Volume 39 Issue 5
Jan.  2023
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2022  >  39(5): 558-564
MA Lei, YUAN Xueqiang, ZHANG Wandong, et al.A synthetic based drilling fluid with strong plugging capacity for block Wushi17-2[J]. Drilling Fluid & Completion Fluid，2022, 39（5）：558-564 doi: 10.12358/j.issn.1001-5620.2022.05.005
Citation: MA Lei, YUAN Xueqiang, ZHANG Wandong, et al.A synthetic based drilling fluid with strong plugging capacity for block Wushi17-2[J]. Drilling Fluid & Completion Fluid，2022, 39（5）：558-564 doi: 10.12358/j.issn.1001-5620.2022.05.005
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A Synthetic Based Drilling Fluid with Strong Plugging Capacity for Block Wushi17-2

doi: 10.12358/j.issn.1001-5620.2022.05.005
  • 1.

    Zhanjiang Branch of CNOOC Ltd., Zhanjiang, Guangdong 524051

  • 2.

    China University of Petroleum (Beijing), MOE Key Laboratory of Petroleum Engineering, Beijing102239

  • Received Date: 2022-04-04
  • Accepted Date: 2022-05-14
  • Rev Recd Date: 2022-04-26
  • Publish Date: 2023-01-10
    Abstract
  • The block Wushi17-2 is an important part of the Nanhai West Oilfield and has significant exploration and development prospects. However, there are severe potential downhole problems encountered during drilling operations, such as borehole wall instability, mud losses and formation damage, has imposed serious challenges to the properties of drilling fluids. Since this block is located nearby a national nature reserve, the environmental friendly performance of drilling fluids remains a great challenging. To deal with these problems, this study proposes the research idea of formulating high performance synthetic based drilling fluid with gas-to-liquid (GTL), followed by optimizing with a primary emulsifier, a secondary emulsifier and a high efficiency plugging agent OSD-2, eventually formulating a synthetic based drilling fluid with a density of 1.5 g/cm3, a temperature resistance of 150 ℃, a high temperature high pressure filtration rate of less than 5 mL and an electric stability of greater than 400 V. The synthetic based drilling fluid has excellent rheology, lubricity, inhibitive capacity and resistance to clay contamination (resistant to contamination of 10% poor-quality clay). The synthetic based drilling fluid satisfied the demands of field operation and helped to solve drilling fluid-related problems during drilling process.

     

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