Volume 32 Issue 2
Mar.  2015
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YUAN Haiping, WANG Zhaohui, GAO Baokui, REN Rui. Erodability of False Filter Cake on Borehole Wall During Well Cementing[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 67-71. doi: 10.3969/j.issn.1001-5620.2015.02.018
Citation: YUAN Haiping, WANG Zhaohui, GAO Baokui, REN Rui. Erodability of False Filter Cake on Borehole Wall During Well Cementing[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(2): 67-71. doi: 10.3969/j.issn.1001-5620.2015.02.018
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Erodability of False Filter Cake on Borehole Wall During Well Cementing

doi: 10.3969/j.issn.1001-5620.2015.02.018

  • Department of Well Cementing and Well Completion, Building A of Block A34, Innovation Base of PetroChina, West of Xishatun Bridge, Shahe Town, Changping District, Beijing 102206, China

  • Received Date: 2014-12-05
  • Publish Date: 2015-03-31
    Abstract
  • False filter cake on borehole wall has great influence on the job quality of well cementing, often causing the cementation of the interface between cement sheath and borehole wall to become deteriorated, and resulting in fluid channeling. The shear stress on the borehole wall caused by cement slurry in eccentric annular space is analyzed. With the help of river sediment flow dynamics in hydraulic engineering, the critical starting shear stress necessary for the removal of filter cake is calculated. By comparing these two shear stresses in annular space, the erodability of false filter cake in the whole annular space can be determined. It is shown that the particle size distribution and the thickness of filter cake greatly affect the erodability of the filter cake, and the eccentricity of casing string also plays a role in this aspect.

     

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