Volume 43 Issue 5
Oct.  2026
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Zhu Xiuyu.Progress in technical research on emulsifiers for low O/W ratio oil-based drilling fluids[J]. Drilling Fluid & Completion Fluid，2026, 43（5）：577-583 doi: 10.12358/j.issn.1001-5620.2026.05.001
Citation: Zhu Xiuyu.Progress in technical research on emulsifiers for low O/W ratio oil-based drilling fluids[J]. Drilling Fluid & Completion Fluid，2026, 43（5）：577-583 doi: 10.12358/j.issn.1001-5620.2026.05.001
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Progress in Technical Research on Emulsifiers for Low O/W Ratio Oil-Based Drilling Fluids

doi: 10.12358/j.issn.1001-5620.2026.05.001
  • 1.

    Engineering and Technology Research Institute of Daqing Drilling Engineering Company, Daqing, Heilongjiang 163411

  • 2.

    Multi Resource Collaboration National Key Laboratory of Green Extraction of Continental Shale Oil, Daqing, Heilongjiang 163411

  • 3.

    National Engineering Research Center of Oil & Gas Drilling and Completion Technology, Daqing, Heilongjiang 163411

  • Received Date: 2026-03-11
  • Rev Recd Date: 2026-04-24
  • Publish Date: 2026-10-01
    Abstract
  • Oil-based drilling fluids in recent years have been widely used in drilling high-temperature deep wells, ultra-deep wells, strongly water-sensitive shales and salt-rock formations, as well as complexly-structured wells demanding high lubricity such as extended-reach horizontal wells, fishbone-type wells and multilateral wells. However, oil-based drilling fluids cause serious environmental pollution, and their application is also restricted by these factors such as high cost and the availability of core additives (such as emulsifiers). Using low oil/water ratio oil-based drilling fluids, the cost can be significantly reduced, the requirements for the performance of emulsifiers are stringent though. In recent years, research efforts both in China and abroad have been devoted to the development of high-performance emulsifiers and a series of low oil/water ratio oil-based drilling fluids have been developed. This paper reviews the emulsifier technology for low oil/water ratio oil-based drilling fluids and oil-based drilling fluids of different oil/water ratios both in China and abroad, and analyzes the research progress and existing challenges encountered in the development of low oil/water ratio oil-based drilling fluids to try to provide a guidance for the future research and development of this drilling fluid technology.

     

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