长井段高强度平推堵漏技术

SQUEEZE TECHNIQUES FOR REMEDY OF LOST CIRCULATIO AT LONG INTERVALS

杨振杰 张献丰 李立龙 张全明

Yang Zhenjie Zhang Xianfeng Li Lilong Zhang Quanming

中原石油勘探局钻井四公司

为对付长裸眼井段有进无出的恶性漏失,中原油田研究出长井段高强度平推堵漏技术。堵浆用狄塞尔、石灰、水泥、钙膨润土、QS-2、DF-1和石棉绒配成,进入漏层前堵装不凝固、不稠化,流动性良好;进入漏层后快速失水,迅速形成高强度堵层。施工前按要求配好堵浆和顶替钻井液,施工时钻具在套管内。关井后先打堵浆,然后再打顶替钻井液平推,当套压上升时说明堵浆已进入温层。按设计挤入漏层部分堵浆后,立即停泵,开井放压,施工结束。经现场5口井试验,均取得了很好的效果。

In the purpose of remedy of severe lost circulation without return at long intervals, squeeze techniques were brought in light for application. The composltion of the squeeze fluid is of diesel oil, lime, cement, calcium clay, QS-2, DF-1, and asbestos fibers. No thickening and setup occur before the entry of the squeeze fluld into formations and they are with very good fluidity. After the fluid is squeezed into formation, they lose their liquid content quickly and setup into a plug with good strength. The squeeze fluid should be prepared in advance. With the drill string in the hole, the fluid should be circulated against the formation with an operation pressure higher than circulation pressure. Practices at 5 wells gave satisfied results.

10.3969/j.issn.1000-7393.1997.01.011