ABSTRACT:

Numerical simulation of the fully coupled fluid-solid interaction in deforming porous media is important in many branches of science and engineering. Recently, the significance of the fluid-solid coupled on the recovery of oil reservoirs is generally recognized. The reservoir deformation due to the fluid flow during reservoir fluid production can be described by a general three-dimensional deformation field coupled with a three-dimensional fluid flow field. A fully coupled numerical model is developed based on the generalized Biot consolidation theory. For showing the application values and method on this model, a numerical example that provides formation deformation as a result of fluid withdrawal in an oil reservoir is carried out.

INTRODUCTION

The fully coupled fluid-solid interaction in a saturated deforming porous medium is important in many branches of engineering. Applications can be found in diverse areas such as geothermal energy extraction, petroleum engineering, chemical engineering, agricultural engineering, pavement engineering, hazardous waste management and biomechanics. In recent years, this topic has generated considerable attention in the field of petroleum engineering. For example, in oil production from oil reservoirs can lead to decreases in the pore pressure. This depletion results in changes of the effective stresses acting in the reservoir and in the deformation of the reservoir. Recently, the significance of the fluid-solid coupled on the recovery of reservoirs is generally recognized. In order to understand the recovery processes and correctly simulate the dynamic process of the fluids flow and the fluid distribution in oil reservoir, we must consider the complex interaction of fluid flow, changes in stress, and formation deformation as a result of injection and production operations. Due to the importance of the coupled processes, the development of continuum theories for coupled processes of fluid flow and deformation in deforming saturated media has received considerable attention in the past.

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