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Technical references
        


PVT correlations
  • Gas
    • Z : Dranchuk, Standing, Beggs & Brill, Hall-Yarborough, Dranchuk & Abou-Kassem, Span-Wagner (CO2)
    • Viscosity : Lee et al., Carr et al., Lee compositional
  • Oil
    • Pb & RS : Lasater, Vasquez & Beggs, Standing, Glaso non volatile, Glaso volatile, Lasater-Standing, Petrosky & Farshad, Kuparuk, South brae
    • Bo : Standing, Vasquez & Beggs, Glaso, Petrosky & Farshad, Kuparuk, South brae
    • Co : Petrosky & Farshad, Vasquez & Beggs
    • Viscosity : Beggs & Robinson, Beal
  • Water
    • Rsw : Katz, Meehan & Ramey, Spivey, Haas, Culberson & McKetta
    • Bw : Gould, McCain, Meehan & Ramey, Spivey
    • Cw : Dodson & Standing, Osif
    • Viscosity : Van-Wingen & Frick, Meehan & Ramey, Helmholtz, Matthews & Russel
Pressure drop correlations
  • Artep : Liquid-Gas; mechanistic; any angle
  • Aziz & Govier : Liquid-Gas; mechanistic; vertical
  • Beggs & Brill : Liquid-Gas; empirical; any angle
  • Brauner : Liquid-Liquid stratified ; Mechanistic ; Deviated
  • Choquette : Liquid-Liquid; empirical; vertical
  • Dukler-Eaton : Liquid-Gas; empirical; horizontal
  • Duns & Ros : Liquid-Gas; empirical; vertical
  • Hagedorn-Brown : Liquid-Gas; empirical; vertical
  • Kaya et al : Liquid-Gas; mechanistic; any angle
  • Orkiszewski : Liquid-Gas; empirical; vertical
  • Petalas & Aziz : Liquid-Gas; mechanistic; any angle
  • Stanford : Liquid-Gas & 3-Phase; drift flux; any angle
  • Taitel & Dukle : Liquid-Gas; mechanistic; vertical
  • Zhang : 3-Phase stratified; mechanistic; deviated
  • Baxendell & Thomas : Liquid-Gas ; Empirical ; Vertical
  • Chierici et al : Liquid-Gas ; Empirical ; Vertical
  • Cornish : Liquid-Gas ; Empirical ; Vertical
  • Fancher & Brown : Liquid-Gas ; Empirical ; Vertical
  • Gray : Liquid-Gas ; Empirical ; Vertical
  • Griffith et al : Liquid-Gas ; Empirical ; Vertical
  • Poetmann & Carpenter : Liquid-Gas ; Empirical ; Vertical
  • Reinickle & al : Liquid-Gas ; Empirical ; Vertical
  • Hasan & Kabir : Liquid-Liquid ; Mechanistic ; Deviated
Ecrin contains an extensive range of well, reservoir and boundary models. In addition Ecrin links dynamically to user built models or to an additional and extensive ‘external model’ library that is available for download from this website.
Built-in analytical models
  • Wellbore models
    • No storage
    • Constant storage
    • Changing storage (Fair, Hegeman, Spivey packer, Spivey fissures)
  • Well models
    • Finite radius
    • Fracture - uniform flux
    • Fracture - infinite conductivity
    • Fracture - finite conductivity
    • Horizonta
    • Limited entry
    • Slanted fully penetrating
    • Slanted partially penetrating
    • Multi-fractured horizontal
    • Time dependent
  • Skin models
    • Constant
    • Rate dependant
    • Time dependant
  • Reservoir models
    • Homogeneous
    • 2-porosity P.S.S.
    • 2-porosity transient sphere
    • 2-porosity transient slab
    • 2-layer with X-flow
    • Radial composite
    • Linear composite
    • Horizontal anisotropy
  • Boundary models
    • Infinite
    • Single sealing fault
    • Single constant pressure fault
    • Closed circle
    • Constant pressure circle
    • 2 parallel faults
    • 2 intersecting faults with any angle rectangle
    • Composite rectangle
    • Leaky fault
  • Multilayer
    • Commingled production
    • Layered pi
  • Formation Testers
    • Packer-probe interference with storage and Skin
    • Probe-probe interference (0, 90, 180 °) with storage and Skin
    • Probe-probe and packer-probe interference in multi-layer reservoirs
External analytical models
  • 2-layers with X-flow & radial composite
  • 2-layers with X-flow & 2-porosity
  • 2-porosity & radial composite
  • 2-porosity with Skin at matrix blocks
  • 3-porosity (1 fissure and 2 matrices)
  • 3-layers & 4-layers with X-flow
  • 4-layers with X-flow in closed system
  • Slanted well in multi-layer reservoir
  • Conductive fault
  • Horizontal well with finite conductivity
  • Fractured horizontal well (identical of different fracs)
  • Multi-lateral well
  • Reservoir pinchout
  • 3 & 4 zones radial composite, infinite or closed circle
  • Multi-zone linear composite
  • Limited entry fracture
  • Radial composite fracture (with fracture extending beyond the composite zone)
  • Triple porosity + double porosity model
  • Triple porosity and limited entry flow model
  • Fractal reservoir
Built-in numerical models
  • User defined reservoir contour in the X-Y plane
  • Any contour segment sealed or at constant pressure
  • Inner faults with individual leakage factor
  • True double-porosity model (duplication of grids)
  • Composite regions with associated diffusivity, storativity & individual double-porosity models
  • Horizontal & vertical anisotropy
  • Varying thickness, porosity and permeability fields
  • Conductive faults
  • Multiple wells with flexible upscaling
  • Optimal upscaling
  • Fractured well with finite & infinite conductivity
  • Limited entry vertical well
  • Fractured well with limited entry
  • Fractured horizontal well
  • Changing wellbore storage (Saphir only)
  • Time-dependent & rate-dependent Skin
  • Saphir and Topaze: slightly compressible liquid
  • Non-Darcy flow for gas (NL)
  • 2-phase W-O and W-G (NL)
  • Real gas diffusion (NL)
  • Water influx (NL) : Carter-Tracy, Fetkovich, Pot, Shiltius, Numerical
  • Multilayer : crossflow, multiwell, partial completion
  • Horizontal and limited entry wells in multilayer
  • Fractured well in multilayer
  • Composite multilayer
  • Gas desorption (with or without diffusion)
  • Unconsolidation in fractures and/or matrix
  • Thermal single phase & multiphase modeling (Rubis)