Poromechanics Response of Inclined Wellbore Geometry in Fractured Porous Media |
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Authors: | Younane Abousleiman Vinh Nguyen |
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Affiliation: | 1Larry Brummett/ONEOK Chair Professor, Mewbourne School of Petroleum & Geological Engineering, and School of Civil Engineering & Environmental Science, The Univ. of Oklahoma, SEC, Suite P119, 1000 East Boyd St., Norman, OK 73019-1014 (corresponding author). E-mail: yabousle@ou.edu 2PhD Student, Mewbourne School of Petroleum & Geological Engineering, and Graduate Research Assistant, PoroMechanics Institute, The Univ. of Oklahoma, SEC, Suite P119, 1000 East Boyd St., Norman, OK 73019-1014. E-mail: nxvinh@ou.edu
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Abstract: | This paper presents the poromechanics/poroelastic analytical solution for stress and pore pressure fields induced by the action of drilling and/or the pressurization of an inclined/horizontal wellbore in fractured fluid-saturated porous media, or naturally fractured fluid-saturated rock formations. The model which is developed within the framework of the coupled processes in the dual-porosity/dual-permeability approach accounts for coupled isothermal fluid flow and rock/fractures deformation. The solution to the inclined/horizontal wellbore problem is derived for a wellbore drilled in an infinite naturally fractured poroelastic medium, subjected to three-dimensional in situ state of stress and pore pressure. The dual-porosity analytical solution is first reduced to the limiting single-porosity case and verified against an existing single-porosity solution. A comparison between single-porosity and dual-porosity poroelastic results is conducted and displayed in this work. Finally, wellbore stability analyses have been carried out to demonstrate possible applications of the solution. |
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Keywords: | Fractures Rocks Porous media Geometry Drilling |
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