Volume 33 Issue 1
Jan.  2016
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QIU Zhengsong, LI Zhaochuan, HUANG Wei'an, MAO Hui, ZHONG Hanyi, QIU Yongping. Low Temperature Rheology of Clay-free Seawater Base Drilling Fluids[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(1): 42-47. doi: 10.3969/j.issn.1001-5620.2016.01.009
Citation: QIU Zhengsong, LI Zhaochuan, HUANG Wei'an, MAO Hui, ZHONG Hanyi, QIU Yongping. Low Temperature Rheology of Clay-free Seawater Base Drilling Fluids[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(1): 42-47. doi: 10.3969/j.issn.1001-5620.2016.01.009
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Low Temperature Rheology of Clay-free Seawater Base Drilling Fluids

doi: 10.3969/j.issn.1001-5620.2016.01.009

  • College of Petroleum Engineering, China University of Petroleum(East China), Qingdao Shandong 266580, China

  • Received Date: 2015-11-25
  • Publish Date: 2016-01-30
    Abstract
  • A clay-free seawater base drilling fluid of excellent low temperature rheology was prepared for use in offshore drilling where low temperature viscosification of drilling fluids was frequently encountered. Additives used in the drilling fluid have been optimized on self-made deep water drilling fluid simulation device. This fluid has good low temperature rheology after aging at 130℃. Before and after aging, the ratios of apparent viscosity at 4℃ and 25℃ are 1.179 and 1.250, respectively, the ratios of plastic viscosity at 4℃ and 25℃ are 1.167 and 1.240, respectively, and the ratios of yield point at 4℃ and 25℃ are 1.200 and 1.265, respectively. This fluid has stable gel strengths. The PV/YP ratio is in a range of 0.625-0.694 Pa/(mPa·s), the API filter loss is about 9.0 mL, the coefficient of friction is 0.181, percent shale swelling is 10.0%, and percent shale cuttings recovery in hot rolling test is 87.0%. This fluid also helps protect reservoirs and prevent the generation of gas hydrate.

     

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