treatment methods,and finally proposes some safe and effective measures for incident prevention and treatment.The experience accumulated on the project could be used as a reference in similar drilling projects for prevention and treatment of downhole drilling incidents.