PETE311_06A_Class22_(Maggard)

PETE311_06A_Class22_(Maggard) - Laboratory Measurement of...

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Laboratory Measurement of Capillary Pressure
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LABORATORY METHODS FOR MEASURING CAPILLARY PRESSURE Porous diaphragm method Mercury injection method Centrifuge method Dynamic method Determination of P c (S w ) function
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POROUS DIAPHRAGM METHOD FOR CAPILLARY PRESSURE Scale of Brine Ultra-fine fritted glass disk Seal of red oil squared paper Saran tube Crude oil Nitrogen pressure Neoprene stopper Nickel- plated spring Kleenex paper Core Porous diaphragm method of measuring capillary pressure Modified from Welge and Bruce, 1947
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CAPILLARY PRESSURE USING POROUS DIAPHRAGM METHOD Capillary pressure, psia Wetting phase saturation, % Measured data points Irreducible Wetting Phase Saturation Displacement pressure 0 100
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COMMENTS ON POROUS DIAPHRAGM METHOD Advantages Very accurate Can use reservoir fluids Disadvantages Very slow (days, weeks, months) Range of capillary pressure is limited by “displacement pressure” of porous disk Wetting phase of disk should be same as core sample Holes in porous disk act as capillaries, allowing only wetting to flow out until displacement pressure is exceeded
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MERCURY INJECTION METHOD FOR CAPILLARY PRESSURE Lucite window Lucite window To 0-2,000 psi pressure gauge Regulating valve atmosphere U-tube monometer Cylinder 0-200 psi pressure gauge From Purcell, 1949
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COMMENTS ON MERCURY INJECTION METHOD Advantages Results obtained quickly (minutes,hours) Method is reasonably accurate Very high range of capillary pressures Disadvantages
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PETE311_06A_Class22_(Maggard) - Laboratory Measurement of...

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