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1. petrowiki.spe.org › Relative_permeability_modelsRelative permeability models - PetroWiki

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   Jan 19, 2016 · gas exponent for modified Brooks-Corey functions n o = oil exponent for modified Brooks-Corey functions n w = water exponent for modified Brooks-Corey functions N = number of laminations N c = capillary number P c = capillary pressure, m/Lt 2, psi P cgo = capillary pressure between gas and oil phases, m/Lt 2, psi P cow =

2. www.sciencedirect.com › oil-relative-permeabilityOil Relative Permeability - an overview | ScienceDirect Topics

   www.sciencedirect.com › oil-relative-permeability

   n pg = exponent of the capillary pressure curve in gas-oil system (p c ) S lc = capillary pressure at critical liquid saturation. The exponents and coefficients of Equations 5-22 through 5-26 are usually determined by the least-squares method to match the experimental or field relative permeability and capillary pressure data.

3. People also ask

   What is the relationship between oil (no) and gas (NG) Corey exponents?

   • The relationship between the oil (No) and gas (Ng) Corey exponents is normally quite well defined (compared to water–oil Corey exponents where changes in wettability play a more influential role), since the oil is always the wetting phase, so No is much larger than Ng. Typical ranges for both are:

   Relative Permeability - ScienceDirect

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   What is the range of Corey exponents for gas relative permeability?

   • The range of Corey exponents for gas relative permeability is relatively narrow (1.3–3.0) as gas is non-wetting. 4. In the absence of reliable relative permeability data, gas–oil curves can be invented using a Corey approach and sensitivities to Sgc, Srog, krg′ evaluated ( Section 10.5.7 ). 10.8.2. Gas and Gas Condensate Reservoirs 10.8.2.1.

   Relative Permeability - ScienceDirect

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   What are the Corey equations for relative gas and oil permeability?

   • J Pet Technol 20 (10): 1111–1113. The Corey equations for relative gas and oil permeability and the gas-oil relative permeability ratio are: where SL is the total liquid saturation and equal to 1 minus the gas saturation (1 - Sg), and where Sm and SLR are constants.

   Graphical Determination of the Constants in the Corey ... - OnePetro

   onepetro.org/JPT/article/20/10/1111/164672/Graphical-Determination-of-the-Constants-in-the

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   What is Corey exponent?

   • The exponent \\ (\\lambda \\) is lithology and wettability dependent and often referred to in the literature as Corey exponent as well as the model itself. The model has been proven theoretically by Li ( 2010) from fractal modelling of a porous medium.

   An Experimental and Numerical Study of Relative Permeability ... - Sprin…

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4. www.sciencedirect.com › science › articleRelative Permeability - ScienceDirect

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   Jan 1, 2015 · Gas–Oil Systems. A Corey-type approach can also be used to characterise gas–oil curves. Relative permeability to oil can be expressed as: k r o k r o ′ = kron = Son No and gas relative permeability by: k r g = S g n N g, where krg is referenced to Ko′ at Swir.

5. onepetro.org › JPT › articleGraphical Determination of the Constants in the Corey ...

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   The Corey equations for relative gas and oil permeability and the gas-oil relative permeability ratio are: SL − SLR 2 SL − SLR 2krg = 1 − 1 − Sm − SLR 1 − SLR. (1) SL − SLR 4kro = 1 − SLR. (2) SL − SLR 2 SL − SLR 21 − 1 − krg Sm − SLR 1 − SLR=kro SL − SLR 4 1 − SLR. (3)

   • Author: Carl E. Johnson

   • Publish Year: 1968

6. iopscience.iop.org › article › 10A simple approach IOP format - IOPscience

   iopscience.iop.org › article › 10

   3.2. Corey’s model Corey proposed a simple mathematical expression for generating relative-permeability data of a gas-oil system [10, 15]. After replacing oil by water in Corey’s model, the gas/water relative permeability ratio will be: * 4 * 3 * (1) ( 2) g g g rw rg S S K K − − = (4) where wc g g S S S − = 1 *, and S g is gas ...

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8. onepetro.org › books › bookNodal Analysis of Oil and Gas Production Systems - OnePetro

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   Corey Expressions Relative permeabilities are strongly dependent on formation and fluid properties and should therefore ideally be determined from laboratory experiments, in particular from coreflooding tests.

9. link.springer.com › article › 10An Experimental and Numerical Study of Relative ... - Springer

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   Apr 4, 2017 · Experimental and simulated relative permeability curves of the water phase derived from \(T_1\) distributions show a good match of corresponding Corey fit exponents, \(n_\mathrm{w}\): 4.6 versus 4.9–5.0 for Bentheimer; 4.8 versus 4.9–5.0 for Castlegate and 5.3 versus 5.3–6.5 for Leopard.