Volume 38 Issue 2
Aug.  2021
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LIU Wei, MAO Lijun, OUYANG Wei. Research on Plugging Technology of Shale Gas Oil-Based Crosslinking Solidification[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 207-211. doi: 10.3969/j.issn.1001-5620.2021.02.013
Citation: LIU Wei, MAO Lijun, OUYANG Wei. Research on Plugging Technology of Shale Gas Oil-Based Crosslinking Solidification[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 207-211. doi: 10.3969/j.issn.1001-5620.2021.02.013
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Research on Plugging Technology of Shale Gas Oil-Based Crosslinking Solidification

doi: 10.3969/j.issn.1001-5620.2021.02.013

  • 1. Sichuan Key Laboratory of Oil and Gas Field Applied Chemistry, Guanghan, Sichuan 618300;

  • 2. Drilling & Production Research Institute, CCDC, Guanghan, Sichuan 618300;

  • 3. China Petroleum Engineering & Construction Co., Ltd. Southwest Branch, Chengdu, Sichuan 610041

  • Received Date: 2020-12-22
    Abstract
  • Shale gas stream the dragon group, mainly using oil-base drilling fluid microfracture stratum itself development, drilling fluid density is high, easy to generate induced cracks, oil-base drilling fluid leakage occurs, produce the huge economic losses, at home and abroad research on mechanism of oil-base drilling fluid leakage is less, oil-base drilling fluid plugging material varieties for a single, technology is not mature,Oil-based plugging has become a technical problem at home and abroad.The characteristics and mechanism of oil base drilling fluid loss in Longmaxi Formation were studied and analyzed. According to the mechanism of oil base drilling fluid loss, two kinds of cross-linking curing plugging agents CQ-HM1 and CQ-HM2 at different temperatures were developed to form the formula of oil base drilling fluid cross-linking curing plugging slurry. The formula was cured within 70-90 min at 100-150 ℃.The sealing effect is achieved, and the bearing capacity of the 5 mm joint plate is more than 6.0 MPa.Finally, the oil based drilling fluid crosslinking solidification plugging technology was formed.

     

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