Volume 33 Issue 2
Mar.  2016
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LU Feifei, WANG Yonghong, LIU Yun, LI Fei, BAN Shengfu, ZHU Wenhao. Anti-channeling HTHP Liner Cementing Technologies Used in Block Shunnan[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(2): 88-91,95. doi: 10.3969/j.issn.1001-5620.2016.02.019
Citation: LU Feifei, WANG Yonghong, LIU Yun, LI Fei, BAN Shengfu, ZHU Wenhao. Anti-channeling HTHP Liner Cementing Technologies Used in Block Shunnan[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(2): 88-91,95. doi: 10.3969/j.issn.1001-5620.2016.02.019

Anti-channeling HTHP Liner Cementing Technologies Used in Block Shunnan

doi: 10.3969/j.issn.1001-5620.2016.02.019
  • Received Date: 2015-12-09
  • Publish Date: 2016-03-31
  • Ultra-high formation temperatures,complex formation pressure system,active formation gases have long resulted in difficulties in well cementing,such as gas channeling and poor cementing job quality.Studies on HTHP anti-channeling cementing optimization reveal that 0.18 mm,0.125 mm and 0.09 mm silica sand can be used in cementing slurries to solve the decreasing of HTHP strengths of set cement at 178℃.Latex cement slurry,when treated with active SiO2 water suspension,has enhanced gas channeling control performance.Addition of fibers in latex cement slurry reduces the elastic modulus of the set cement by 48%,greatly improving the impact resistance of the set cement.Right-angle thickening set cement has better gas channeling control.To prevent the column of the cement slurry from losing weight,therefore destabilizing the gas zones to be cemented,reverse circulation after mud displacement should be carried out and pressurize the annulus as soon as possible,a way to effectively control gas channeling.High temperature gastight cementing tools and accessories will also help control gas channeling.Using technologies,gas-channeling control in cementing of the φ177.8 mm liner string has been successfully realized in the Block Shunnan.These technologies are of importance to gaschanneling control in HTHP well cementing in the block.

     

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