Abstract
This chapter describes the characteristics of the flow of fluids through porous geological materials. The flow of compressible and incompressible fluids through porous rocks is described by Darcy's law and its derivatives. Steady-state and pseudosteady-state flow rate equations are derived, using Darcy's law for linear and radial flow of compressible and incompressible fluids. These equations are primarily used to predict the production performance of oil and gas reservoir systems of simple geometry. Only the two most practical geometries, that is, the linear flow and the radial flow systems, are investigated. The concepts of friction factor of porous rocks and turbulence factor are discussed and illustrated with several examples. The chapter concludes with a brief discussion of layered and composite reservoirs. Most concepts are illustrated with numerical examples. Many exercises are included at the end of the chapter.
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