GLOSSARY

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In majority of practical well tests the pressure diffusion in multi-phase segregation of reservoir flow the pressure response can be approximated by single-phase pressure diffusion model with a specific from of fluid/reservoir properties.


This approximation can be done in one of three ways:


Linear Perrine multi-phase diffusion


the simplest multi-phase fluid model

although it has a 3-phase form it normally works for oil-water system only



Pseudo-linear multi-phase diffusion


this model is capable to account for highly compressible multi-phase fluid components (light oil, condensate and gas) and

  • in case of high drawdown it does not model pressure accurately both in near and far reservoir zone

  • requires analyst to select a reference pressure point where the pressure simulation will be more accurate



Non-linear multi-phase diffusion


this multi-phase fluid model covers a wide range of 2-phase and 3-phase models in a wide range of pressure variations and

  • it does not account for capillary pressure

  • it does bot cover the segregated gas-liquid reservoir flow

See also

Pressure diffusion / Pressure Diffusion @model



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