Volume 32 Issue 2
Mar.  2015
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2015  >  32(2): 58-60
CHEN Fuquan, XIA Ronghui, NIE Qiangyong, HE Tao, ZENG Jian. Application of Special Plugging and Collapse Prevention Technology in Tazhong Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 58-60. doi: 10.3969/j.issn.1001-5620.2015.02.015
Citation: CHEN Fuquan, XIA Ronghui, NIE Qiangyong, HE Tao, ZENG Jian. Application of Special Plugging and Collapse Prevention Technology in Tazhong Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 58-60. doi: 10.3969/j.issn.1001-5620.2015.02.015
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Application of Special Plugging and Collapse Prevention Technology in Tazhong Oilfield

doi: 10.3969/j.issn.1001-5620.2015.02.015

  • Room 502, No. 5 Dong, No. 5 Qu, Tazhi Xiaoqu, Korla, Xinjiang, China

  • Received Date: 2014-12-23
  • Publish Date: 2015-03-31
    Abstract
  • The Cretaceous, Triassic, Permian and Carboniferous systems are thick hard and brittle shales full of fractures in Tazhong area. Bore hole cave-in and collapse were frequently encountered in these formations during drilling. In drilling the Well Zhonggu431-H4, a special plugging and collapse prevention technology had to be used to avoid down hole troubles. Several special plugging agents with "synergistic effect", and a special plugging technology were adopted seal the borehole wall, preventing it against erosion and water penetration. No downhole problems were encountered after 55.3 days of exposure of borehole wall to drilling fluid, 5 times of whole tripping and 3 times short tripping. The special plugging and collapse prevention technology successfully solved the downhole problems caused by the characteristics of formation penetrated, effectively reduced drilling cost and NPT.

     

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