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酸化解卡方法解除伊朗TBK-8井卡钻事故
引用本文:刘德胜,胡欣峰,王文勇,李亚强,石璟玲. 酸化解卡方法解除伊朗TBK-8井卡钻事故[J]. 钻井液与完井液, 2006, 23(6): 77-78
作者姓名:刘德胜  胡欣峰  王文勇  李亚强  石璟玲
作者单位:1. 中油长城钻井有限责任公司,北京
2. 新疆石油管理局,新疆克拉玛依
摘    要:伊朗19 2项目TBK-8井在二开空气钻进过程中,由于水层和强水敏性页岩地层在同一井段相遇,使页岩钻屑在雾化环境下粘结成团,无法带出,瞬间沉积在钻头上,形成一个环状堆积。当试图通过活动解卡时,堆积物越挤越死,形成一个圆柱,卡死钻具。现场先后采用了浸泡柴油和解卡剂的解卡措施,都没有取得效果。当发现卡钻位置在灰岩地层时,仅注入15%的盐酸5.5m3,就顺利解卡。因此,对于粘附卡钻以外的卡钻事故,当卡钻位置在碳酸盐岩井段,且酸液能注到卡点以下时,可采用酸化方法解卡。

关 键 词:卡钻  解卡  酸化  解卡剂  伊朗TBK-8井
文章编号:1001-5620(2006)06-0077-02
修稿时间:2006-03-28

Acidification backing off technology in Iron TBK-8 well
LIU De-sheng,HU Xin-feng,WANG Wen-yong,LI Ya-qiang,SHI Jing-ling. Acidification backing off technology in Iron TBK-8 well[J]. Drilling Fluid & Completion Fluid, 2006, 23(6): 77-78
Authors:LIU De-sheng  HU Xin-feng  WANG Wen-yong  LI Ya-qiang  SHI Jing-ling
Abstract:Air drilling was employed in the second section of the Iron TBK-8 well. The shale cuttings were agglomerating in atomized environment and deposited on the bit instantly forming a annular accumulation as a result of pay zone and strong water sensitive shale coexisting. The conglomerates had a compacting trend and formed a cylinder leading to freeze in the drilling tool when trying to back off by the drilling tool movement. Soak diesel and releasing stuck agents were employed in site but no any effect. Hydrochloric acid with the concentration of 15% was employed and back off operation achieved success in limestone formation. Acidizing backing off is available except for sticking in carbonate formation if acidizing fluid can be below the free point.
Keywords:stuck  back off  acidification  releasing stuck agent  Iran TBK-8 well
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