Volume 32 Issue 6
Nov.  2015
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2015  >  32(6): 22-25
ZHAO Hu, SI Xiqiang, ZHEN Jianwu, XIE Jun, WANG Zhongjin. Study on Adaptability of Calcium Chloride- Alkyl Polyglucoside Drilling Fluids to Shale Gas Horizontal Drilling[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(6): 22-25. doi: 10.3969/j.issn.1001-5620.2015.06.006
Citation: ZHAO Hu, SI Xiqiang, ZHEN Jianwu, XIE Jun, WANG Zhongjin. Study on Adaptability of Calcium Chloride- Alkyl Polyglucoside Drilling Fluids to Shale Gas Horizontal Drilling[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(6): 22-25. doi: 10.3969/j.issn.1001-5620.2015.06.006
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Study on Adaptability of Calcium Chloride- Alkyl Polyglucoside Drilling Fluids to Shale Gas Horizontal Drilling

doi: 10.3969/j.issn.1001-5620.2015.06.006

  • No. 462 Zhongyuan Road, Hualong District, Puyang City, Henan 457001, China

  • Received Date: 2015-04-08
  • Publish Date: 2015-11-30
    Abstract
  • Calcium chloride(CaCl2)-Alkyl polyglucoside(APG) drilling fluids have low water activities compatible with the water activities in shale formations, and this makes it easy to reach osmotic equilibrium between the drilling fluids and the shale formations, In hot rolling tests, the first and secondary shale cuttings recoveries of the CaCl2-APG drilling fluids are higher than 90%, almost the same as that of oil base muds.Shale crops from Block Jiaoshiba have their strengths slightly reduced after soaking in the CaCl2-APG drilling fluids.CaCl2-APG drilling fluids of 1.20-2.00 g/cm3 have extreme friction coefficient the same as that of oil base muds.CaCl2-APG drilling fluids, afteragingfor 72 hours at 130℃, still retain their properties.When contaminated with drill cuttings at concentrations less than 15%, the properties of the drilling fluids still keep stable.Laboratory study shows that the CaCl2-APG drilling fluids are suitable for use in shale gas horizontal drilling in Jiaoshiba.

     

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