Open Journal of Fluid Dynamics

Volume 3, Issue 2 (June 2013)

ISSN Print: 2165-3852   ISSN Online: 2165-3860

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Drilling Operation and Formation Damage

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DOI: 10.4236/ojfd.2013.32005    6,310 Downloads   8,768 Views   Citations

ABSTRACT

Transport of particle suspensions in oil reservoirs is an essential phenomenon in many oil industry processes. Solid and liquid particles dispersed in the drilling fluid (mud) are trapped by the rock (porous medium) and permeability decline takes place during drilling fluid invasion into reservoir resulting in formation damage. The formation damage due to mud filtration is explained by erosion of external filter cake. Nevertheless, the stabilization is observed in core floods, which demonstrates internal erosion. A new mathematical model for detachment of particles is based on mechanical equilibrium of a particle positioned on the internal cake or matrix surface in the pore space. In the current work the analytical solution obtained to mud filtration with one particle capture mechanism with damage stabilization. The particle torque equilibrium is determined by the dimensionless ratio between the drag and normal forces acting on the particle. The maximum retention function of the dimensionless ratio closes system of governing equations for colloid transport through porous medium.

Cite this paper

H. Fallah and S. Sheydai, "Drilling Operation and Formation Damage," Open Journal of Fluid Dynamics, Vol. 3 No. 2, 2013, pp. 38-43. doi: 10.4236/ojfd.2013.32005.

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