Volume 41 Issue 4
Sep.  2024
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HAI Bo, LIN Xingjie, ZHONG Cheng, et al.Development and application of a high-strength equilateral tetrahedron resin solidifiable lost circulation material[J]. Drilling Fluid & Completion Fluid,2024, 41(4):481-488 doi: 10.12358/j.issn.1001-5620.2024.04.009
Citation: HAI Bo, LIN Xingjie, ZHONG Cheng, et al.Development and application of a high-strength equilateral tetrahedron resin solidifiable lost circulation material[J]. Drilling Fluid & Completion Fluid,2024, 41(4):481-488 doi: 10.12358/j.issn.1001-5620.2024.04.009

Development and Application of a High-Strength Equilateral Tetrahedron Resin Solidifiable Lost Circulation Material

doi: 10.12358/j.issn.1001-5620.2024.04.009
  • Received Date: 2024-02-15
  • Rev Recd Date: 2024-03-27
  • Publish Date: 2024-09-30
  • Lost circulation during drilling is a downhole problem frequently encountered in the Chuanyu area, and in part of the area, severe lost circulation encountered in complex formations can only be cured after several times of operation and with different lost circulation control techniques, resulting in high drilling cost. By analyzing the lost circulation control techniques used in the past, a one-sack temperature-control gel-type resin lost circulation material (LCM) YDFD was developed based on the principles of bridging and packing in fractures. The raw materials in producing the LCM YDFD include a high-strength equilateral tetrahedron resin as the main bridging material, a flaky resin and a thermo-set resin as the packing material, and a fiber material, and these three materials, by entanglement crosslinking, produce the final product YDFD. In lost circulation control, three models of YDFD, which are small, medium and large, are mixed in a certain ratio to combat mud losses of different rates such as mud losses into small fractures, vugs, big fractures and another type of mud loss called breathing loss. Into the LCM slurry a temperature control agent is used to regulate the time required for the LCM slurry to solidify, thereby ensuring safe operation and accurate plugging of the channels into which mud is lost. In controlling lost circulation with the YDFD LCM in the Chuanyu area, 93% mud losses are successfully brought under control in the first try. This technique is worth trying in combating mud losses in oil and gas development.

     

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