PETE311_06A_Class28_(Maggard)

PETE311_06A_Class28_(Maggard) - Laboratory Measurement of...

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Laboratory Measurement of Relative Permeability
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Hysteresis Effect on Rel. Perm. 0 20 40 60 80 100 0 2 04 06 08 0 1 0 0 Drainage Imbibition k rnw Wetting Phase Saturation, %PV Relative Permeability, % Residual non-wetting phase saturation Irreducible wetting phase saturation Non-wetting phase Wetting phase k rnw k rw
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Hysteresis Effect on Rel. Perm. During drainage , the wetting phase ceases to flow at the irreducible wetting phase saturation This determines the maximum possible non-wetting phase saturation Common Examples: Petroleum accumulation (secondary migration) Formation of secondary gas cap During imbibition , the non-wetting phase becomes discontinuous and ceases to flow when the non-wetting phase saturation reaches the residual non-wetting phase saturation This determines the minimum possible non-wetting phase saturation displacement by the wetting phase Common Example: waterflooding water wet reservoir
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Oil Water Gas L A k q o o o o μ ΔΦ = L A k q w w w w ΔΦ = L A k q g g g g ΔΦ = Review: Effective Permeability Steady state, 1D, linear flow equation (Darcy units): q n = volumetric flow rate for a specific phase, n A = flow area ΔΦ n = flow potential drop for phase, n (including pressure, gravity and capillary pressure terms) n = fluid viscosity for phase n L = flow length Modified from NExT, 1999; Amyx, Bass, and Whiting, 1960; PETE 311 NOTES
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Rel. Perm. - Steady State Purpose: determination of two phase relative permeability functions irreducible wetting phase saturation (drainage) residual non-wetting phase saturation (imbibition)
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Rel. Perm. - Steady State
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This note was uploaded on 12/03/2009 for the course PETE 311 taught by Professor Staff during the Spring '08 term at Texas A&M.

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PETE311_06A_Class28_(Maggard) - Laboratory Measurement of...

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