In many practical cases the Radial Flow Pressure Diffusion is evolving towards pressure stabilization and can be efficiently analyzed using the pseudo-steady state flow model.
Inputs | Outputs | ||
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total sandface rate | reservoir pressure | ||
initial formation pressure | well bottomhole pressure | ||
skin-factor | |||
wellbore radius | |||
drainage radius |
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Radial fluid flow | Homogenous reservoir | Finite reservoir flow boundary | Slightly compressible fluid flow | Constant rate | Constant skin |
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Equation shows how the basic diffusion model parameters impact the relation between drawdown and total sandface flowrate and plays important methodological role as they are used in many algorithms and express-methods of Pressure Testing. It also called Dupuis
The Total Sandface Productivity Index for low-compressibility fluid and low-compressibility rocks does not depend on formation pressure, bottomhole pressure and the flowrate and can be expressed as:
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Physics / Mechanics / Continuum mechanics / Fluid Mechanics / Fluid Dynamics / Radial fluid flow / Pressure diffusion / Pressure Diffusion @model / Radial Flow Pressure Diffusion @model
Petroleum Industry / Upstream / Subsurface E&P Disciplines / Well Testing / Pressure Testing
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