Volume 42 Issue 4
Jul.  2025
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2025  >  42(4): 503-508
WANG Guangcai, LIU Wancheng, REN Yun, et al.A highly inhibitive low activity brine-based drilling fluid[J]. Drilling Fluid & Completion Fluid，2025, 42（4）：503-508 doi: 10.12358/j.issn.1001-5620.2025.04.009
Citation: WANG Guangcai, LIU Wancheng, REN Yun, et al.A highly inhibitive low activity brine-based drilling fluid[J]. Drilling Fluid & Completion Fluid，2025, 42（4）：503-508 doi: 10.12358/j.issn.1001-5620.2025.04.009
shu

A Highly Inhibitive Low Activity Brine-Based Drilling Fluid

doi: 10.12358/j.issn.1001-5620.2025.04.009
  • 1.

    College of Petroleum Engineering, Yangtze University, Wuhan, Hubei 430100

  • 2.

    Oil Production Technology Research Institute of Petro China Tuha Oilfield, Hami, Xinjiang 839009

  • 3.

    Exploration company of Petro China Tuha Oilfield, Hami, Xinjiang 839009

  • 4.

    Engineering Technology Research Institute, BHDC, Tianjin 300451

  • Received Date: 2025-02-10
  • Rev Recd Date: 2025-03-17
  • Publish Date: 2025-07-31
    Abstract
  • As a new type of drilling fluid, bring-based drilling fluid manifests its significance in replacing oil-based and conventional water-based drilling fluids. To deal with the serious borehole wall collapse and reservoir protection problems encountered in drilling the Permian system reservoir in Tuha oilfield, a chloride brine was chosen as the base fluid for drilling fluid development. By selecting high efficiency drilling fluid additives, a highly inhibitive low solids low activity brine-based drilling fluid was formulated. This drilling fluid has simple composition and strong inhibitive capacity. Laboratory researches show that this drilling fluid has good high temperature stability and contamination resistance, and results of corrosion test with steel plate and rubber satisfy the standard requirements. This drilling fluid was successfully used in the Qitan-1 block in Tuha oilfield, the average percent hole enlargement of the target zone sections was 3.44%, and no downhole troubles were encountered during drilling, demonstrating that the highly inhibitive low solids low activity brine-based drilling fluid can satisfy the requirements of drilling in the Permian basin. The application of the chloride brine-based drilling fluid is the first in China, and is worth further optimization and promotion.

     

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