Volume 36 Issue 5
Oct.  2019
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SUN Yuxue, LI Chengli, BAI Xiangshuang, ZHANG Lichun, ZHAO Jingyuan, GUO Chunping. Study on Factors Affecting Filtration Property of Drilling Fluid with Numerical Simulation Software[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(5): 581-586,593. doi: 10.3969/j.issn.1001-5620.2019.05.010
Citation: SUN Yuxue, LI Chengli, BAI Xiangshuang, ZHANG Lichun, ZHAO Jingyuan, GUO Chunping. Study on Factors Affecting Filtration Property of Drilling Fluid with Numerical Simulation Software[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(5): 581-586,593. doi: 10.3969/j.issn.1001-5620.2019.05.010

Study on Factors Affecting Filtration Property of Drilling Fluid with Numerical Simulation Software

doi: 10.3969/j.issn.1001-5620.2019.05.010
  • Received Date: 2019-06-12
  • Publish Date: 2019-10-30
  • Numerical simulation software is used to simulate the dynamic fluid loss of drilling fluid during drilling under formation conditions. The effects of filtration time, viscosity of filtrate, differential pressure, permeability of internal mud cake and permeability of external mud cake on the filtration rate of drilling fluid was studied. It was found through the simulation that when the permeability of formation was 100 mD and the permeability of the external mud cake was less than 0.01 mD, more than 90% of the pressure was contained by the external mud cake, and the external mud cake is the main factor affecting the filtration rate of a drilling fluid. When the permeability of the external mud cake was greater than 0.1 mD, 55% of the pressure was contained by the external mud cake, the permeability of the internal mud cake and the formation all contributed to the dynamic filtration rate of the drilling fluid. Under the simulated conditions, the pressure was transmitted to the boundary of the formation quickly, the formation pressure at the same place inside the formation increased gradually and slightly with time, and the filtration rate was basically a constant. From the simulation it can be found that filtration rate is in direct proportion to filtration time, and pressure, and is in reverse proportion to the viscosity of the filtrate of a drilling fluid. The filtration rate, although increases with the permeability of the external mud cake, is not linearly proportional to it.

     

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