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- W4378229726 abstract "Summary The application of geomechanics in drilling planning is essential for the maintenance of the stability of wellbores and proceeding against instability problems. This paper presents an analytical solution as well as the FALC3D numerical finite difference method for the wellbore stability problem on the basis of a plasticity Mohr-Coulomb model and under non-axisymmetric loading. The analytical solution provides formulations for determining stress distributions and the development of the plastic zone along the minimum horizontal stress direction. Parametric analyses are then executed to illustrate the impressions of the wellbore pressure, friction angle, and cohesion on the stress distributions and predominantly the plastic zone progress. In particular, due to the importance of stabilizing the wellbore from collapsing through the supporting wellbore pressure, two various collapse criteria are also addressed to obtain numerically and analytically the required critical drilling fluid density (wellbore pressure). All observations of this study from the comparisons demonstrate that the analytical solution is in quite good agreement with FLAC3D numerical results, which, consequently, affirm the accuracy and applicability of the present analytical solution and the finite difference model. Furthermore, those reveal that the wellbore pressure varies the plastic region dimension most considerably compared to the friction angle and cohesion." @default.
- W4378229726 created "2023-05-26" @default.
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- W4378229726 date "2023-01-01" @default.
- W4378229726 modified "2023-09-30" @default.
- W4378229726 title "Analytical and Numerical Analyses of Wellbore Stability Problem Using a Plasticity Model" @default.
- W4378229726 doi "https://doi.org/10.3997/2214-4609.202310883" @default.
- W4378229726 hasPublicationYear "2023" @default.
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