Volume 37 Issue 4
Aug.  2020
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LU Baoping. Optimization of Drilling Fluid Rheology Based on Formation Characteristics and Annular State[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 438-443. doi: 10.3969/j.issn.1001-5620.2020.04.006
Citation: LU Baoping. Optimization of Drilling Fluid Rheology Based on Formation Characteristics and Annular State[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(4): 438-443. doi: 10.3969/j.issn.1001-5620.2020.04.006

Optimization of Drilling Fluid Rheology Based on Formation Characteristics and Annular State

doi: 10.3969/j.issn.1001-5620.2020.04.006
  • Received Date: 2020-02-15
  • Publish Date: 2020-08-28
  • Optimization of drilling fluid rheology plays an important role in the safe, high quality and efficient drilling. Presently there is no systematic, scientific and quantified optimization theory and method available for drilling fluid rheology optimization. This paper presents an optimization and design principle, that is, the rheology of the drilling fluid should not only be suitable for operation on the formations to be drilled, it should also help maintain the annular space in good state. Different rheological models were presented for different drilling fluid formulations. A theory and a method which stated that optimization of drilling fluid rheology should be based on the formation to be drilled and the state of the annular spaces were established based on the characterization of the state of annular space with three parameters, which are, index of borehole wall erosion, rate of cuttings transportation in annular space and dynamic annular pressure coefficient. The study has provided a new theory and new technology for quantified optimization of drilling fluid rheology and field optimization of drilling fluids.

     

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