Volume 40 Issue 6
Dec.  2023
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2023  >  40(6): 711-717
ZHANG Wei, QIU Shixin, ZHANG Shuo, et al.A polymeric microsphere OBM-1 for oil based drilling fluids[J]. Drilling Fluid & Completion Fluid，2023, 40（6）：711-717 doi: 10.12358/j.issn.1001-5620.2023.06.003
Citation: ZHANG Wei, QIU Shixin, ZHANG Shuo, et al.A polymeric microsphere OBM-1 for oil based drilling fluids[J]. Drilling Fluid & Completion Fluid，2023, 40（6）：711-717 doi: 10.12358/j.issn.1001-5620.2023.06.003
shu

A Polymeric Microsphere OBM-1 for Oil Based Drilling Fluids

doi: 10.12358/j.issn.1001-5620.2023.06.003
  • 1.

    Drilling Fluid Branch Company of WDEC Limited, Karamay, Xinjiang 834000

  • 2.

    National Engineering Research Center for Oli & Gas Drilling and Completion Technology· China University of Petroleum (Beijing), Beijing 102249

  • Received Date: 2023-05-02
  • Rev Recd Date: 2023-06-11
  • Publish Date: 2023-12-30
    Abstract
  • Serious losses of oil based drilling fluids during drilling greatly affect the time efficiency of the drilling operation and the economic benefits of oil and gas development. Lost circulation materials presently in use are almost all developed for use in water based drilling fluids and thus have deficiencies for use in oil based drilling fluids. A polymeric microsphere OBM-1 for oil based drilling fluids was synthesized through inverse emulsion polymerization and organophilic groups were introduced into the molecules of the final product. OBM-1, a basically spherical material, has particle sizes between 1 μm and 100 μm, and disperses very well in oil based drilling fluids. An oil based drilling fluids treated with 3% OBM-1 has stable rheology and reduced medium pressure filtration rate and high temperature high pressure filtration rate. High temperature high pressure test results show that the higher the temperature, the better the filtration control performance of OBM-1. Test results of plugging under pressure with OBM-1 show that OBM-1 can plug the fractures of 5-40 μm under 15 MPa. Lost circulation test results show that OBM-1 can plug quartz sand-beds of 20-40 mech under 15 MPa. In field application, OBM-1 can effectively reduce the volume of mud lost, the well drilled with an oil based drilling fluid treated with OBM-1 has mud consumption that was reduced by 30.3%, greatly saved the drilling cost. This study has provided a strong technical support for safe and efficient drilling with oil based drilling fluids.

     

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