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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 order to deal with the long-open hole section into the non-malignant leakage, Zhongyuan Oilfield developed a long section of high-intensity flat push plugging technology. Blocking with Diesel, lime, cement, calcium bentonite, QS-2, DF-1 and asbestos dubbed into the drain before the block is not solidified, not thick, good fluidity; Water, rapid formation of high-strength plug. According to the requirements before construction with a good slurry and replace the drilling fluid drilling tools in the casing. After the closure of the first plugging plugging slurry, and then hit the drilling fluid to replace the push, when the nesting pressure increases that the slurry has entered the temperature layer. According to the design into the leakage layer part of the slurry, immediately stop the pump, open well pressure, construction is over. The field of 5 wells test, have achieved good results.