Volume 37 Issue 2
Apr.  2020
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2020  >  37(2): 174-179
LI Guanghuan, LONG Tao, ZHOU Tao, SONG Jianming, HUO Baoyu, LI Yanqiao. Drilling Fluid Technology for Exploration and Development of Shale Oil in South of Dagang Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(2): 174-179. doi: 10.3969/j.issn.1001-5620.2020.02.007
Citation: LI Guanghuan, LONG Tao, ZHOU Tao, SONG Jianming, HUO Baoyu, LI Yanqiao. Drilling Fluid Technology for Exploration and Development of Shale Oil in South of Dagang Oilfield[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(2): 174-179. doi: 10.3969/j.issn.1001-5620.2020.02.007
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Drilling Fluid Technology for Exploration and Development of Shale Oil in South of Dagang Oilfield

doi: 10.3969/j.issn.1001-5620.2020.02.007

  • 1. Tianjin Key Laboratory of Drilling Fluids under Complex Conditions, Tianjin 300280;

  • 2. College of Material Science and Engineering, Guangdong University of Petrochemical Technology, Maoming, Guangdong 525000;

  • 3. Drilling Fluid Technology Services of CNPC Bohai Drilling Engineering Company Limited, Tianjin 300280;

  • 4. Research Institute of Engineering Technology of CNPC Bohai Drilling Engineering Company Limited, Renqiu, Hebei 062550

  • Received Date: 2019-12-02
  • Publish Date: 2020-04-28
    Abstract
  • Wellbore instability is a problem encountered in shale oil horizontal drilling in Cangdong block in the south of Dagang oilfield. To address this problem, the geological features of the Cangdong block, the operation difficulties and the mechanisms of borehole wall collapse were analyzed, and three key drilling fluid additives (shale inhibitor, plugging agent and lubricant) were selected to formulate a BH-KSMShale drilling fluid for shale oil development. Laboratory evaluation of this drilling fluid showed that the drilling fluid had good properties; it functioned properly 150℃, and the HTHP filtration rate was less than 10 mL. Four wells, well **701H, well **702H, well **1-2H and well **2H, in the south of Dagang oilfield were drilled using the BH-KSMShale drilling fluid. The drilling operation was performed smoothly, and there was no downhole trouble occurred during drilling. The maximum percent hole enlargement was only 8.67%. The BH-KSMShale drilling fluid is very suitable for the shale oil drilling in the south of Dagang oilfield; with this drilling fluid, the borehole wall collapse in horizontal drilling is avoided and it will find wide application in the future in shale oil development in Dagang.

     

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