Volume 33 Issue 4
Jul.  2016
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ZHUANG Jianshan, SONG Yuanhong, GAO Fei, SUN Wanxing, CHEN Dacang, KONG Zhe, QU Lingxiao. Plug Flow Liner Cementing Technology for Ultra Deep Well in Piedmont Tarim[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 83-86. doi: 10.3969/j.issn.1001-5620.2016.04.017
Citation: ZHUANG Jianshan, SONG Yuanhong, GAO Fei, SUN Wanxing, CHEN Dacang, KONG Zhe, QU Lingxiao. Plug Flow Liner Cementing Technology for Ultra Deep Well in Piedmont Tarim[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(4): 83-86. doi: 10.3969/j.issn.1001-5620.2016.04.017

Plug Flow Liner Cementing Technology for Ultra Deep Well in Piedmont Tarim

doi: 10.3969/j.issn.1001-5620.2016.04.017
  • Received Date: 2016-04-18
  • Publish Date: 2016-07-31
  • The well Keshen-905 is an appraisal well drilled in the middle of the block Keshen-9, Keshen gas field, the fourth interval of which was going to be cemented with liner string. The well is 7,368.2 m in depth, and has bottom hole static temperature of 164℃ and pressure of 180 MPa. Well flow and mud losses have been encountered during drilling. Narrow annular space and small difference between the formation pressure and the pressure at which mud loss will occur all contribute to lost circulation during well cementing. To ensure the quality of well cementing and prevent lost circulation, plug flow was adopted in the whole process of cementing. In field operations, cement rheology was designed and plug flow calculated. The cement slurry was designed to be used at high temperature and have salt contamination tolerance, and high density (2.58 g/cm3). A flushing spacer compatible with drilling fluid was used. Monitoring of pump pressure and the volume of cement slurry returned showed that no lost circulation had ever happened during cementing. 99.2%of the hole cemented had job quality passed the requirements.

     

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