Volume 36 Issue 6
Dec.  2019
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LIU Kecheng, XU Shengjiang, RONG Kesheng, WANG Gui, GONG Jiaqin, PU Xiaolin. Calculation of the Rheological Parameters of Drilling Fluids with Particle Lost Circulation Materials[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(6): 683-688. doi: 10.3969/j.issn.1001-5620.2019.06.004
Citation: LIU Kecheng, XU Shengjiang, RONG Kesheng, WANG Gui, GONG Jiaqin, PU Xiaolin. Calculation of the Rheological Parameters of Drilling Fluids with Particle Lost Circulation Materials[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(6): 683-688. doi: 10.3969/j.issn.1001-5620.2019.06.004

Calculation of the Rheological Parameters of Drilling Fluids with Particle Lost Circulation Materials

doi: 10.3969/j.issn.1001-5620.2019.06.004
  • Received Date: 2019-08-19
  • Publish Date: 2019-12-30
  • Addition of lost circulation materials (LCMs) while drilling in a drilling fluid will inevitably affect the rheology of the drilling fluid in circulation. The clearance between the rotator and the stator of an API standard viscometer is too narrow to measure the rheology of a drilling fluid containing coarse LCMs. To address this problem, a method of calculating the rheological parameters of a drilling fluid containing particle LCMs was developed based on the combination of laboratory experiment and inverse problem mathematical model. Using the method, the viscometer readings and the rotational speeds can be turned into a relationship between shear stress and shear rate. Laboratory experimental results showed that the calculation method is reliable, a KCl-polymer mud containing particle LCMs had a rheological curve conforming to H-B model. Increasing the concentration of the LCMs in the drilling fluid significantly affected the rheological parameters of the drilling fluid. Attention should be paid to the fact that particle size and concentration of LCM both have significant effects on the rheology of the drilling fluid.

     

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